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HomeMy WebLinkAboutStorm Water 1-5 BLD-2018-0109 1510 Latitude Circle Ld7 /Z MAR A 2 2Ulti PLANNING, COMMUNITY,&ECONOMIC DEVELOPMENT DEPARTMENT Gr!,n Mailing Address: PO Box 547,Anacortes,WA 98221 t �'''�• Phone:360.299.1984,Fax: 360.293.1938 k7A� wy CO I- Mete Residential Storm.:'ester Plan Checklist '` Minimum Requires,-onto 1 m6 Stormwater requirements are based on the 2012 Stormwater Management Manual for Western Washington(SWMMWW).A link is provided on the City of Anacortes website,under Planning Department,Stormwater Regulations,as well as under the Engineering Division of Public Works. Residential construction is exempt from additional stormwater provisions if it involves no expansion of hard surfaces, no use beyond that previously existing,and results in no significant adverse hydrological impact. Building permit applications for lots that are part of a subdivision that was recorded no more than 10 years prior to the date of the complete building permit application may continue to use the stormwater codes in effect at the time the subdivision application was submitted, if stormwater was addressed at the subdivision/plat level. If construction has not started as of January 1,2022,the site will be subject to the 2012/2014 manual. If your project adds less than 2,000 sq.ft.of new plus replaced hard surface area,AND which disturbs less than 7,000 square feet of land,you must consider all 13 Elements of the Construction Stormwater Pollution Plan (SWPPP). Fill out the SWPPP Checklist and explain how the elements are considered,or describe how site conditions render the element unnecessary and the exemption from that element is clearly justified. You will not need to continue with this document. If your project adds 2,000 sq.ft.or more of new plus replaced hard surface area, thR which disturbs 7,000 sq.ft.or more of land-Minimum Requirements 1-5 of the SWMMWW apply,and you can continue with this document. If adding 5,000 sq.ft.or more of new hard surfaces/OR converting 32,670 sq.ft.or more of vegetation to lawn or landscaped area/OR converting 108,900 sq.ft.or more of native vegetation to pasture— inimum Requirements 1-9 of the SWMMWW apply. If Minimum requirements 1-9 apply, please see the Large Scale Stormwater Plan Checklist for additional submittal requirements. , 1 /{ II Owner blame:4�t�/ /4o/7-�4/444276S,LLCSite Address:. /5f2 44r/?G!oE 6/eC.-4 Brief Description of the Project: /T .`f / Foie /e i,.*.tl% Pre Developed Conditions&Runoff of the Site: Page 1 of 4 March 22,2017 Developed Conditions&Run4f of the Site: Summarize difficult site parameters,the natural drainage system,and drainage to and from adjacent properties,including bypass flows: ❑ Hydrol gical Site Plan:Collect and analyze information on existing conditions to aid in determining low impact development feasibility—which locations are most appropriate to evaporate,transpire,and infiltrate,with the following information: o Survey by Land Surveyor,Engineer,or other qualified professional:Show existing public and private development, utility infrastructure, hydrological features(seeps, springs, closed depression areas,drainage swales, streams, wetlands,and water body survey and classification report showing wetland and buffer boundaries),flood hazard areas,geological hazards, buffers,aquifer and wellhead protection areas,topographic features that may act as natural stormwater storage, infiltration,or conveyance. Include the natural receiving waters that stormwater runoff will either directly or eventually discharge.Show topography,display acreage and outlines of all drainage basins; existing stormwater drainage to and from the site; routes to existing, construction,and future flows at all discharge points;and the length of travel from the farthest upstream end of a proposed storm drainage system to any proposed flow control and treatment facility. Identify areas of potential erosion problems Show contours as follows: a Up to 10%slopes=2 ft.contours • Over 10%to less than 20%slopes=5 ft.contours s 20%or greater slopes= 10 ft.contours • Elevations at 25 ft. intervals o Soils Report:Done by a soil scientist certified by Soil Science Society of America, licensed sewage designer,or other suitably trained persons working under the supervision of a professional engineer,geologist,hydrologist,or any other professional supervised by an engineering geologist registered in Washington State.(Soils Report Page 2 of 4 March 22, 2017 must include details as listed on Pg.79). In addition, describe soils by name,erodibility, settleability, permeability,depth,texture, and soil structure. Testin>?should occur between December 1 and A rp it 1. o Soils 6`&p: Based on the report. o prreiirainarry Development Site Plan kay© t: Locate proposed buildings, roads, parking lots, landscaping features,on-site stormwater management BMPS(Determine BMPs starting on Pg. 95. Suggested BMPs correlate with responses to the 13 elements of the SWPPP, Pg. 237, and preliminary location of stormwater treatment and retention/detention facilities. Considerations are on Pg. 83. These methods could reduce required facility sizes, but are not required for approval.Show existing and proposed contours,show all cut and fill slopes indicating top and bottom of slope catch lines,and identify developed condition drainage basins. o Survey of existing nativewegQ4atiox r©verr:This is only required if there are native soil and vegetation protection areas proposed for the site.Survey shall be done by a licensed architect,arborist, qualified biologist or project proponent identifying any forest areas on the site and a plan to protect those areas.The preserved area should be placed in a separate tract or protected through recorded easements for individual lots. o Vicinity Pulap:Clearly locate the property, identify all roads bordering the site,show the route of stormwater off-site to the local natural receiving water,and show significant geographic features and sensitive/critical areas(streams,wetlands, lakes, steep slopes, etc). 0 CConstrruction Storrrnwatorr Pollution Pvevention Pion Slf19PPG1=The SWPPP shall be implemented beginning with initial land disturbance and until final stabilization. From October 1 through April 30,clearing,grading,and other soil disturbing activities shall only be permitted if shown that silt-laden runoff will be prevented from leaving the site through methods listed on pg. 44. Best Management Practices(BMPs)Standards and Specifications are listed on pg. 261. Please see pg. 230 for details on using the Site Analysis to produce the following materials: o Narrative: Explain and justify the pollution prevention decisions made.This will contain concise information concerning existing site conditions,construction schedules, wet season construction activity,constraints, and other pertinent items that are not contained on the drawings. This is based on the 13 Construction Elements, which must be considered unless site conditions render the element unnecessary and the exemption is clearly justified. Elements listed on pg.44 &described in detail starting on pg. 236. o Drraysings 81 Motes:Where and when the BMPs should be installed,the performance the BMPs are expected to achieve,and actions that will be taken if the performance goals are not achieved.Show water quality monitoring locations. o Special Reports&Studies:Include any studies(i.e.wetlands delineation). If a facility is required and feasible for Minimum Requirement 5,a PIT Test must be done in the location that the facility location is proposed based on the preliminary development site plan layout. ❑ Other permits:Any other necessary permits as required by other regulatory agencies. Identify if those permits include conditions that affect the drainage plan, or contain more restrictive drainage-related requirements. Prior to Final Stormwater inspection ❑ Permanent Stormwater Control Plan Drawing:Select BMPs based on the Preliminary Development Site Plan Layout from the Site Analysis Summary. Provide a scale drawing of the Page 3 of 4 March 22,2017 lot(s)and any public ROW that displays the location of On-Site BMPs and the areas served by them.These documents will be recorded and attached to a declaration of covenant and grant of easement associated with each lot that includes On-site BMPs. Provide design details,figures, and maintenance instructions for each BMP. Provide a written summary of how it complies with the applicable requirements. Prlorr to Flna0 Occupancy ❑ Operatl©n c Maintenance Manual: Include a manual for each flow control and treatment facility, including any distributed bioretention facilities that are used to help meet flow control and/or treatment requirements.The manual shall include a description of the facility,what it does,and how it works. It must also identify and describe the maintenance tasks,and the frequency of each task.The tasks and frequencies must meet the standards of the SWMMWW. Include a maintenance activity log that will indicate what actions will have been taken and where it should be kept and made available for inspection by the City. ❑ Declaration of Covenant for Privately Maintained) Flow Control : Treatment Facilities and in- Site Stormwater Management BMPs:Any flow control&treatment facilities and On-Site Stormwater management BMPs for which the applicant identifies operation&maintenance to be the responsibility of a private party must have a declaration of covenant and grant of easement.After City approval,the declaration of covenant and grant of easement must be signed and recorded. Design details,figures,and maintenance instructions for any BMP shall be attached.A map showing the location of newly planted and retained trees claimed as flow reduction credits shall also be attached. ❑ Record Documents: Record total impervious surface area of the site and their locations with the county auditor. By signing below,you are certifying that you have read and understand the st:rmwater requirements. Be sure that you have checked off all applicable boxes. ( /l 2 07 22 Applicant Signature D417" • Page 4of4 March 22, 2017 EXHIBIT "A" 1510 LATITUDE CIRCLE LOT 12, PLAT OF 48 NORTH P133670 Responses to the "Complete Residential Stormwater Plan Checklist—Minimum Requirements 1-5". Brief Description of the Project: To construct one Single-Family Residence (SFR) on a single legal lot within the City of Anacortes. The existing property is located at 1510 Latitude Circle, which is LOT 12, Plat of 48 North, and is 8,849 square feet in size, Zoned as R2. Pre Developed Conditions & Runoff on the Site: The property is vacant. The site slopes from the east to the west at a grade of approximately 6.4%. The property is bounded as follows: SOUTH: 4306 Whidbey Court, P82594 and 4308 Whidbey Court, P82593. SOUTHEAST: P32372, Port of Anacortes. EAST: P31664, Port of Anacortes. NORTH: Lot 11. 48 North. NORTHWEST: Full improved street of Latitude Circle WEST: Lot 13,48 North. Developed Conditions& Runoff of The Site: The proposed improvements are as follows: Construct a SFR with an approximate lot coverage of 24.4%, and an impervious lot coverage of 46.9%. No detention was required for the Plat of 48 North, but there is an existing water quality bio-swale for the plat. All roof drains and footing drains will be hard lined to the existing stormwater collection system. The point of connection for LOT 12 is located in the northwest corner of the property. After construction, landscaping will be provided to permanently stabilize the site from erosion. Summarize difficult site parameters, the natural drainage system, and drainage to and from adjacent properties, including bypass flows: The site slopes from the southeast to the northwest at an approximate grade of 6.4% and the disturbed soil has been seeded and/or mulched to reduce erosion. The only significant tributary drainage the lot may receive is from the Port of Anacortes properties and from 4308 Whidbey Court. Intercept drains may be necessary to divert runoff from said properties. Hydrological Site Plan: Survey: A topographic survey has been performed by Herrigstad Engineering, showing the existing improvements around and within the subject property, along with the existing contours at 2-foot intervals. Soils Report: A Geologic Hazard Assessment and Geotechnical Engineering Services report was prepared by GeoEngineers, dated July, 21, 2015, and is already part of the record documents provided to the City of Anacortes. Preliminary Development Site Plan Layout: An "Erosion Control &Site Plan" has been prepared by Landed Gentry Development, Inc., showing both the existing and proposed improvements as requested. See attached. A "Survey of existing native vegetation cover" was performed by the Urban Forestry Services, Inc., for the project, dated August 12, 2015, and a tree preservation plan was developed and adopted by the City of Anacortes. A "Vicinity Map" has been provided on Sheet 2 of 2 of the "Erosion Control &Site Plan", attached. Construction Stormwater Pollution Prevention Plan (SWPPP): See attached. Other Permits: Building Permit for SFR. f`.13 AJ ���• Planning, Community, & Economic Development Department c gf. PO B.x 547, /A nacortes, ';'.%A 98221 PH: 360.299.1984 (CConstQuc ion Ctor c ;4tei P©llatiorr Prevention Plan) Please check off boxes to show that each element has been read and understood.Provide details where applicable and if certain aspects are unnecessary or exempt, clearly justify. Details of the 13 Elements and the correlating BMPs are listed on Pg. 236 of the 2014 Stormwater Management Manual for Western Washington(SWMMWW).A link is provided on the City of Anacortes website, under Planning, Community,&Economic Development Department,as well as under Stormwater on the Engineering Division of Public Work's page. Owner Name: fig A D,zm AnI+4 C ,(/ £ /- Site Address: /7- --74) Z. R%l Tt1/2E ,���CL r Prepared By: q/1) 1 .e_i() N/7W y" PPeVe-LOP/k1r ! ,'= The Stormwater checklist or building permit determined that: ❑ The 13 elements must be addressed for ❑ These elements must be addressed for construction activity adding under 2,000 construction activity adding 2,000 sq.ft. sq.ft.of hard surface area. or more of hard surface area. This means that an attached narrative and site plan are required with this document. Under each element,explain the lest many_A cent practices o P) used n ustif i real©ninj, f©r those that will not be used. if needed plgese attach a narrative to further explain plans or°RoLg , of gyAgn° // � C Jr✓ f/ f 1:t7/z / c EL �rli EI T 1: Preserve Vegetation/Mark Clearing Limits ❑ Before beginning land disturbing activities, including clearing and grading,clearly mark all clearing limits,sensitive areas and their buffers, and trees that are to be preserved within the construction area. ❑ Retain the duff layer, native top soil,and natural vegetation in an undisturbed state to the maximum degree practical. Page 1 of 8 March,2017 ELEMENT 2: Establish Construction Access ❑ Limit construction vehicle access and exit to one route,if possible. ❑ Stabilize access points with a pad of quarry spalls,crushed rock,or other equivalent BMPs,to minimize tracking onto roads. ❑ Locate wheel wash or tire baths on site,if the stabilized construction entrance is not effective in preventing tracking sediment onto roads. ❑ If sediment is tracked off site,clean the affected roadway thoroughly at the end of each day,or more frequently as necessary(ex:wet weather). Remove sediment from roads by shoveling, sweeping,or pick up and transport the sediment to a controlled sediment disposal area. ❑ Conduct street washing only after sediment is removed in accordance with the above bullet. ❑ Control street wash wastewater by pumping back on site or otherwise preventing it from discharging into systems tributary to waters of the State. ELEMENT 3: Control Flow Rates ❑ Protect properties and waterways downstream of development sites from erosion and the associated discharge of turbid waters due to increases in the velocity and peak volumetric flow rate of stormwater runoff from the project site. ❑ Where necessary to comply with the bullet above,construct stormwater retention or detention facilities as one of the first steps in grading.Assure that detention facilities function properly before constructing site improvement(e.g. impervious surfaces). O If permanent infiltration ponds are used for flow control during construction, protect these facilities from siltation during the construction phase. ELEMENT 4: Install Sediment Controls O Design, install,and maintain effective erosion controls and sediment controls to minimize the discharge of pollutants. ❑ Construct sediment control BMPs(sediment ponds, traps, filters,etc.)as one of the first steps in grading.These BMPs shall be functional before other land disturbing activities take place. ❑ Minimize sediment discharges from the site.The design, installation and maintenance of erosion and sediment controls must address factors such as the amount,frequency,intensity and duration of precipitation,the nature of resulting stormwater runoff,and soil characteristics, including the range of soil particle sizes expected to be present on the site. O Direct stormwater runoff from disturbed areas through a sediment pond or other appropriate sediment removal BMP, before the runoff leaves a construction site or before discharge to an Page 2 of B March,2017 infiltration facility. Runoff from fully stabilized areas may be discharged without a sediment removal BMP,but must meet the flow control performance standard in Element#3, bullet#1. ❑ Locate BMPs intended to trap sediment on-site in a manner to avoid interference with the movement of juvenile salmonids attempting to enter off-channel areas or drainages. ❑ Provide and maintain natural buffers around surface waters,direct stormwater to vegetated areas to increase sediment removal, and maximize stormwater infiltration. ❑ Where feasible,design outlet structures that withdraw impounded stormwater from the surface to avoid discharging sediment that is still suspended lower in the water column. EtI EivrE I 5: Stabilize Soils ❑ Stabilize exposed and unworked soils by application of effective BMPs that prevent erosion. Applicable BMPs include, but are not limited to:temporary and permanent seeding,sodding, mulching, plastic covering,erosion control fabrics and matting,soil application of polyacrylamide(PAM),the early application of gravel base early on areas to be paved,and dust control. ❑ Control stormwater volume and velocity within the site to minimize soil erosion. ❑ Control stormwater discharges, including both peak flow rates and total stormwater volume,to minimize erosion at outlets and to minimize downstream channel and stream bank erosion. ❑ Soils must not remain exposed and unworked for more than the time periods set forth below to prevent erosion. o During the dry season(May 1—Sept 30):7 days o During the wet season(Oct 1—Apr 30):2 days ❑ Stabilize soils at the end of the shift before a holiday or weekend if needed based on the weather forecast. ❑ Stabilize soil stockpiles from erosion, protect with sediment trapping measures,and where possible, be located away from storm drain inlets,waterways, and drainage channels. ❑ Minimize the amount of soil exposed during construction activity. ❑ Minimize the disturbance of steep slopes. ❑ Minimize soil compaction and, unless infeasible, preserve topsoil. ELEMENT 6: Protect Slopes ❑ Design and construct cut-and-fill slopes in a manner to minimize erosion.Applicable practices include,but are not limited to, reducing continuous length of slope with terracing and diversions,reducing slope steepness,and roughening slope surfaces(Ex:track walking). Page 3of8 March, 2017 ❑ Divert off-site stormwater(run-on)or ground water away from slopes and disturbed areas with interceptor dikes,pipes,and/or swales.Off-site stormwater should be managed separately from stormwater generated on the site. ❑ At the top of slopes,collect drainage in pipe slop drains or protected channels to prevent erosion. o *Temporary pipe slope drains must handle the peak volumetric flow rate calculated using a 10-minute time step from a Type 1A, 10-year,24-hour frequency storm for the developed condition.Alternatively,the 10-year, 1-hour flow rate predicted/indicated by an approved continuous runoff model,increased by a factor of 1.6,may be used.The hydrologic analysis must use the existing land cover condition for predicting flow rates from tributary areas outside the project limits. For tributary areas on the project site, the analysis must use the temporary or permanent project land cover condition, whichever will produce the highest flow rates. If using the Western Washington Hydrology Model(WWHM)to predict flows, bare soil areas should be modeled as "landscaped"area. o Where 15-minute time steps are available in an approved continuous runoff model,they may be used directly without a correction factor. ❑ Place excavated material on the uphill side of trenches,consistent with safety and space considerations. ❑ Place check dams at regular intervals within constructed channels that are cut down a slope. ❑ Consider soil types and its potential for erosion. ❑ Stabilize soils on slopes,as specified in Element 5. ❑ BMP combinations are the most effective method of protecting slopes with disturbed soils. Ex: Use both mulching and straw erosion control blankets. ELEMENT 7: Protect Drain Inlets ❑ Protect all storm drain inlets made operable during construction so that stormwater runoff does not enter the conveyance system without first being filtered or treated to remove sediment. ❑ Clean or remove and replace inlet protection devices when sediment has filled one-third of the available storage(unless a different standard is specified by the product manufacturer). ❑ Where possible,protect all existing storm drain inlets so that stormwater runoff does not enter the conveyance system without first being filtered or treated to remove sediment. ❑ Keep all approach roads clean. Do not allow sediment and street wash water to enter storm drains without prior and adequate treatment unless treatment is provided before the storm drain discharges to waters of the State. ❑ Inlets should be inspected weekly at a minimum and daily during storm events. Page 4 of 8 March,2017 EEEr',ENT 8:Stabilize Channels and Outlets ❑ Design,construct,and stabilize all on-site conveyance channels to prevent erosion from the following expected peak flows: o *Channels must handle same peak volumetric flow rate as temporary pipe slope drains listed in Element 6,above. ❑ Provide stabilization, including armoring material,adequate to prevent erosion of outlets, adjacent streambanks,slopes, and downstream reaches at the outlets of all conveyance systems. ❑ The best method for stabilizing channels is to completely line the channel with a blanket product first,then add check dams as necessary to function as an anchor and to slow the flow of water. EL!!( 'ENT 9: Control Pollutants ❑ Design, install, implement,and maintain effective pollution prevention measures to minimize the discharge of pollutants. ❑ Handle and dispose of all pollutants, including waste materials and demolition debris that occur on-site in a manner that does not cause contamination of stormwater. ❑ Provide cover,containment,and protection from vandalism for all chemicals, liquid products, petroleum products,and other materials that have the potential to pose a threat to human health or the environment.On-site fueling tanks must include secondary containment. Secondary containment means placing tanks or containers within an impervious structure capable of containing 110%of the volume contained in the largest tank within the containment structure. Double-walled tanks do not require additional secondary containment. ❑ Conduct maintenance,fueling,and repair of heavy equipment and vehicles using spill prevention and control measures.Clean contaminated surfaces immediately following any spill incident. ❑ Discharge wheel wash or tire bath wastewater to a separate on-site treatment system that prevents discharge to surface water,such as closed-loop recirculation or upland land application,or to the sanitary sewer,with local sewer district approval.Wheel wash or tire bath wastewater should not include wastewater from concrete washout areas. O Apply fertilizers and pesticides in a manner and at application rates that will not result in loss of chemical to stormwater runoff. Follow manufacturers' label requirements for application rates and procedures. O Use BMPs to prevent contamination of stormwater runoff by pH-modifying sources.The sources for this contamination include,but are not limited to: bulk cement, cement kiln dust,fly ash, new concrete washing and curing waters,waste streams generated from concrete grinding and sawing,exposed aggregate processes,dewatering concrete vaults,concrete pumping,and mixer washout waters.Adjust the pH of stormwater if necessary to prevent violations of the water quality standards. Page 5 of 8 March,2017 ❑ Assure that washout of concrete trucks is performed off-site or in designated concrete washout areas only. Do not wash out concrete trucks onto the ground,or into storm drains,open ditches, streets,or streams. Do not dump excess concrete on site, except in designated concrete washout areas.Concrete spillage or concrete discharge to surface waters of the State is prohibited. Do not use upland land applications for discharging wastewater from concrete washout areas. ❑ Obtain written approval from Ecology and provide to the City before using chemical treatment other than CO2 or dry ice to adjust pH. ❑ Woody debris may be chopped and spread on site. ❑ Conduct oil changes, hydraulic system drain down,solvent and de-greasing cleaning operations, fuel tank drain down and removal,and other activities which may result in discharge or spillage of pollutants to the ground or into stormwater runoff using spill prevention measures,such as drip pans. ❑ Clean contaminated surfaces immediately following any discharge or spill incident. Emergency repairs may be performed on-site using temporary plastic placed beneath and, if raining,over the vehicle. ELE _ NT 10: Control De-Watering ❑ Discharge foundation, vault,and trench dewatering water,which have characteristics similar to stormwater runoff at the site,into a controlled conveyance system before discharge to a sediment trap or sediment pond. ❑ Discharge clean, non-turbid de-watering water, such as well-point ground water,to systems tributary to,or directly into surface waters of the State, as specified in Element 8,provided the de-watering flow does not cause erosion or flooding of receiving waters or interfere with the operation of the system. Do not route clean dewatering water through stormwater sediment ponds. Note that"surface waters of the State" may exist on a construction site as well as off site;for example,a creek running through a site. ❑ Handle highly turbid or contaminated dewatering water separately from stormwater. ❑ Other treatment or disposal options may include: 1. Infiltration 2. Transport off-site in a vehicle, such as a vacuum flush truck,for legal disposal in a manner that does not pollute state waters. 3. Ecology-approved on-site chemical treatment or other suitable treatment technologies. 4. Sanitary or combined sewer discharge with local sewer district approval,if there is no other option. 5. Use of a sedimentation bag with outfall to a ditch or swale for small volumes of localized dewatering. ❑ Construction equipment operation,clamshell digging,concrete tremie pour,or work inside a cofferdam can create highly turbid or contaminated dewatering water. ❑ Discharging sediment-laden(muddy)water into waters of the State likely constitutes a violation Page 6 of 8 March,2017 of water quality standards for turbidity.The easiest way to avoid discharging muddy water is through infiltration and preserving vegetation. • ELEi`IENT 11: Maintain BMPs ❑ Maintain and repair all temporary and permanent erosion and sediment control BMPs as needed to assure continued performance of their intended function in accordance with BMP specifications. ❑ Remove all temporary erosion and sediment control BMPs within 30 days after achieving final site stabilization or after the temporary BMPs are no longer needed.Some temporary erosion and sediment control BMPs are bio-degradable and designed to remain in place following construction such as compost socks. ❑ Provide protection to all BMPs installed for the permanent control of stormwater from sediment and compaction.All BMPs that are to remain in place following completion of construction shall be examined and placed in full operating conditions. If sediment enters the BMPs during construction, it shall be removed and the facility shall be returned to the conditions specified in the construction documents. ❑ Remove or stabilize trapped sediment on site. Permanently stabilize disturbed soil resulting from removal of BMPs or vegetation. ELEMENT 12: Manage the Project—Projects subject to Minimum Requirements 1-9 must have a Certified Erosion and Sediment Control Lead (CESCL)for site inspections. Projects subject to Minimum Requirements 1-5 do not require the inspector to be certified. By the initiation of construction,the SWPPP must identify the CESCL or inspector,who shall be present on-site or on-call at all times. Management details starting on rfi- ❑ Phase development projects to the maximum degree practicable and take into account seasonal work limits to prevent soil erosion and prevent transporting sediment from the site during construction. ❑ Inspection and monitoring—Inspect,maintain, and repair all BMPs as needed to assure continued performance of their intended function. ❑ Maintain, update,and implement the SWPPP. ❑ Clearing and grading activities for developments shall be permitted only if conducted using an approved site development plan(e.g.,subdivision approval). ❑ From Oct 1 through Apr 30,clearing,grading,and other soil disturbing activities is permitted only if shown that the site operator will prevent silt-laden runoff from leaving the site through a combination of the following: Page 7 of 8 March,2017 1. Site conditions including existing vegetative coverage,slope,soil type,and proximity to receiving waters. 2. Limit activities and the extent of disturbed areas. 3. Proposed erosion and sediment control measures. Weather conditions can influence the seasonal limitation on site disturbance.The City of Anacortes has the authority to take enforcement action per AMC 19.76 Stormwater. ❑ The following activities are exempt from the seasonal clearing and grading limitations: 1. Routine maintenance and necessary repair of erosion and sediment control BMPs; 2. Routine maintenance of public facilities or existing utility structures that do not expose the soil or result in the removal of the vegetative cover to soil 3. Activities where there is 100%infiltration of surface water runoff within the site in approved and installed erosion and sediment control facilities. MEV PENT 13: Protect Low Impact Development BMPS ❑ If implementing any bioretention facilities or rain gardens, see °: for requirements. /1 PI.X-- 02 f2Z/20 �plic t Signature D�xe Page 8of8 March,2017 EXHIBIT "B" 1510 LATITUDE CIRCLE LOT 12, PLAT OF 48 NORTH e ,a P133670 Responses to the "13 Elements of SWPPP" (Construction Stormwater Pollution Prevention Plan) ELEMENT 1: Preserve Vegetation/Mark Clearing Limits The clearing limits will be marked by using either BMP C233: Silt Fence, or BMP C103: High Visibility Plastic or Metal Fence, as shown on the Erosion Control Plan. C233 is to be used along the west and north property lines and the C103 along the east and south property lines. Preservation of the native top soil will be preserved as much as is practical by use of a stock pile as shown on the Erosion Control Plan. Stock pile location may vary. Stock pile shall be protected as indicated on the Erosion Control Plan. ELEMENT 2: Establish Construction Access BMP C105 shall be used as the construction access. Only one access point is proposed. No wheel wash is proposed. Any track out shall be cleaned daily by shoveling and/or sweeping. More frequent cleaning as necessary. ELEMENT 3: Control Flow Rates No flow rate controls are designed for the individual lot. However, erosion control BMPs described in ELEMENT 4, below will reduce velocity of flows. ELEMENT 4: Install Sediment Controls The following BMPs are proposed as temporary sediment controls: C233: Silt Fence To be place along the perimeter of the site to protect downstream properties from the transport of coarse sediment, as well as to mark the clearing limits for the construction crew and to alert the public as to the potential dangers of the ongoing onsite construction activity. C105: Stabilized Construction Entrance To be place in the location of the proposed driveway off of Latitude Circle, to provide a stable and clean point of access for construction vehicles. C121: Mulching To provide immediate temporary protection of exposed soil from erosion, as well as conserving moisture. C123: Plastic Covering Primarily used to protect the stock pile from erosion. May be used as a short term cover of small areas of exposed soil. Not intended for large areas. C140: Dust Control As this project will be constructed during the dry season, dust control may be necessary to protect the surrounding neighborhood. The primary source of dust control will be from spraying of the disturbed area with water. C220: Storm Drain Inlet Protection Onsite inlet protection will use Block& Gravel Curb Inlet Protection. Offsite inlet protection will use Catch Basin Filters manufactured for use at construction sites. C207: Check Dams Where drainage swale are created to convey stormwater,temporary gravel check dams may be used to reduce velocity and to dissipate flow energy. The following BMP improvement(s) are proposed for permanent sediment controls: C124: Sodding Sodding is to establish permanent turf for immediate erosion protection. C125:Top Soiling Provides a suitable growth medium for final site stabilization with vegetation. T5.13: Post-Construction Soil Quality and Depth Establishes soil quality and depth regains greater stormwater functions in the post development landscape, provides increased treatment of pollutants and sediments that result from development and habitation. ELEMENT 5: Soil Stabilization The following are temporary soil stabilization BMPs: C233: Silt Fence To be place along the perimeter of the site to protect downstream properties from the transport of coarse sediment, as well as to mark the clearing limits for the construction crew and to alert the public as to the potential dangers of the ongoing onsite construction activity. C105: Stabilized Construction Entrance To be place in the location of the proposed driveway on Latitude Circle,to provide a stable and clean point of access for construction vehicles. C121: Mulching To provide immediate temporary protection of exposed soil from erosion, as well as conserving moisture. C123: Plastic Covering Primarily used to protect the stock pile from erosion. May be used as a short term cover of small areas of exposed soil. Not intended for large areas. C140: Dust Control As this project will be constructed during the dry season, dust control may be necessary to protect the surrounding neighborhood. The primary source of dust control will be controlled spraying of the disturbed area with water. C220: Storm Drain Inlet Protection Onsite inlet protection will use Block & Gravel Curb Inlet Protection. Offsite inlet protection will use Catch Basin Filters manufactured for use at construction sites. C207: Check Dams Where drainage swale are created to convey stormwater, temporary gravel check dams may be used to reduce velocity and to dissipate flow energy. The following are permanent soil stabilization BMPs: C124: Sodding Establishes permanent turf for immediate erosion protection. C125:Top Soiling Provides a suitable growth medium for final site stabilization with vegetation. T5.13: Post-Construction Soil Quality and Depth Establishes soil quality and depth regains greater stormwater functions in the post development landscape, provides increased treatment of pollutants and sediments that result from development and habitation. ELEMENT 6: Protect Slopes C122: Nets and Blankets Nets and Blankets are intended to prevent erosion and hold seed and mulch in place on steep slopes and in channels so vegetation can become well established. C235: Straw Wattles Straw Wattles reduce the velocity and can spread the flow of rill and sheet runoff, and can capture and retain sediment. ELEMENT 7: Protect Drain Inlets C220: Storm Drain Inlet Protection Onsite inlet protection will use Block & Gravel Curb Inlet Protection. Offsite inlet protection will use Catch Basin Filters manufactured for use at construction sites. ELEMENT 8: Stabilize Channels and Outlets C207: Check Dams Where drainage swale are created to convey stormwater, temporary gravel check dams may be used to reduce velocity and to dissipate flow energy. ELEMENT 9: Control Pollutants All fuel, lubricants, paint, and/or other hazardous material shall be stored in a lockable, covered storage container if kept on site. ELEMENT 10: Control De-Watering While excavating to install the sanitary sewer, stormdrain, and water systems to depths up to 14 feet, no ground water was encountered. Therefore, no dewatering is anticipated. However, should dewatering become necessary, it should be pumped and dispersed to a well vegetated area within the project site. ELEMENT 11: Maintain BMPs A trained Certified Erosion and Sedimentation Control Lead (CESCL) will be on the job site. CESCL personnel are trained in and responsible for the proper maintenance of the erosion control BMPs. The CESCL will work with the City of Anacortes Inspector to maintain all BMPs. ELEMENT 12: Manage the Project A trained Certified Erosion and Sedimentation Control Lead (CESCL) will be on the job site. CESCL personnel are trained in and responsible for the proper maintenance of the erosion control BMPs. The CESCL will work with the City of Anacortes Inspector to maintain all BMPs. ELEMENT 13: Protect Low Impact Development BMPs No low impact development BMPs are planned or required for this individual lot. EXH 10T°°C" 1510 LATITUDE CIRCLE LOT 12,PLAT OF 48 i O TH 133677 0 PRIMARY RMPs damage from burying and smothering. . Vegetative buffer zones for streams, lakes or other waterways shall be established by the local permitting authority or other state or federal permits or approvals. Maintenance Standards Inspect the area frequently to make sure flagging remains in place and the area remains undisturbed. Replace all damaged flagging immediately. IBMP C103: High Visibility Fence- Purpose Fencing is intended to: 1. Restrict clearing to approved limits. 2. Prevent disturbance of sensitive areas, their buffers, and other areas required to be left undisturbed. 3. Limit construction traffic to designated construction entrances, exits, or internal roads. 4. Protect areas where marking with survey tape may not provide adequate pro- tection. Conditi i ns of Use To establish clearing limits plastic, fabric, or metal fence may be used: . At the boundary of sensitive areas, their buffers, and other areas required to be left uncleared. . As necessary to control vehicle access to and on the site. Design and Installation Specifications High visibility plastic fence shall be composed of a high-density polyethylene material and shall be at least four feet in height. Posts for the fencing shall be steel or wood and placed every 6 feet on center (maximum) or as needed to ensure rigidity. The fencing shall be fastened to the post every six inches with a polyethylene tie. On long continuous lengths of fencing, a tension wire or rope shall be used as a top stringer to prevent sag- ging between posts. The fence color shall be high visibility orange. The fence tensile strength shall be 360 lbs./ft. using the ASTM D4595 testing method. If appropriate install fabric silt fence in accordance with BMP C233: Silt Fence (p.367)to act as high visibility fence. Silt fence shall be at least 3 feet high and must be highly vis- ible to meet the requirements of this BMP. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4-Page 269 Metal fences shall be designed and installed according to the manufacturer's spe- cifications. Metal fences shall be at least 3 feet high and must be highly visible. Fences shall not be wired or stapled to trees. Maintenance Standards If the fence has been damaged or visibility reduced, it shall be repaired or replaced immediately and visibility restored. 13MP C105: Stabilized Construction Entrance / Exit Purpose Stabilized Construction entrances are established to reduce the amount of sediment transported onto paved roads by vehicles or equipment. This is done by constructing a stabilized pad of quarry spalls at entrances and exits for construction sites. Conditions of Use Construction entrances shall be stabilized wherever traffic will be entering or leaving a construction site if paved roads or other paved areas are within 1,000 feet of the site. For residential construction provide stabilized construction entrances for each residence, rather than only at the main subdivision entrance. Stabilized surfaces shall be of suf- ficient length/width to provide vehicle access/parking, based on lot size/configuration. On large commercial, highway, and road projects, the designer should include enough extra materials in the contract to allow for additional stabilized entrances not shown in the initial Construction SWPPP. It is difficult to determine exactly where access to these projects will take place; additional materials will enable the contractor to install them where needed. Design and Installation Specifications See Figure II-4.1.1 Stabilized Construction Entrance (p.273) for details. Note: the 100' minimum length of the entrance shall be reduced to the maximum practicable size when the size or configuration of the site does not allow the full length (100'). Construct stabilized construction entrances with a 12-inch thick pad of 4-inch to 8-inch quarry spalls, a 4-inch course of asphalt treated base (ATB), or use existing pavement. Do not use crushed concrete, cement, or calcium chloride for construction entrance sta- bilization because these products raise pH levels in stormwater and concrete discharge to surface waters of the State is prohibited. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 270 Metal fences shall be designed and installed according to the manufacturer's spe- cifications. Metal fences shall be at least 3 feet high and must be highly visible. Fences shall not be wired or stapled to trees. Maintenance Standards If the fence has been damaged or visibility reduced, it shall be repaired or replaced immediately and visibility restored. SNIP CI05: Stabilized Construction Entrance / Exit Purpose Stabilized Construction entrances are established to reduce the amount of sediment transported onto paved roads by vehicles or equipment. This is done by constructing a stabilized pad of quarry spalls at entrances and exits for construction sites. Conditions of Use Construction entrances shall be stabilized wherever traffic will be entering or leaving a construction site if paved roads or other paved areas are within 1,000 feet of the site. For residential construction provide stabilized construction entrances for each residence, rather than only at the main subdivision entrance. Stabilized surfaces shall be of suf- ficient length/width to provide vehicle access/parking, based on lot size/configuration. On large commercial, highway, and road projects, the designer should include enough extra materials in the contract to allow for additional stabilized entrances not shown in the initial Construction SWPPP. It is difficult to determine exactly where access to these projects will take place; additional materials will enable the contractor to install them where needed. Design and Installation Specifications See Figure II-4.1.1 Stabilized Construction Entrance (p.273)for details. Note: the 100' minimum length of the entrance shall be reduced to the maximum practicable size when the size or configuration of the site does not allow the full length (100'). Construct stabilized construction entrances with a 12-inch thick pad of 4-inch to 8-inch quarry spalls, a 4-inch course of asphalt treated base (ATB), or use existing pavement. Do not use crushed concrete, cement, or calcium chloride for construction entrance sta- bilization because these products raise pH levels in stormwater and concrete discharge to surface waters of the State is prohibited. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4- Page 270 A separation geotextile shall be placed under the spalls to prevent fine sediment from pumping up into the rock pad. The geotextile shall meet the following standards: Grab Tensile Strength (ASTM D4751) 200 psi min. Grab Tensile Elongation (ASTM D4632) 30% max. Mullen Burst Strength (ASTM D3786-80a)400 psi min. AOS (ASTM D4751) 20-45 (U.S. standard sieve size) . Consider early installation of the first lift of asphalt in areas that will paved; this can be used as a stabilized entrance.Also consider the installation of excess concrete as a stabilized entrance. During large concrete pours, excess concrete is often available for this purpose. . Fencing (see BMP C103: High Visibility Fence (p.269)) shall be installed as neces- sary to restrict traffic to the construction entrance. . Whenever possible, the entrance shall be constructed on a firm, compacted sub- grade. This can substantially increase the effectiveness of the pad and reduce the need for maintenance. . Construction entrances should avoid crossing existing sidewalks and back of walk drains if at all possible. If a construction entrance must cross a sidewalk or back of walk drain, the full length of the sidewalk and back of walk drain must be covered and protected from sediment leaving the site. Maintenance Standards Quarry spalls shall be added if the pad is no longer in accordance with the spe- cifications. . If the entrance is not preventing sediment from being tracked onto pavement, then alternative measures to keep the streets free of sediment shall be used. This may include replacement/cleaning of the existing quarry spalls, street sweeping, an increase in the dimensions of the entrance, or the installation of a wheel wash. . Any sediment that is tracked onto pavement shall be removed by shoveling or street sweeping. The sediment collected by sweeping shall be removed or sta- bilized on site. The pavement shall not be cleaned by washing down the street, except when high efficiency sweeping is ineffective and there is a threat to public safety. If it is necessary to wash the streets, the construction of a small sump to con- tain the wash water shall be considered. The sediment would then be washed into the sump where it can be controlled. . Perform street sweeping by hand or with a high efficiency sweeper. Do not use a non-high efficiency mechanical sweeper because this creates dust and throws soils into storm systems or conveyance ditches. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 - Page 271 . Any quarry spalls that are loosened from the pad, which end up on the roadway shall be removed immediately. . If vehicles are entering or exiting the site at points other than the construction entrance(s), fencing (see BMP C103) shall be installed to control traffic. . Upon project completion and site stabilization, all construction accesses intended as permanent access for maintenance shall be permanently stabilized. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 272 Figure 11-4.1.1 Stabilized Construction Entrance NOT TO SCALE d //0° oa Olt-- \rr ' 100'min. .e e .. �••�•�1�1�I�I�� Install driveway •r ��r•,�,.• � ���r culvert if there is a emu,• Y Y `'. �•v � W � AP �. roadside ditch present `X-• •X `r— X—•. 4"-8"quarry i=. �is.- . �s.- :��..�........ spalls �� � � �� � � Geotextile '111 e�J'`v4!8W'• Notes: 15'min. 1. Driveway shall meet the requirements of the 12"minimum thickness permitting agency. 2. It is recommended that Provide full width the entrance be of ingress/egress crowned so that runoff area drains off the pad. ift1=1.1 Figure I I-4.1 .1 Stabilized Construction Entrance DEPARTMENT OF Revised June 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability,and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 - Page 273 Approved as Equivalent Ecology has approved products as able to meet the requirements of BMP C105: Stab- ilized Construction Entrance / Exit. The products did not pass through the Technology Assessment Protocol — Ecology (TAPE) process. Local jurisdictions may choose not to accept this product approved as equivalent, or may require additional testing prior to con- sideration for local use. The products are available for review on Ecology's website at http://www.ecy.wa.gov/programs/wq/stormwater/newtech/equivalent.html BMP C106: Wheel Wash Purpose Wheel washes reduce the amount of sediment transported onto paved roads by motor vehicles. Conditions of Use When a stabilized construction entrance (see BMP C105: Stabilized Construction Entrance/ Exit(p.270)) is not preventing sediment from being tracked onto pavement. . Wheel washing is generally an effective BMP when installed with careful attention to topography. For example, a wheel wash can be detrimental if installed at the top of a slope abutting a right-of-way where the water from the dripping truck can run unimpeded into the street. . Pressure washing combined with an adequately sized and surfaced pad with dir- ect drainage to a large 10-foot x 10-foot sump can be very effective. . Discharge wheel wash or tire bath wastewater to a separate on-site treatment sys- tem that prevents discharge to surface water, such as closed-loop recirculation or upland land application, or to the sanitary sewer with local sewer district approval. . Wheel wash or tire bath wastewater should not include wastewater from concrete washout areas. Design and Installation Specifications Suggested details are shown in Figure 11-4.1.2 Wheel Wash (p.276). The Local Per- mitting Authority may allow other designs.A minimum of 6 inches of asphalt treated base (ATB) over crushed base material or 8 inches over a good subgrade is recommended to pave the wheel wash. Use a low clearance truck to test the wheel wash before paving. Either a belly dump or lowboy will work well to test clearance. Keep the water level from 12 to 14 inches deep to avoid damage to truck hubs and filling the truck tongues with water. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 274 . BFMs and MBFMs provide good alternatives to blankets in most areas requir- ing vegetation establishment. Advantages over blankets include: . BFM and MBFMs do not require surface preparation. . Helicopters can assist in installing BFM and MBFMs in remote areas. . On slopes steeper than 2.5H:1V, blanket installers may require ropes and harnesses for safety. . Installing BFM and MBFMs can save at least$1,000 per acre com- pared to blankets. Maintenance Standards Reseed any seeded areas that fail to establish at least 80 percent cover(100 percent cover for areas that receive sheet or concentrated flows). If reseeding is ineffective, use an alternate method such as sodding, mulching, or nets/blankets. If winter weather pre- vents adequate grass growth, this time limit may be relaxed at the discretion of the local authority when sensitive areas would otherwise be protected. . Reseed and protect by mulch any areas that experience erosion after achieving adequate cover. Reseed and protect by mulch any eroded area. . Supply seeded areas with adequate moisture, but do not water to the extent that it causes runoff. Approved as Equivalent Ecology has approved products as able to meet the requirements of BMP C120: Tem- porary and Permanent Seeding. The products did not pass through the Technology Assessment Protocol — Ecology (TAPE) process. Local jurisdictions may choose not to accept this product approved as equivalent, or may require additional testing prior to con- sideration for local use. The products are available for review on Ecology's website at http://www.ecy.wa.gov/programs/wq/stormwater/newtech/equivalent.html. BMP C121: Mulching Purpose Mulching soils provides immediate temporary protection from erosion. Mulch also enhances plant establishment by conserving moisture, holding fertilizer, seed, and top- soil in place, and moderating soil temperatures. There is an enormous variety of mulches that can be used. This section discusses only the most common types of mulch. Conditions of Use As a temporary cover measure, mulch should be used: 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 284 . For less than 30 days on disturbed areas that require cover. . At all times for seeded areas, especially during the wet season and during the hot summer months. . During the wet season on slopes steeper than 3H:1 V with more than 10 feet of ver- tical relief. Mulch may be applied at any time of the year and must be refreshed periodically. . For seeded areas mulch may be made up of 100 percent: cottonseed meal; fibers made of wood, recycled cellulose, hemp, kenaf; compost; or blends of these. Tack- ifier shall be plant-based, such as guar or alpha plantago, or chemical-based such as polyacrylamide or polymers.Any mulch or tackifier product used shall be installed per manufacturer's instructions. Generally, mulches come in 40-50 pound bags. Seed and fertilizer are added at time of application. Design and Installation Specifications For mulch materials, application rates, and specifications, see Table 11-4.1.8 Mulch Standards and Guidelines (p.286). Always use a 2-inch minimum mulch thickness; increase the thickness until the ground is 95% covered (i.e. not visible under the mulch layer). Note: Thickness may be increased for disturbed areas in or near sensitive areas or other areas highly susceptible to erosion. Where the option of"Compost" is selected, it should be a coarse compost that meets the following size gradations when tested in accordance with the U.S. Composting Council "Test Methods for the Examination of Compost and Composting" (TMECC) Test Method 02.02-B. Coarse Compost Minimum Percent passing 3" sieve openings 100% Minimum Percent passing 1" sieve openings 90% Minimum Percent passing 3/4" sieve openings 70% Minimum Percent passing '/4" sieve openings 40% Mulch used within the ordinary high-water mark of surface waters should be selected to minimize potential flotation of organic matter. Composted organic materials have higher specific gravities (densities) than straw, wood, or chipped material. Consult Hydraulic Permit Authority (HPA) for mulch mixes if applicable. Maintenance Standards . The thickness of the cover must be maintained. . Any areas that experience erosion shall be remulched and/or protected with a net 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 285 or blanket. If the erosion problem is drainage related, then the problem shall be fixed and the eroded area remulched. Table 11-4.1.8 Mulch Standards and Guidelines Mulch Quality Application Material Standards Rates Remarks. Cost-effective protection when applied with adequate thickness. Hand-application generally requires greater thickness than blown straw. The thickness of straw may be reduced by half when used in conjunction with seeding. In windy areas Air-dried; „ „ straw must be held in place by crimping, using a free from 2 -3 thick; tackifier, or covering with netting. Blown straw undesirable 5 bales per always has to be held in place with a tackifier as Straw seed and , sf or even light winds will blow it away. Straw, how- coarse 2-3 tons per ever, has several deficiencies that should be con- material. acre sidered when selecting mulch materials. It often introduces and/or encourages the propagation of weed species and it has no significant long-term benefits It should also not be used within the ordinary high-water elevation of surface waters (due to flotation). Approx. 25- Shall be applied with hydromulcher. Shall not be No growth 30 lbs per used without seed and tackifier unless the applic- Hydromulch inhibiting 1,000 sf or ation rate is at least doubled. Fibers longer than factors. 1,500 - about 3/4 - 1 inch clog hydromulch equipment. 2,000 lbs Fibers should be kept to less than 3/4 inch. per acre No visible water or More effective control can be obtained by increas- dust during ing thickness to 3". Excellent mulch for protecting handling. 2" thick final grades until landscaping because it can be Must be pro-min.; directly seeded or tilled into soil as an amend- duced per approx. 100 ment. Compost used for mulch has a coarser size Compost WAC 173- tons per gradation than compost used for BMP C125: Top- 350, Solid acre soiling /Composting (p.297) or BMP T5.13: Post- Waste (approx. Construction Soil Quality and Depth (p.911). It is Handling 800 lbs per more stable and practical to use in wet areas and Standards, yard) during rainy weather conditions. Do not use near but may wetlands or near phosphorous impaired water have up to bodies. 35% 2014 Stormwater Management Manual for Western Washington Volume 11- Chapter 4 - Page 286 Table 11-4.1.8 Mulch Standards and Guidelines (continued) Mulch Quality Application Material Standards Rates Remarks biosolids. Average size shall This is a cost-effective way to dispose of debris be several from clearing and grubbing, and it eliminates the inches. problems associated with burning. Generally, it Chipped Gradations should not be used on slopes above approx. 10%Site Veget- from fines 2" thick because of its tendency to be transported by run- to 6 inches min.; off. It is not recommended within 200 feet of sur- ation in length for face waters. If seeding is expected shortly after texture, vari- mulch, the decomposition of the chipped veget- ation, and ation may tie up nutrients important to grass estab- interlocking lishment. properties. No visible water or dust during handling. This material is often called "hog or hogged fuel". Must be pur-2" thick The use of mulch ultimately improves the organic chased min.; Wood- from a su approx. 100 matter in the soil. Special caution is advised based p pp regarding the source and composition of wood- Mulch or wood- plier with a tons per based mulches. Its preparation typically does not Wood Solid acre provide any weed seed control, so evidence of Straw Waste (approx. residual vegetation in its composition or known Handling 800 lbs. per inclusion of weed plants or seeds should be mon- Permit or cubic yard) itored and prevented (or minimized). one exempt from solid waste reg- ulations. A blend of Cost-effective protection when applied with loose, long, adequate thickness. A minimum of 95-percent of thin wood the wood strand shall have lengths between 2 Wood pieces and 10-inches, with a width and thickness Strand derived 2" thick min. between 1/16 and 3/8-inches. The mulch shall not Mulch from native contain resin, tannin, or other compounds in conifer or quantities that would be detrimental to plant life. deciduous Sawdust or wood shavings shall not be used as trees with mulch. (WSDOT specification (9-14.4(4)) 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 287 Table 11-4.1.8 Mulch Standards and Guidelines (continued) Mulch Quality Application Material Standards Rates Remarks high length- to-width ratio. BMP C122: Nets and lankets Purpose Erosion control nets and blankets are intended to prevent erosion and hold seed and mulch in place on steep slopes and in channels so that vegetation can become well established. In addition, some nets and blankets can be used to permanently reinforce turf to protect drainage ways during high flows. Nets (commonly called matting) are strands of material woven into an open, but high-tensile strength net(for example, coconut fiber matting). Blankets are strands of material that are not tightly woven, but instead form a layer of interlocking fibers, typically held together by a biodegradable or photodegradable netting (for example, excelsior or straw blankets). They generally have lower tensile strength than nets, but cover the ground more completely. Coir (coconut fiber) fabric comes as both nets and blankets. Conditions of Use Erosion control nets and blankets should be used: . To aid permanent vegetated stabilization of slopes 2H:1V or greater and with more than 10 feet of vertical relief. . For drainage ditches and swales (highly recommended). The application of appro- priate netting or blanket to drainage ditches and swales can protect bare soil from channelized runoff while vegetation is established. Nets and blankets also can cap- ture a great deal of sediment due to their open, porous structure. Nets and blankets can be used to permanently stabilize channels and may provide a cost-effective, environmentally preferable alternative to riprap. 100 percent synthetic blankets manufactured for use in ditches may be easily reused as temporary ditch liners. Disadvantages of blankets include: . Surface preparation required. . On slopes steeper than 2.5H:1V, blanket installers may need to be roped and har- nessed for safety. . They cost at least$4,000-6,000 per acre installed. Advantages of blankets include: 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 288 Table 11-4.1 Mulch Standards and Guidelines (continued) Mulch Quality Application Remarks Material Standards Rates high length- to-width ratio. BMP C122: Nets and Blankets Purpose Erosion control nets and blankets are intended to prevent erosion and hold seed and mulch in place on steep slopes and in channels so that vegetation can become well established. In addition, some nets and blankets can be used to permanently reinforce turf to protect drainage ways during high flows. Nets (commonly called matting) are strands of material woven into an open, but high-tensile strength net(for example, coconut fiber matting). Blankets are strands of material that are not tightly woven, but instead form a layer of interlocking fibers, typically held together by a biodegradable or photodegradable netting (for example, excelsior or straw blankets). They generally have lower tensile strength than nets, but cover the ground more completely. Coir(coconut fiber) fabric comes as both nets and blankets. Conditions of Use Erosion control nets and blankets should be used: . To aid permanent vegetated stabilization of slopes 2H:1 V or greater and with more than 10 feet of vertical relief. . For drainage ditches and swales (highly recommended). The application of appro- priate netting or blanket to drainage ditches and swales can protect bare soil from channelized runoff while vegetation is established. Nets and blankets also can cap- ture a great deal of sediment due to their open, porous structure. Nets and blankets can be used to permanently stabilize channels and may provide a cost-effective, environmentally preferable alternative to riprap. 100 percent synthetic blankets manufactured for use in ditches may be easily reused as temporary ditch liners. Disadvantages of blankets include: . Surface preparation required. . On slopes steeper than 2.5H:1 V, blanket installers may need to be roped and har- nessed for safety. . They cost at least$4,000-6,000 per acre installed. Advantages of blankets include: 2014 Stormwater Management Manual for Western Washington Volume 11- Chapter 4-Page 288 . Installation without mobilizing special equipment. . Installation by anyone with minimal training . Installation in stages or phases as the project progresses. . Installers can hand place seed and fertilizer as they progress down the slope. . Installation in any weather. . There are numerous types of blankets that can be designed with various para- meters in mind. Those parameters include: fiber blend, mesh strength, longevity, biodegradability, cost, and availability. Design and Installation Specifications . See Figure 11-4.1.3 Channel Installation (p.292) and Figure 11-4.1.4 Slope Install- ation (p.293) for typical orientation and installation of blankets used in channels and as slope protection. Note: these are typical only; all blankets must be installed per manufacturer's installation instructions. . Installation is critical to the effectiveness of these products. If good ground contact is not achieved, runoff can concentrate under the product, resulting in significant erosion. . Installation of Blankets on Slopes: 1. Complete final grade and track walk up and down the slope. 2. Install hydromulch with seed and fertilizer. 3. Dig a small trench, approximately 12 inches wide by 6 inches deep along the top of the slope. 4. Install the leading edge of the blanket into the small trench and staple approx- imately every 18 inches. NOTE: Staples are metal, "U"-shaped, and a min- imum of 6 inches long. Longer staples are used in sandy soils. Biodegradable stakes are also available. 5. Roll the blanket slowly down the slope as installer walks backwards. NOTE: The blanket rests against the installer's legs. Staples are installed as the blanket is unrolled. It is critical that the proper staple pattern is used for the blanket being installed. The blanket is not to be allowed to roll down the slope on its own as this stretches the blanket making it impossible to main- tain soil contact. In addition, no one is allowed to walk on the blanket after it is in place. 6. If the blanket is not long enough to cover the entire slope length, the trailing edge of the upper blanket should overlap the leading edge of the lower 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 289 blanket and be stapled. On steeper slopes, this overlap should be installed in a small trench, stapled, and covered with soil. . With the variety of products available, it is impossible to cover all the details of appropriate use and installation. Therefore, it is critical that the design engineer consult the manufacturer's information and that a site visit takes place in order to ensure that the product specified is appropriate. Information is also available at the following web sites: 1. WSDOT (Section 3.2.4): http://www.wsdot.wa.gov/N R/rdonlyres/3B41 E087-FA86-4717-932D- D7A8556CC D57/0/ErosionTrainingManual.pdf 2. Texas Transportation Institute: http://www.txdot.gov/business/doing_business/product evaluation/erosion_ control.htm . Use jute matting in conjunction with mulch (BMP C121: Mulching (p.284)). Excel- sior, woven straw blankets and coir(coconut fiber) blankets may be installed without mulch. There are many other types of erosion control nets and blankets on the market that may be appropriate in certain circumstances. . In general, most nets (e.g.,jute matting) require mulch in order to prevent erosion because they have a fairly open structure. Blankets typically do not require mulch because they usually provide complete protection of the surface. . Extremely steep, unstable, wet, or rocky slopes are often appropriate candidates for use of synthetic blankets, as are riverbanks, beaches and other high-energy environments. If synthetic blankets are used, the soil should be hydromulched first. . 100-percent biodegradable blankets are available for use in sensitive areas. These organic blankets are usually held together with a paper or fiber mesh and stitching which may last up to a year. . Most netting used with blankets is photodegradable, meaning they break down under sunlight(not UV stabilized). However, this process can take months or years even under bright sun. Once vegetation is established, sunlight does not reach the mesh. It is not uncommon to find non-degraded netting still in place several years after installation. This can be a problem if maintenance requires the use of mowers or ditch cleaning equipment. In addition, birds and small animals can become trapped in the netting. Maintenance Standards . Maintain good contact with the ground. Erosion must not occur beneath the net or blanket. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 290 . Repair and staple any areas of the net or blanket that are damaged or not in close contact with the ground. . Fix and protect eroded areas if erosion occurs due to poorly controlled drainage. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4-Page 291 Figure 11-4.1.3 Channel Installation NOT TO SCALE .--•!''''' '. ..;-gagia OV r • / I 1_/4 // / //\/•_..IOI• \// / // / LONGITUDINAL ANCHOR TRENCH TERMINAL SLOPE AND CHANNEL ANCHOR TRENCH Irtreffr Y STAKE AT Y-5 `+ IV ',4r' INTERVALS. + . rJ : ;'l: �r r r t- r +4 r �E r :.'s4.1 °'l.' ac r 0 ,.r r /r r�� ///% CHECKSLOT AT 25' NTER • r //�//�j\/ ISOMETRIC VIEW c..,......, Ai. \Ai lir ... ... 0. j\j�\/�\/ :.._;v: �,\\/ \....j\i*n_. .////\//\:: '', iz//i „/ . \/1� \/\/\'\6.\ \\/\/\ INITIAL CHANNEL ANCHOR TRENCH INTERMITTENT CHECK SLOT Source:Clackamas County 2009 Notes: Erosion Prevention Planning and 1. Check slots to be constructed per manufacturers specifications. Design Manual 2. Staking or stapling layout per manufacturers specifications. 11■01 Figure 11-4.1 .3 MWMII Channel Installation DEPARTMENT OF Revised June 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyrighthtml for copyright notice including permissions, State of Washington limitation of liability,and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 292 Anchor in 6" x 6" min. trench and staple at 12" intervals t 1 ^� may•,= rC. AIL='.�.' 2"Min. overlap i,a 1-11=1 =111=11 11=11=11=11=1 — .11.i1 11- .11.11.11.11- =11=II= / AI1=11-11= .,.., Y, 411WIf.�ial:- Min. 6" overlap • ual'=i ' .�:�al:�.11 :11.�1111.11,��II II-a : 1�=11. �.! N=1.' 11=1111:zii '�� ~` +' ' '11-11.=ii'r_ Staple overlaps 11=�. .11=11 11.--�R1111 11=1I 11.=11=1IF1 '1MIII=11.=II= max. 5" spacing :.�:=1:1131:1111 1'1111..11=11:11IL=111:=1.!111:= �1:�:�I117 111.*�1.=I -- _ — Bring material down to a level area, turn the end under 4" and staple at 12" intervals Notes: 1. Slope surface shall be smooth before placement for proper soil contact. 2. Stapling pattern as per manufacturer's recommendations. 3. Do not stretch blankets/mattings tight- allow the rolls to mold to any irregularities. 4. For slopes less than 3H:1V, rolls may be placed in horizontal strips. 5. If there is a berm at the top of the slope, anchor upslope of the berm. 6. Lime, fertilize, and seed before installation. Planting of shrubs, trees, etc. should occur after installation. NOT TO SCALE 1113111 1.1110 F d u re V =4 1 o A Dope 0nstlOOatoon DEPARTMENT OF Revised June 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume ll - Chapter 4 o Page 293 MP C123: Plastic Covering Purpose Plastic covering provides immediate, short-term erosion protection to slopes and dis- turbed areas. Conditions of Use Plastic covering may be used on disturbed areas that require cover measures for less than 30 days, except as stated below. . Plastic is particularly useful for protecting cut and fill slopes and stockpiles. Note: The relatively rapid breakdown of most polyethylene sheeting makes it unsuitable for long-term (greater than six months) applications. . Due to rapid runoff caused by plastic covering, do not use this method upslope of areas that might be adversely impacted by concentrated runoff. Such areas include steep and/or unstable slopes. . Plastic sheeting may result in increased runoff volumes and velocities, requiring additional on-site measures to counteract the increases. Creating a trough with wattles or other material can convey clean water away from these areas. . To prevent undercutting, trench and backfill rolled plastic covering products. . While plastic is inexpensive to purchase, the added cost of installation, main- tenance, removal, and disposal make this an expensive material, up to $1.50-2.00 per square yard. . Whenever plastic is used to protect slopes install water collection measures at the base of the slope. These measures include plastic-covered berms, channels, and pipes used to covey clean rainwater away from bare soil and disturbed areas. Do not mix clean runoff from a plastic covered slope with dirty runoff from a project. . Other uses for plastic include: 1. Temporary ditch liner. 2. Pond liner in temporary sediment pond. 3. Liner for bermed temporary fuel storage area if plastic is not reactive to the type of fuel being stored. 4. Emergency slope protection during heavy rains. 5. Temporary drainpipe ("elephant trunk") used to direct water. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 294 Design and Installation Specifications . Plastic slope cover must be installed as follows: 1. Run plastic up and down slope, not across slope. 2. Plastic may be installed perpendicular to a slope if the slope length is less than 10 feet. 3. Minimum of 8-inch overlap at seams. 4. On long or wide slopes, or slopes subject to wind, tape all seams. 5. Place plastic into a small (12-inch wide by 6-inch deep) slot trench at the top of the slope and backfill with soil to keep water from flowing underneath. 6. Place sand filled burlap or geotextile bags every 3 to 6 feet along seams and tie them together with twine to hold them in place. 7. Inspect plastic for rips, tears, and open seams regularly and repair imme- diately. This prevents high velocity runoff from contacting bare soil which causes extreme erosion. 8. Sandbags may be lowered into place tied to ropes. However, all sandbags must be staked in place. . Plastic sheeting shall have a minimum thickness of 0.06 millimeters. . If erosion at the toe of a slope is likely, a gravel berm, riprap, or other suitable pro- tection shall be installed at the toe of the slope in order to reduce the velocity of run- off. Maintenance Standards . Torn sheets must be replaced and open seams repaired. . Completely remove and replace the plastic if it begins to deteriorate due to ultra- violet radiation. . Completely remove plastic when no longer needed. . Dispose of old tires used to weight down plastic sheeting appropriately. Approved as Equivalent Ecology has approved products as able to meet the requirements of BMP C123: Plastic Covering. The products did not pass through the Technology Assessment Protocol — Ecology (TAPE) process. Local jurisdictions may choose not to accept this product approved as equivalent, or may require additional testing prior to consideration for local use. The products are available for review on Ecology's website at http://www.ecy.wa.gov/programs/wq/stormwater/newtech/equivalent.html 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 - Page 295 SNIP C124: Sodding Purpose The purpose of sodding is to establish permanent turf for immediate erosion protection and to stabilize drainage ways where concentrated overland flow will occur. Conditions of Use Sodding may be used in the following areas: . Disturbed areas that require short-term or long-term cover. . Disturbed areas that require immediate vegetative cover. . All waterways that require vegetative lining. Waterways may also be seeded rather than sodded, and protected with a net or blanket. Design and Installation Specifications Sod shall be free of weeds, of uniform thickness (approximately 1-inch thick), and shall have a dense root mat for mechanical strength. The following steps are recommended for sod installation: . Shape and smooth the surface to final grade in accordance with the approved grad- ing plan. The swale needs to be overexcavated 4 to 6 inches below design elev- ation to allow room for placing soil amendment and sod. . Amend 4 inches (minimum) of compost into the top 8 inches of the soil if the organic content of the soil is less than ten percent or the permeability is less than 0.6 inches per hour. See http://www.ecy.wa.gov/programs/swfa/organics/soil.html for further information. . Fertilize according to the supplier's recommendations. . Work lime and fertilizer 1 to 2 inches into the soil, and smooth the surface. . Lay strips of sod beginning at the lowest area to be sodded and perpendicular to the direction of water flow. Wedge strips securely into place. Square the ends of each strip to provide for a close, tight fit. Stagger joints at least 12 inches. Staple on slopes steeper than 3H:1 V. Staple the upstream edge of each sod strip. . Roll the sodded area and irrigate. . When sodding is carried out in alternating strips or other patterns, seed the areas between the sod immediately after sodding. 2014 Stormwater Management Manual for Western Washington Volume 1l- Chapter 4 -Page 296 Maintenance Standards If the grass is unhealthy, the cause shall be determined and appropriate action taken to reestablish a healthy groundcover. If it is impossible to establish a healthy groundcover due to frequent saturation, instability, or some other cause, the sod shall be removed, the area seeded with an appropriate mix, and protected with a net or blanket. BMP C125: Topsoiling / Composting Purpose Topsoiling and composting provide a suitable growth medium for final site stabilization with vegetation. While not a permanent cover practice in itself, topsoiling and corn- posting are an integral component of providing permanent cover in those areas where there is an unsuitable soil surface for plant growth. Use this BMP in conjunction with other BMPs such as seeding, mulching, or sodding. Note that this BMP is functionally the same as BMP T5.13: Post-Construction Soil Quality and Depth (p.911)which is required for all disturbed areas that will be developed as lawn or landscaped areas at the completed project site. Native soils and disturbed soils that have been organically amended not only retain much more sormwater, but they also serve as effective biofilters for urban pollutants and, by supporting more vigorous plant growth, reduce the water, fertilizer and pesticides needed to support installed landscapes. Topsoil does not include any subsoils but only the material from the top several inches including organic debris. Conditions of Use . Permanent landscaped areas shall contain healthy topsoil that reduces the need for fertilizers, improves overall topsoil quality, provides for better vegetal health and vitality, improves hydrologic characteristics, and reduces the need for irrigation. . Leave native soils and the duff layer undisturbed to the maximum extent prac- ticable. Stripping of existing, properly functioning soil system and vegetation for the purpose of topsoiling during construction is not acceptable. Preserve existing soil systems in undisturbed and uncompacted conditions if functioning properly. . Areas that already have good topsoil, such as undisturbed areas, do not require soil amendments. . Restore, to the maximum extent practical, native soils disturbed during clearing and grading to a condition equal to or better than the original site condition's mois- ture-holding capacity. Use on-site native topsoil, incorporate amendments into on- site soil, or import blended topsoil to meet this requirement. . Topsoiling is a required procedure when establishing vegetation on shallow soils, and soils of critically low pH (high acid) levels. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 297 Maintenance Standards If the grass is unhealthy, the cause shall be determined and appropriate action taken to reestablish a healthy groundcover. If it is impossible to establish a healthy groundcover due to frequent saturation, instability, or some other cause, the sod shall be removed, the area seeded with an appropriate mix, and protected with a net or blanket. P C125: Topsoiling / Composting Purpose Topsoiling and composting provide a suitable growth medium for final site stabilization with vegetation. While not a permanent cover practice in itself, topsoiling and com- posting are an integral component of providing permanent cover in those areas where there is an unsuitable soil surface for plant growth. Use this BMP in conjunction with other BMPs such as seeding, mulching, or sodding. Note that this BMP is functionally the same as BMP T5.13: Post-Construction Soil Quality and Depth (p.911)which is required for all disturbed areas that will be developed as lawn or landscaped areas at the completed project site. Native soils and disturbed soils that have been organically amended not only retain much more stormwater, but they also serve as effective biofilters for urban pollutants and, by supporting more vigorous plant growth, reduce the water, fertilizer and pesticides needed to support installed landscapes. Topsoil does not include any subsoils but only the material from the top several inches including organic debris. Conditions of Use . Permanent landscaped areas shall contain healthy topsoil that reduces the need for fertilizers, improves overall topsoil quality, provides for better vegetal health and vitality, improves hydrologic characteristics, and reduces the need for irrigation. . Leave native soils and the duff layer undisturbed to the maximum extent prac- ticable. Stripping of existing, properly functioning soil system and vegetation for the purpose of topsoiling during construction is not acceptable. Preserve existing soil systems in undisturbed and uncompacted conditions if functioning properly. . Areas that already have good topsoil, such as undisturbed areas, do not require soil amendments. . Restore, to the maximum extent practical, native soils disturbed during clearing and grading to a condition equal to or better than the original site condition's mois- ture-holding capacity. Use on-site native topsoil, incorporate amendments into on- site soil, or import blended topsoil to meet this requirement. • Topsoiling is a required procedure when establishing vegetation on shallow soils, and soils of critically low pH (high acid) levels. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 297 . Beware of where the topsoil comes from, and what vegetation was on site before disturbance, invasive plant seeds may be included and could cause problems for establishing native plants, landscaped areas, or grasses. . Topsoil from the site will contain mycorrhizal bacteria that are necessary for healthy root growth and nutrient transfer. These native mycorrhiza are acclimated to the site and will provide optimum conditions for establishing grasses. Use com- mercially available mycorrhiza products when using off-site topsoil. Design and Installation Specifications Meet the following requirements for disturbed areas that will be developed as lawn or landscaped areas at the completed project site: . Maximize the depth of the topsoil wherever possible to provide the maximum pos- sible infiltration capacity and beneficial growth medium. Topsoil shall have: • A minimum depth of 8-inches. Scarify subsoils below the topsoil layer at least 4-inches with some incorporation of the upper material to avoid stratified lay- ers, where feasible. Ripping or re-structuring the subgrade may also provide additional benefits regarding the overall infiltration and interflow dynamics of the soil system. o A minimum organic content of 10% dry weight in planting beds, and 5% organic matter content in turf areas. Incorporate organic amendments to a minimum 8-inch depth except where tree roots or other natural features limit the depth of incorporation. o A pH between 6.0 and 8.0 or matching the pH of the undisturbed soil. • If blended topsoil is imported, then fines should be limited to 25 percent passing through a 200 sieve. • Mulch planting beds with 2 inches of organic material . Accomplish the required organic content, depth, and pH by returning native topsoil to the site, importing topsoil of sufficient organic content, and/or incorporating organic amendments. When using the option of incorporating amendments to meet the organic content requirement, use compost that meets the compost specification for Bioretention (See BMP T7.30: Bioretention Cells, Swales, and Planter Boxes (p.959)), with the exception that the compost may have up to 35% biosolids or manure. . Sections three through seven of the document entitled, Guidelines and Resources for Implementing Soil Quality and Depth BMP T5.13 in WDOE Stormwater Man- agement Manual for Western Washington, provides useful guidance for imple- menting whichever option is chosen. It includes guidance for pre-approved default strategies and guidance for custom strategies. Check with your local jurisdiction 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 298 concerning its acceptance of this guidance. It is available through the organization, Soils for Salmon.As of this printing the document may be found at: http://www.soils- forsalmon.orq/pdf/Soil BMP Manual.pdf. . The final composition and construction of the soil system will result in a natural selection or favoring of certain plant species over time. For example, incorporation of topsoil may favor grasses, while layering with mildly acidic, high-carbon amend- ments may favor more woody vegetation. . Allow sufficient time in scheduling for topsoil spreading prior to seeding, sodding, or planting. . Take care when applying top soil to subsoils with contrasting textures. Sandy top- soil over clayey subsoil is a particularly poor combination, as water creeps along the junction between the soil layers and causes the topsoil to slough. If topsoil and subsoil are not properly bonded, water will not infiltrate the soil profile evenly and it will be difficult to establish vegetation. The best method to prevent a lack of bond- ing is to actually work the topsoil into the layer below for a depth of at least 6 inches. . Field exploration of the site shall be made to determine if there is surface soil of suf- ficient quantity and quality to justify stripping. Topsoil shall be friable and loamy (loam, sandy loam, silt loam, sandy clay loam, and clay loam).Avoid areas of nat- ural ground water recharge. . Stripping shall be confined to the immediate construction area.A 4-inch to 6-inch stripping depth is common, but depth may vary depending on the particular soil. All surface runoff control structures shall be in place prior to stripping. . Do not place topsoil while in a frozen or muddy condition, when the subgrade is excessively wet, or when conditions exist that may otherwise be detrimental to proper grading or proposed sodding or seeding. . In any areas requiring grading remove and stockpile the duff layer and topsoil on site in a designated, controlled area, not adjacent to public resources and critical areas. Stockpiled topsoil is to be reapplied to other portions of the site where feas- ible. . Locate the topsoil stockpile so that it meets specifications and does not interfere with work on the site. It may be possible to locate more than one pile in proximity to areas where topsoil will be used. Stockpiling of topsoil shall occur in the following manner: . Side slopes of the stockpile shall not exceed 2H:1 V. . Between October 1 and April 30: 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4-Page 299 . An interceptor dike with gravel outlet and silt fence shall surround all topsoil. • Within 2 days complete erosion control seeding, or covering stockpiles with clear plastic, or other mulching materials. . Between May 1 and September 30: . An interceptor dike with gravel outlet and silt fence shall surround all topsoil if the stockpile will remain in place for a longer period of time than active construction grading. • Within 7 days complete erosion control seeding, or covering stockpiles with clear plastic, or other mulching materials. . When native topsoil is to be stockpiled and reused the following should apply to ensure that the mycorrhizal bacterial, earthworms, and other beneficial organisms will not be destroyed: 1. Re-install topsoil within 4 to 6 weeks. 2. Do not allow the saturation of topsoil with water. 3. Do not use plastic covering. Maintenance Standards . Inspect stockpiles regularly, especially after large storm events. Stabilize any areas that have eroded. . Establish soil quality and depth toward the end of construction and once estab- lished, protect from compaction, such as from large machinery use, and from erosion. . Plant and mulch soil after installation. . Leave plant debris or its equivalent on the soil surface to replenish organic matter. . Reduce and adjust, where possible, the use of irrigation, fertilizers, herbicides and pesticides, rather than continuing to implement formerly established practices. BMP C126: Polyacrylamide (PAM) for Soil Erosion Protection Purpose Polyacrylamide (PAM) is used on construction sites to prevent soil erosion. Applying PAM to bare soil in advance of a rain event significantly reduces erosion and controls sediment in two ways. First, PAM increases the soil's available pore volume, 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4- Page 300 MP C140: Dust Control Purpose Dust control prevents wind transport of dust from disturbed soil surfaces onto roadways, drainage ways, and surface waters. Conditions of Use . In areas (including roadways) subject to surface and air movement of dust where on-site and off site impacts to roadways, drainage ways, or surface waters are likely. Design and Installation Specifications . Vegetate or mulch areas that will not receive vehicle traffic. In areas where plant- ing, mulching, or paving is impractical, apply gravel or landscaping rock. . Limit dust generation by clearing only those areas where immediate activity will take place, leaving the remaining area(s) in the original condition. Maintain the ori- ginal ground cover as long as practical. . Construct natural or artificial windbreaks or windscreens. These may be designed as enclosures for small dust sources. . Sprinkle the site with water until surface is wet. Repeat as needed. To prevent carryout of mud onto street, refer to BMP C 105: Stabilized Construction Entrance / Exit(p.270). . Irrigation water can be used for dust control. Irrigation systems should be installed as a first step on sites where dust control is a concern. . Spray exposed soil areas with a dust palliative, following the manufacturer's instructions and cautions regarding handling and application. Used oil is pro- hibited from use as a dust suppressant. Local governments may approve other dust palliatives such as calcium chloride or PAM. . PAM (BMP C126: Polyacrylamide (PAM) for Soil Erosion Protection (p.300)) added to water at a rate of 0.5 lbs. per 1,000 gallons of water per acre and applied from a water truck is more effective than water alone. This is due to increased infilt- ration of water into the soil and reduced evaporation. In addition, small soil particles are bonded together and are not as easily transported by wind.Adding PAM may actually reduce the quantity of water needed for dust control. Use of PAM could be a cost-effective dust control method. Techniques that can be used for unpaved roads and lots include: 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 310 . Lower speed limits. High vehicle speed increases the amount of dust stirred up from unpaved roads and lots. . Upgrade the road surface strength by improving particle size, shape, and mineral types that make up the surface and base materials. . Add surface gravel to reduce the source of dust emission. Limit the amount of fine particles (those smaller than .075 mm)to 10 to 20 percent. . Use geotextile fabrics to increase the strength of new roads or roads undergoing reconstruction. • Encourage the use of alternate, paved routes, if available. . Restrict use of paved roadways by tracked vehicles and heavy trucks to prevent damage to road surface and base. . Apply chemical dust suppressants using the admix method, blending the product with the top few inches of surface material. Suppressants may also be applied as surface treatments. . Pave unpaved permanent roads and other trafficked areas. • Use vacuum street sweepers. . Remove mud and other dirt promptly so it does not dry and then turn into dust. . Limit dust-causing work on windy days. . Contact your local Air Pollution Control Authority for guidance and training on other dust control measures. Compliance with the local Air Pollution Control Authority constitutes compliance with this BMP. Maintenance Standards Respray area as necessary to keep dust to a minimum. BMP C150: Materials on Hand Purpose Keep quantities of erosion prevention and sediment control materials on the project site at all times to be used for regular maintenance and emergency situations such as unex- pected heavy summer rains. Having these materials on-site reduces the time needed to implement BMPs when inspections indicate that existing BMPs are not meeting the Con- struction SWPPP requirements. In addition, contractors can save money by buying some materials in bulk and storing them at their office or yard. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 - Page 311 BMP C207: Check Dams Purpose Construction of small dams across a swale or ditch reduces the velocity of concentrated flow and dissipates energy at the check dam. Conditions of Use Where temporary channels or permanent channels are not yet vegetated, channel lining is infeasible, and/or velocity checks are required. . Check dams may not be placed in streams unless approved by the State Depart- ment of Fish and Wildlife. Check dams may not be placed in wetlands without approval from a permitting agency. . Do not place check dams below the expected backwater from any salmonid bear- ing water between October 1 and May 31 to ensure that there is no loss of high flow refuge habitat for overwintering juvenile salmonids and emergent salmonid fry. . Construct rock check dams from appropriately sized rock. The rock used must be large enough to stay in place given the expected design flow through the channel. The rock must be placed by hand or by mechanical means (no dumping of rock to form dam) to achieve complete coverage of the ditch or swale and to ensure that the center of the dam is lower than the edges. . Check dams may also be constructed of either rock or pea-gravel filled bags. Numerous new products are also available for this purpose. They tend to be re- usable, quick and easy to install, effective, and cost efficient. . Place check dams perpendicular to the flow of water. . The dam should form a triangle when viewed from the side. This prevents under- cutting as water flows over the face of the dam rather than falling directly onto the ditch bottom. . Before installing check dams impound and bypass upstream water flow away from the work area. Options for bypassing include pumps, siphons, or temporary chan- nels. . Check dams in association with sumps work more effectively at slowing flow and retaining sediment than just a check dam alone. A deep sump should be provided immediately upstream of the check dam. . In some cases, if carefully located and designed, check dams can remain as per- manent installations with very minor regrading. They may be left as either spill- ways, in which case accumulated sediment would be graded and seeded, or as 2014 Stormwater Management Manual for Western Washington Volume Il- Chapter 4 - Page 352 check dams to prevent further sediment from leaving the site. . The maximum spacing between the dams shall be such that the toe of the upstream dam is at the same elevation as the top of the downstream dam. . Keep the maximum height at 2 feet at the center of the dam. . Keep the center of the check dam at least 12 inches lower than the outer edges at natural ground elevation. . Keep the side slopes of the check dam at 2H:1V or flatter. . Key the stone into the ditch banks and extend it beyond the abutments a minimum of 18 inches to avoid washouts from overflow around the dam. . Use filter fabric foundation under a rock or sand bag check dam. If a blanket ditch liner is used, filter fabric is not necessary.A piece of organic or synthetic blanket cut to fit will also work for this purpose. . In the case of grass-lined ditches and swales, all check dams and accumulated sediment shall be removed when the grass has matured sufficiently to protect the ditch or swale - unless the slope of the swale is greater than 4 percent. The area beneath the check dams shall be seeded and mulched immediately after dam removal. . Ensure that channel appurtenances, such as culvert entrances below check dams, are not subject to damage or blockage from displaced stones. Figure II-4.2.7 Rock Check Dam (p.354) depicts a typical rock check dam. Maintenance Standards Check dams shall be monitored for performance and sediment accumulation during and after each runoff producing rainfall. Sediment shall be removed when it reaches one half the sump depth. . Anticipate submergence and deposition above the check dam and erosion from high flows around the edges of the dam. . If significant erosion occurs between dams, install a protective riprap liner in that portion of the channel. Approved as Equivalent Ecology has approved products as able to meet the requirements of BMP C207: Check Dams. The products did not pass through the Technology Assessment Protocol —Eco- logy (TAPE) process. Local jurisdictions may choose not to accept this product approved as equivalent, or may require additional testing prior to consideration for local use. The products are available for review on Ecology's website at http://www.ecy.wa.gov- /programs/wq/stormwater/newtech/equivalent.html 2014 Stormwater Management Manual for Western Washington Volume 11- Chapter 4 -Page 353 Figure 11-4.2.7 Rock Check Dam View Looking Upstream A 18„ 12" (0.5m) y7 (150mm) /•/ ,N.o c4j,44j� as QQ /.://A%24• "(0.6m) Note: Key stone into channel banks and extend it / / / / beyond the abutments a minimum of 18" \� \\\/�\ (0.5m)to prevent flow around dam. q Section A-A I Flow __ 24"(0.6m) • o \\•\\//, •/ j\\//\/\// 8'(2.4m) Spacing Between Check Dams 'L'=the distance such that points 'A'and'B'are of equal elevation. qs� o Point'A' Point'B' //\\yJ‘y>/1,.. \/k /\//\/ / , NOT TO SCALE 0111M11 Figure 11-4.2.7 Rock Check Dam DEPARTMENT OF Revised July 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability,and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 354 1. If the discharge velocity at the outlet is less than 5 fps (pipe slope less than 1 percent), use 2-inch to 8-inch riprap. Minimum thickness is 1-foot. 2. For 5 to 10 fps discharge velocity at the outlet(pipe slope less than 3 per- cent), use 24-inch to 48-inch riprap. Minimum thickness is 2 feet. 3. For outlets at the base of steep slope pipes (pipe slope greater than 10 per- cent), an engineered energy dissipater shall be used. . Filter fabric or erosion control blankets should always be used under riprap to pre- vent scour and channel erosion. . New pipe outfalls can provide an opportunity for low-cost fish habitat improve- ments. For example, an alcove of low-velocity water can be created by con- structing the pipe outfall and associated energy dissipater back from the stream edge and digging a channel, over-widened to the upstream side, from the outfall. Overwintering juvenile and migrating adult salmonids may use the alcove as shel- ter during high flows. Bank stabilization, bioengineering, and habitat features may be required for disturbed areas. This work may require a HPA. See Volume V (p.765) for more information on outfall system design. Maintenance Standards . Inspect and repair as needed. . Add rock as needed to maintain the intended function. • Clean energy dissipater if sediment builds up. allAP C220: Storm Drain Inlet Protection Purpose Storm drain inlet protection prevents coarse sediment from entering drainage systems prior to permanent stabilization of the disturbed area. Conditions of Use Use storm drain inlet protection at inlets that are operational before permanent sta- bilization of the disturbed drainage area. Provide protection for all storm drain inlets downslope and within 500 feet of a disturbed or construction area, unless conveying run- off entering catch basins to a sediment pond or trap. Also consider inlet protection for lawn and yard drains on new home construction. These small and numerous drains coupled with lack of gutters in new home construction can add significant amounts of sediment into the roof drain system. If possible delay installing lawn and yard drains until just before landscaping or cap these drains to pre- 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 357 vent sediment from entering the system until completion of landscaping. Provide 18- inches of sod around each finished lawn and yard drain. Table 11-4.2.2 Storm Drain Inlet Protection (p.358) lists several options for inlet protection. All of the methods for storm drain inlet protection tend to plug and require a high fre- quency of maintenance. Limit drainage areas to one acre or less. Possibly provide emer- gency overflows with additional end-of-pipe treatment where stormwater ponding would cause a hazard. Table 11-4.2.2 Storm Drain Inlet Protection Applicable for Type of Inlet Emergency Paved/Earthen Conditions of Use Protection Overflow Surfaces Drop Inlet Protection Excavated drop Yes, tern- Applicable for heavy flows. Easy inlet protection porary flood- Earthen to maintain. Large area Require- ing will occur ment: 301x30'/acre Block and gravel drop inlet Yes Paved or Earthen Applicable for heavy concentrated flows. Will not pond. protection Gravel and wire Applicable for heavy concentrated drop inlet pro- No flows. Will pond. Can withstand tection traffic. Catch basin fil- Yes Paved or Earthen Frequent Maintenance required. ters Curb Inlet Protection Curb inlet pro- Small capacity Used for sturdy, more compact tection with overflow Paved installation. wooden weir Block and gravel curb inlet Yes Paved Sturdy, but limited filtration. protection Culvert Inlet Protection Culvert inlet Sed- 18 month expected life. iment trap Design and Installation Specifications Excavated Drop Inlet Protection-An excavated impoundment around the storm drain. Sediment settles out of the stormwater prior to entering the storm drain. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 358 . Provide a depth of 1-2 ft as measured from the crest of the inlet structure. . Slope sides of excavation no steeper than 2H:1V. . Minimum volume of excavation 35 cubic yards. . Shape basin to fit site with longest dimension oriented toward the longest inflow area. . Install provisions for draining to prevent standing water problems. . Clear the area of all debris. . Grade the approach to the inlet uniformly. . Drill weep holes into the side of the inlet. . Protect weep holes with screen wire and washed aggregate. . Seal weep holes when removing structure and stabilizing area. . Build a temporary dike, if necessary, to the down slope side of the structure to pre- vent bypass flow. Block and Gravel Filter-A barrier formed around the storm drain inlet with standard con- crete blocks and gravel. See Figure 11-4.2.8 Block and Gravel Filter(p.360). . Provide a height of 1 to 2 feet above inlet. . Recess the first row 2-inches into the ground for stability. . Support subsequent courses by placing a 2x4 through the block opening. . Do not use mortar. . Lay some blocks in the bottom row on their side for dewatering the pool. . Place hardware cloth or comparable wire mesh with 1-inch openings over all block openings. . Place gravel just below the top of blocks on slopes of 2H:1V or flatter. . An alternative design is a gravel donut. . Provide an inlet slope of 3H:1 V. . Provide an outlet slope of 2H:1V. . Provide a1-foot wide level stone area between the structure and the inlet. . Use inlet slope stones 3 inches in diameter or larger. . Use gravel '/z-to 3/-inch at a minimum thickness of 1-foot for the outlet slope. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 359 s'dp)Nil e [ _- o o 3 [3 ©cc L.,c 61 En(gi r9 U tasv Li- a Drain grate 0 o tJ" Ja7\1 r.oh (-) - .c -60 Y'' 'Poq° Concrete block , a • GJ �o) �° . ,° uo r °C)!I £ • c�.� ,W .• '`/ate d ,Q G �`, t.,� r)* J°c,,_1,��� Gravel backfill ?a4 Plan View Concrete block Wire screen or filter fabric Gravel backfill _0_Overflow water `' Ponding height ` ,`f c Q Water FiTTlIiI- 2,••)0Q.A 3"' 0(C--.rl. � .-, '/ a'L ‘‘‘‘‘N %�4I4I4U'//.N I,f �N• . ., c ,\ ors: \ j i . ��...\ / \/"'\/�, \f`�/;ter`\ � // ���� j� Drop inlet j�%�/ j Section A-A Notes: 1. Drop inlet sediment barriers are to be used for small, nearly level drainage areas. (less than 5%) 2. Excavate a basin of sufficient size adjacent to the drop inlet. 3. The top of the structure (ponding height) must be well below the ground elevation downslope to prevent runoff from bypassing the inlet. A temporary dike may be necessary on the downslope side of the structure. NOT TO SCALE . iii Figure 1 .-4.2 . 8 NWII : lock and Gravel H ter DEPARTMENT OF Revised August 2015 F C 0 L ,e G Y Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume ll - Chapter 4 - Page 360 Gravel and Wire Mesh Filter-A gravel barrier placed over the top of the inlet. This struc- ture does not provide an overflow. . Use a hardware cloth or comparable wire mesh with 1A2-inch openings. . Use coarse aggregate. . Provide a height 1-foot or more, 18-inches wider than inlet on all sides. . Place wire mesh over the drop inlet so that the wire extends a minimum of 1-foot beyond each side of the inlet structure. . Overlap the strips if more than one strip of mesh is necessary. . Place coarse aggregate over the wire mesh. . Provide at least a 12-inch depth of gravel over the entire inlet opening and extend at least 18-inches on all sides. Catchbasin Filters— Use inserts designed by manufacturers for construction sites. The limited sediment storage capacity increases the amount of inspection and maintenance required, which may be daily for heavy sediment loads. To reduce maintenance require- ments combine a catchbasin filter with another type of inlet protection. This type of inlet protection provides flow bypass without overflow and therefore may be a better method for inlets located along active rights-of-way. . Provides 5 cubic feet of storage. . Requires dewatering provisions. . Provides a high-flow bypass that will not clog under normal use at a construction site. . Insert the catchbasin filter in the catchbasin just below the grating. Curb Inlet Protection with Wooden Weir— Barrier formed around a curb inlet with a wooden frame and gravel. . Use wire mesh with '/2-inch openings. . Use extra strength filter cloth. . Construct a frame. . Attach the wire and filter fabric to the frame. . Pile coarse washed aggregate against wire/fabric. . Place weight on frame anchors. Block and Gravel Curb Inlet Protection— Barrier formed around a curb inlet with concrete blocks and gravel. See Figure 11-4.2.9 Block and Gravel Curb Inlet Protection (p.363). 2014 Stormwater Management Manual for Western Washington Volume 11- Chapter 4 - Page 361 . Use wire mesh with 1/2-inch openings. . Place two concrete blocks on their sides abutting the curb at either side of the inlet opening. These are spacer blocks. . Place a 2x4 stud through the outer holes of each spacer block to align the front blocks. . Place blocks on their sides across the front of the inlet and abutting the spacer blocks. . Place wire mesh over the outside vertical face. . Pile coarse aggregate against the wire to the top of the barrier. Curb and Gutter Sediment Barrier—Sandbag or rock berm (riprap and aggregate) 3 feet high and 3 feet wide in a horseshoe shape. See Figure 11-4.2.10 Curb and Gutter Barrier (p.364). . Construct a horseshoe shaped berm, faced with coarse aggregate if using riprap, 3 feet high and 3 feet wide, at least 2 feet from the inlet. . Construct a horseshoe shaped sedimentation trap on the outside of the berm sized to sediment trap standards for protecting a culvert inlet. Maintenance Standards . Inspect catch basin filters frequently, especially after storm events. Clean and replace clogged inserts. For systems with clogged stone filters: pull away the stones from the inlet and clean or replace. An alternative approach would be to use the clogged stone as fill and put fresh stone around the inlet. . Do not wash sediment into storm drains while cleaning. Spread all excavated material evenly over the surrounding land area or stockpile and stabilize as appro- priate. Approved as Equivalent Ecology has approved products as able to meet the requirements of BMP C220: Storm Drain Inlet Protection. The products did not pass through the Technology Assessment Protocol — Ecology (TAPE) process. Local jurisdictions may choose not to accept this product approved as equivalent, or may require additional testing prior to consideration for local use. The products are available for review on Ecology's website at http://www.ecy.wa.gov/prog rams/wq/stormwater/newtech/equivalent.html 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 - Page 362 LO-41,02,9Koch c radi aravoi Cunt Unk4 Privtimegio n A Catch basin Back of sidewalk 2x4 Wood stud Back of curb —\44, Curb inlet Concrete block ty rt,a. S*ii Ly-4. Wire screen or s.°'�?I!___ va 9 ® 3/4 inch (20 mm) Concrete block Drain gravel Plan View Ponding height 34 inch (20 mm) Drain gravel Overflow r �•a , .\% _t � Curb inlet ���``' /. Wire screen or filter fabric 2x4 Wood stud (100x50 Timber stud) Catch basin \j' Concrete block Section A-A Notes: 1. Use block and gravel type sediment barrier when curb inlet is located in gently sloping street segment, where water can pond and allow sediment to separate from runoff. 2. Barrier shall allow for overflow from severe storm event. 3. Inspect barriers and remove sediment after each storm event. Sediment and gravel must be removed from the traveled way immediately. NOT TO SCALE . 1111 Figure 11-4.2. 9 111111 Block and gravel Curb hinlet Protection DEPARTMENT OF Revised August 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for V/estem Washington Volume II e Chapter 4 o Page 363 r rig pirra U_L,41o20 L (C) ©uiEcft 1GNtit�'1 NC9E1` L) I[t'U'NOT Back of sidewalk Burlap sacks to overlap onto curb Bacic of curb Runoff Curb inlet Runoff Spillway i) Catch basin Plan View Gravel filled sandbags stacked tightly Notes: 1. Place curb type sediment barriers on gently sloping street segments, where water can pond and allow sediment to separate from runoff. 2. Sandbags of either burlap or woven 'geotextile' fabric, are filled with gravel, layered and packed tightly. 3. Leave a one sandbag gap in the top row to provide a spillway for overflow. 4. Inspect barriers and remove sediment after each storm event. Sediment and gravel must be removed from the traveled way immediately. NOT TO SCALE IMAM! FigureV =42. ` 0 Curb and Gutter Barrier DEPARTMENT OF Revised September 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume ll m Chapter 4 - Page 364 BMP C232: Gravel Filter Berm Purpose A gravel filter berm is constructed on rights-of-way or traffic areas within a construction site to retain sediment by using a filter berm of gravel or crushed rock. Conditions of Use Where a temporary measure is needed to retain sediment from rights-of-way or in traffic areas on construction sites. Design and Installation Specifications . Berm material shall be 3/to 3 inches in size, washed well-grade gravel or crushed rock with less than 5 percent fines. . Spacing of berms: o Every 300 feet on slopes less than 5 percent o Every 200 feet on slopes between 5 percent and 10 percent O Every 100 feet on slopes greater than 10 percent . Berm dimensions: • 1 foot high with 3H:1 V side slopes O 8 linear feet per 1 cfs runoff based on the 10-year, 24-hour design storm Maintenance Standards . Regular inspection is required. Sediment shall be removed and filter material replaced as needed. P C233: Silt Fence Purpose Use of a silt fence reduces the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. See Figure II-4.2.12 Silt Fence (p.369) for details on silt fence con- struction. Conditions of Use Silt fence may be used downslope of all disturbed areas. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4-Page 367 P C232: Gravel Filter germ Purpose A gravel filter berm is constructed on rights-of-way or traffic areas within a construction site to retain sediment by using a filter berm of gravel or crushed rock. Conditions of Use Where a temporary measure is needed to retain sediment from rights-of-way or in traffic areas on construction sites. Design and Installation Specifications • Berm material shall be 3/to 3 inches in size, washed well-grade gravel or crushed rock with less than 5 percent fines. • Spacing of berms: • Every 300 feet on slopes less than 5 percent • Every 200 feet on slopes between 5 percent and 10 percent • Every 100 feet on slopes greater than 10 percent • Berm dimensions: • 1 foot high with 3H:1V side slopes • 8 linear feet per 1 cfs runoff based on the 10-year, 24-hour design storm Maintenance Standards • Regular inspection is required. Sediment shall be removed and filter material replaced as needed. BMP C233: Silt Fence Purpose Use of a silt fence reduces the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. See Figure 11-4.2.12 Silt Fence (p.369)for details on silt fence con- struction. Conditions of Use Silt fence may be used downslope of all disturbed areas. 2014 Stormwater Management Manual for Western Washington Volume 11- Chapter 4 -Page 367 . Silt fence shall prevent soil carried by runoff water from going beneath, through, or over the top of the silt fence, but shall allow the water to pass through the fence. . Silt fence is not intended to treat concentrated flows, nor is it intended to treat sub- stantial amounts of overland flow. Convey any concentrated flows through the drainage system to a sediment pond. . Do not construct silt fences in streams or use in V-shaped ditches. Silt fences do not provide an adequate method of silt control for anything deeper than sheet or overland flow. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4-Page 368 Joints in filter fabric shall be spliced at posts. Use staples, wire rings or equivalent to attach fabric to posts 2"x2" by 14 Ga. wire or equivalent, if standard strength fabric used ■■■■■■__■■. ■ II.t • •�■■■■■ ■■■i■ ■ •�\■•■__■■■•• ■■ 4 •''''''O'O'O''••'''•'''•�i''O'•'�A MUM ■■■ ••'•'• ••'•'•'O•••'O•'••O.O'•'•'•'•'•'••ii•'•'•'•'•'•'•'•'•'•'•'iA► 4!1■■■_ ■1 i'i' 'i'i'i''i'ii'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'!Oi�'!�i!■■•• .\.. . . ♦••••••••••••••••••'i•••••••••♦► ♦► !! � 1� •'•'•'•'•'•'•'•'•••'•'•'•'•'•!'•'•'•'•'•'•'•'•'•'•'•'••'•• •" 40 .yam ,„....../.. uI VXJH.. .... :... \ .-`/ 1\\\.\\\�\\rr rF Ir 6' max i I Minimum I I 4"x4" trench ! I L Post spacing may be increased —77 to 8' if wire backing is used 2"x2" wood posts, steel —/ fence posts, or equivalent 2"x2" by 14 Ga. wire or equivalent, if standard strength fabric used A 0 j / / MI MI / Filter fabric �; �j\ UI \,\\\ MI MI 2 min \ \\ \ in / mi \\ \ •I Backfill trench with \��%///\ , ��,�; \•Mil native soil or a - , !!t■1 1.5" washed gravel J=�o'''" \�/\ X\/\ \\ \ \ /\/`\/m\// /\/. Minimum \//\/�\ 4"x4" trench 2"x2" wood posts, steel fence posts, or equivalent NOT TO SCALE ltill ' 11 FigureH=4.2. E2 I:WM Silt Fence DEPARTMENT OF Revised October 2014 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume 110 Chapter 4 0 Page 369 Design and installation Specifications . Use in combination with sediment basins or other BMPs. . Maximum slope steepness (normal (perpendicular) to fence line) 1 H:1 V. . Maximum sheet or overland flow path length to the fence of 100 feet. . Do not allow flows greater than 0.5 cfs. . The geotextile used shall meet the following standards. All geotextile properties lis- ted below are minimum average roll values (i.e., the test result for any sampled roll in a lot shall meet or exceed the values shown in Table II-4.2.3 Geotextile Stand- ards (p.370)): Table 11-4.2.3 Geotextile Standards 0.60 mm maximum for slit film woven (#30 sieve). Polymeric Mesh AOS 0.30 mm maximum for all other geotextile types (#50 sieve). (ASTM D4751) 0.15 mm minimum for all fabric types (#100 sieve). Water Permittivity 0.02 sec-1 minimum (ASTM D4491) Grab Tensile Strength 180 lbs. Minimum for extra strength fabric. (ASTM D4632) 100 lbs minimum for standard strength fabric. Grab Tensile Strength 30% maximum (ASTM D4632) Ultraviolet Resistance 70% minimum (ASTM D4355) . Support standard strength fabrics with wire mesh, chicken wire, 2-inch x 2-inch wire, safety fence, or jute mesh to increase the strength of the fabric. Silt fence materials are available that have synthetic mesh backing attached. . Filter fabric material shall contain ultraviolet ray inhibitors and stabilizers to provide a minimum of six months of expected usable construction life at a temperature range of 0°F. to 120°F. . One-hundred percent biodegradable silt fence is available that is strong, long last- ing, and can be left in place after the project is completed, if permitted by local reg- ulations. . Refer to Figure II-4.2.12 Silt Fence (p.369) for standard silt fence details. Include the following standard Notes for silt fence on construction plans and specifications: 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 370 1. The contractor shall install and maintain temporary silt fences at the locations shown in the Plans. 2. Construct silt fences in areas of clearing, grading, or drainage prior to starting those activities. 3. The silt fence shall have a 2-feet min. and a 2'/-feet max. height above the original ground surface. 4. The filter fabric shall be sewn together at the point of manufacture to form fil- ter fabric lengths as required. Locate all sewn seams at support posts. Altern- atively, two sections of silt fence can be overlapped, provided the Contractor can demonstrate, to the satisfaction of the Engineer, that the overlap is long enough and that the adjacent fence sections are close enough together to prevent silt laden water from escaping through the fence at the overlap. 5. Attach the filter fabric on the up-slope side of the posts and secure with staples,wire, or in accordance with the manufacturer's recommendations. Attach the filter fabric to the posts in a manner that reduces the potential for tearing. 6. Support the filter fabric with wire or plastic mesh, dependent on the properties of the geotextile selected for use. If wire or plastic mesh is used, fasten the mesh securely to the up-slope side of the posts with the filter fabric up-slope of the mesh. 7. Mesh support, if used, shall consist of steel wire with a maximum mesh spa- cing of 2-inches, or a prefabricated polymeric mesh. The strength of the wire or polymeric mesh shall be equivalent to or greater than 180 lbs. grab tensile strength. The polymeric mesh must be as resistant to the same level of ultra- violet radiation as the filter fabric it supports. 8. Bury the bottom of the filter fabric 4-inches min. below the ground surface. Backfill and tamp soil in place over the buried portion of the filter fabric, so that no flow can pass beneath the fence and scouring cannot occur. When wire or polymeric back-up support mesh is used, the wire or polymeric mesh shall extend into the ground 3-inches min. 9. Drive or place the fence posts into the ground 18-inches min.A 12—inch min. depth is allowed if topsoil or other soft subgrade soil is not present and 18- inches cannot be reached. Increase fence post min. depths by 6 inches if the fence is located on slopes of 3H:1 V or steeper and the slope is perpendicular to the fence. If required post depths cannot be obtained, the posts shall be adequately secured by bracing or guying to prevent overturning of the fence due to sediment loading. 10. Use wood, steel or equivalent posts. The spacing of the support posts shall 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 - Page 371 be a maximum of 6-feet. Posts shall consist of either: . Wood with dimensions of 2-inches by 2-inches wide min. and a 3-feet min. length. Wood posts shall be free of defects such as knots, splits, or gouges. . No. 6 steel rebar or larger. . ASTM A 120 steel pipe with a minimum diameter of 1-inch. . U, T, L, or C shape steel posts with a minimum weight of 1.35 lbs./ft. . Other steel posts having equivalent strength and bending resistance to the post sizes listed above. 11. Locate silt fences on contour as much as possible, except at the ends of the fence, where the fence shall be turned uphill such that the silt fence captures the runoff water and prevents water from flowing around the end of the fence. 12. If the fence must cross contours, with the exception of the ends of the fence, place gravel check dams perpendicular to the back of the fence to minimize concentrated flow and erosion. The slope of the fence line where contours must be crossed shall not be steeper than 3H:1 V. . Gravel check dams shall be approximately 1-foot deep at the back of the fence. Gravel check dams shall be continued perpendicular to the fence at the same elevation until the top of the check dam intercepts the ground surface behind the fence. . Gravel check dams shall consist of crushed surfacing base course, gravel backfill for walls, or shoulder ballast. Gravel check dams shall be located every 10 feet along the fence where the fence must cross con- tours. . Refer to Figure 11-4.2.13 Silt Fence Installation by Slicing Method (p.374)for slicing method details. Silt fence installation using the slicing method specifications: 1. The base of both end posts must be at least 2-to 4-inches above the top of the filter fabric on the middle posts for ditch checks to drain properly. Use a hand level or string level, if necessary, to mark base points before install- ation. 2. Install posts 3-to 4-feet apart in critical retention areas and 6-to 7-feet apart in standard applications. 3. Install posts 24-inches deep on the downstream side of the silt fence, and as close as possible to the filter fabric, enabling posts to support the filter fabric from upstream water pressure. 4. Install posts with the nipples facing away from the filter fabric. 2014 Stormwater Management Manual for Western Washington Volume II- Chapter 4 -Page 372 5. Attach the filter fabric to each post with three ties, all spaced within the top 8- inches of the filter fabric. Attach each tie diagonally 45 degrees through the fil- ter fabric, with each puncture at least 1-inch vertically apart. Each tie should be positioned to hang on a post nipple when tightening to prevent sagging. 6. Wrap approximately 6-inches of fabric around the end posts and secure with 3 ties. 7. No more than 24-inches of a 36-inch filter fabric is allowed above ground level. Compact the soil immediately next to the filter fabric with the front wheel of the tractor, skid steer, or roller exerting at least 60 pounds per square inch. Compact the upstream side first and then each side twice for a total of four trips. Check and correct the silt fence installation for any deviation before compaction. Use a flat-bladed shovel to tuck fabric deeper into the ground if necessary. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 373 q�iffrr Q]-4.22o1i 3 Ont Fence H is minaalo by sHrickv Kure®°©d Ponding height max. 24" POST SPACING: 7' max. on open runs Attach fabric to. 4' max. on pooling areas Top of Fabric upstream side of post I A�������IV�IFI Belt FLOW — - Ill POST DEPTH: LS top 8" t i As much below ground Drive over each side of I1 silt fence 2 to 4 times as fabric above ground with device exerting 60 p.s.i. or greater Diagonal attachment 100% compaction 100% compaction doubles strength =1 i II-1 11=1 I I=1 I I III=11►=1I 1=1 I I=1 11=i ;, IIIIIIIIIIII ITIIII III 1111lIIIIIIIIIIIIIIIIIIIII EI I II I W I-1111 I II 11II 1UMCW I II 1 I I I II=1I I-I 11= MEIIIEllEli t 111EI I I—III—III—III_ Attachment Details: —III—1 l E111 R 1=111=III=I 11E111—I I I III-111=I11-—4 a 111=1I1-111E11I-Ill— • Gather fabric at posts, if needed. —1I1=III-11AP, y 1-111E11lallE111-11' • Utilize three ties per post, all within top 8" I_I=11=111— _ Ila 11-111E111-111= —I11=1►1—I l lE ►1 a�i 1=1► EI 11-I- 11=1 I of fabric. II-111—Ili=III— III=111=111-111-111 • Position each tie diagonally, puncturing =11 E111=I 11-11 I I-111E111E111-11 I-1 '1=111= I1=1I IE 111=I I1-1-111-1' holes vertically a minimum of 1" apart. ;111111,;,111-III 1=11I-111111-1' • Hang each tie on a post nipple and tighten No more than 24" of a 36" securely. Use cable ties (50 Ibs) or soft fabric is allowed above ground wire. � Roll of silt fence —.1-- Operation !"::tion Fabric above %,/i)1 groundSilt Fence • f_i1T�m—f1T—fTT TI1`T1T�11I_ Ft ml I I-1 200- I� -I I111 ' 111 I�)-111-1111 I I-111=11►-111=1 ' 1►I- I�=111-1 1-Ri►i1►1—I I II I)-1►iI I I_I I I-I I l l `Illih�ulll` ` ,300mm i !Hi El 1 1 n-Et i 111=1►1-11 �,,1111111111��1�11�1111�11w I�;' E I► i�di) lI 1I r :,;111111,;,Ifl,;,lll,;,lll I,;,I►1,;,III,,, 11,;,111,;,1►1 —,,,—,,,_ Ili ';f11 Li v Horizontal chisel point Slicing blade (76 mm width) (18 mm width) Completed Installation Vibratory plow is not acceptable because of horizontal compaction NOT TO SCALE 1113111 r` Figure I l=4.2. 13 "Will Silt Fence Installation by Slicing Method DEPARTMENT OF Revised November 2015 E C 0 1O G Y Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume II o Chapter 4 m Page 374 Maintenance Standards . Repair any damage immediately. . Intercept and convey all evident concentrated flows uphill of the silt fence to a sed- iment pond. . Check the uphill side of the fence for signs of the fence clogging and acting as a barrier to flow and then causing channelization of flows parallel to the fence. If this occurs, replace the fence or remove the trapped sediment. . Remove sediment deposits when the deposit reaches approximately one-third the height of the silt fence, or install a second silt fence. . Replace filter fabric that has deteriorated due to ultraviolet breakdown. BMP C234: Vegetated Strip Purpose Vegetated strips reduce the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. Conditions of Use . Vegetated strips may be used downslope of all disturbed areas. . Vegetated strips are not intended to treat concentrated flows, nor are they intended to treat substantial amounts of overland flow. Any concentrated flows must be con- veyed through the drainage system to a sediment pond. The only circumstance in which overland flow can be treated solely by a strip, rather than by a sediment pond, is when the following criteria are met(see Table 11-4.2.4 Contributing Drain- age Area for Vegetated Strips (p.375)): Table 11-4.2.4 Contributing Drainage Area for Vegetated Strips Average Contributing Average Contributing Area Max Contributing area Area Slope Percent Slope Flowpath Length 1.5H : 1 V or flatter 67% or flatter 100 feet 2H : 1 V or flatter 50% or flatter 115 feet 4H : 1 V or flatter 25% or flatter 150 feet 6H : 1 V or flatter 16.7% or flatter 200 feet 10H : 1 V or flatter 10% or flatter 250 feet 2014 Stormwater Management Manual for Western Washington Volume 11- Chapter 4-Page 375 Design and Installation Specifications . The vegetated strip shall consist of a minimum of a 25-foot flowpath length con- tinuous strip of dense vegetation with topsoil. Grass-covered, landscaped areas are generally not adequate because the volume of sediment overwhelms the grass. Ideally, vegetated strips shall consist of undisturbed native growth with a well-developed soil that allows for infiltration of runoff. . The slope within the strip shall not exceed 4H:1V. . The uphill boundary of the vegetated strip shall be delineated with clearing limits. Mai'}tenance Standards . Any areas damaged by erosion or construction activity shall be seeded imme- diately and protected by mulch. . If more than 5 feet of the original vegetated strip width has had vegetation removed or is being eroded, sod must be installed. . If there are indications that concentrated flows are traveling across the buffer, sur- face water controls must be installed to reduce the flows entering the buffer, or addi- tional perimeter protection must be installed. BMP C235: Wattles Purpose Wattles are temporary erosion and sediment control barriers consisting of straw, com- post, or other material that is wrapped in biodegradable tubular plastic or similar encas- ing material. They reduce the velocity and can spread the flow of rill and sheet runoff, and can capture and retain sediment. Wattles are typically 8 to 10 inches in diameter and 25 to 30 feet in length. Wattles are placed in shallow trenches and staked along the contour of disturbed or newly constructed slopes. See Figure 11-4.2.14 Wattles (p.378)for typical construction details. WSDOT Standard Plan 1-30.30-00 also provides information on Wattles (http://www.wsdot.wa.gov/Design/Standards/Plans.htm#Sectionl) Conditions of Use . Use wattles: . In disturbed areas that require immediate erosion protection. . On exposed soils during the period of short construction delays, or over winter months. . On slopes requiring stabilization until permanent vegetation can be estab- lished. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 -Page 376 . The material used dictates the effectiveness period of the wattle. Generally, Wattles are typically effective for one to two seasons. . Prevent rilling beneath wattles by properly entrenching and abutting wattles together to prevent water from passing between them. Design Criteria . Install wattles perpendicular to the flow direction and parallel to the slope contour. . Narrow trenches should be dug across the slope on contour to a depth of 3-to 5- inches on clay soils and soils with gradual slopes. On loose soils, steep slopes, and areas with high rainfall, the trenches should be dug to a depth of 5-to 7- inches, or 1/2 to 2/3 of the thickness of the wattle. . Start building trenches and installing wattles from the base of the slope and work up. Spread excavated material evenly along the uphill slope and compacted using hand tamping or other methods. . Construct trenches at intervals of 10-to 25-feet depending on the steepness of the slope, soil type, and rainfall. The steeper the slope the closer together the trenches. . Install the wattles snugly into the trenches and abut tightly end to end. Do not over- lap the ends. . Install stakes at each end of the wattle, and at 4-foot centers along entire length of wattle. . If required, install pilot holes for the stakes using a straight bar to drive holes through the wattle and into the soil. . Wooden stakes should be approximately 3/4 x 3/4 x 24 inches min. Willow cuttings or 3/8-inch rebar can also be used for stakes. . Stakes should be driven through the middle of the wattle, leaving 2 to 3 inches of the stake protruding above the wattle. Maintenance Standards . Waffles may require maintenance to ensure they are in contact with soil and thor- oughly entrenched, especially after significant rainfall on steep sandy soils. 2014 Stormwater Management Manual for Western Washington Volume ll- Chapter 4 - Page 377 , c'i)) 3' - 4' \. (1.2m) -, $\\p-# ',N,' \\,)k \\1/ ifs'- /// — 1 Straw rolls must be ,,OP�,''`;/ //// ' �� placed along slope ��� 1`` ? f Adjacent rolls contours ,/\ \ , shall tightly abut ,/ `,J /\''' \'` ,. . 4 j t. t** 10' - 25' (3-8m) / \k/ \\I ```��� , >7/, \, , . ,./. ...., ;,, Spacing depends ,, �'' on soil type and slope steepness Sediment, organic matter, \ and native seeds are ://> ' ' / ? *441irt captured behind the rolls. _C- Th 3" - 5" (75-125mm) / // 8/,,,a .G (200-250mm) . \/ \Y,.41 \\,-,>,\ at ,..-- k Live Stake //•��' \��` / -.s r•, ,, // • //. \- / •�.� // 1" x l" Stake �%� r ,„, \� (25 x 25mm) 4 t t\._ NOTE: i 1. Straw roll installation requires the placement and secure staking I ' of the roll in a trench, 3" -5" (75-125mm) deep, dug on contour. Runoff must not be allowed to run under or around roll. NOT TO SCALE Figure II-4.2 . 1[ 4 °Willi Wattles Revised November 2015 DEPARTMENT OF ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Storrnwater Management Manual for Western Washington Volume 11 - Chapter 4 a Page 378 . Inspect the slope after significant storms and repair any areas where wattles are not tightly abutted or water has scoured beneath the wattles. Approved as Equivalent Ecology has approved products as able to meet the requirements of BMP C235: Wattles. The products did not pass through the Technology Assessment Protocol — Ecology (TAPE) process. Local jurisdictions may choose not to accept this product approved as equivalent, or may require additional testing prior to consideration for local use. The products are available for review on Ecology's website at http://www.ecy.wa.gov- /programs/wq/stormwater/newtech/equivalent.html 13MP C236: Vegetative Filtration Purpose Vegetative Filtration may be used in conjunction with BMP C241: Temporary Sediment Pond (p.388), BMP C206: Level Spreader (p.348) and a pumping system with surface intake to improve turbidity levels of stormwater discharges by filtering through existing vegetation where undisturbed forest floor duff layer or established lawn with thatch layer are present. Vegetative Filtration can also be used to infiltrate dewatering waste from foundations, vaults, and trenches as long as runoff does not occur. Conditions of Use . For every five acre of disturbed soil use one acre of grass field, farm pasture, or wooded area. Reduce or increase this area depending on project size, ground water table height, and other site conditions. . Wetlands shall not be used for filtration. . Do not use this BMP in areas with a high ground water table, or in areas that will have a high seasonal ground water table during the use of this BMP. . This BMP may be less effective on soils that prevent the infiltration of the water, such as hard till. . Using other effective source control measures throughout a construction site will prevent the generation of additional highly turbid water and may reduce the time period or area need for this BMP. . Stop distributing water into the vegetated area if standing water or erosion results. Design Criteria . Find land adjacent to the project that has a vegetated field, preferably a farm field, or wooded area. . If the project site does not contain enough vegetated field area consider obtaining 2014 Stormwater Management Manual for Western Washington Volume Il- Chapter 4 -Page 379 Downspout Full Infiltration Systems (UMVMP T5.IOA) Downspout full infiltration systems are trench or drywell designs intended only for use in infiltrating runoff from roof downspout drains. They are not designed to directly infiltrate runoff from pollutant-generating impervious surfaces. Application Projects subject to 1-2.5.5 Minimum Requirement#5: On-site Stormwater Management (p.55) must provide for individual downspout full infiltration systems or full dispersion if feasible. Evaluate the feasibility, or applicability, of downspout full infiltration unless full dispersion is proposed. Use the evaluation procedure below to determine the feasibility of downspout full infiltration. Runoff Modeling for Roof Downspout Full Infiltration If roof runoff is infiltrated according to the requirements of this section, the roof area may be discounted from the project area used for sizing stormwater facilities. Procedure for Evaluating Feasibility 1. Have one of the following prepare a soils report to determine if soils suitable for infiltration are present on the site: . A professional soil scientist certified by the Soil Science Society of America (or an equivalent national program) . A locally licensed on-site sewage designer . A suitably trained person working under the supervision of a professional engineer, geologist, hydrogeologist, or engineering geologist registered in the State of Washington. The report shall reference a sufficient number of soils logs to establish the type and limits of soils on the project site. The report should at a minimum identify the limits of any outwash type soils (i.e., those meeting USDA soil texture classes ranging from coarse sand and cobbles to medium sand) versus other soil types and include an inventory of topsoil depth. 2. If the lots or site does not have outwash or loam soils, and full dispersion is not feasible, then consider a rain garden or bioretention BMPs (the next lower priority on-site stormwater management system). 3. Complete additional site-specific testing on lots or sites containing outwash (coarse sand and cobbles to medium sand) and loam type soils. Individual lot or site tests must consist of at least one soils log at the location of the infiltration system, a minimum of 4 feet in depth from the proposed grade and at 2014 Stormwater Management Manual for Western Washington Volume Ill- Chapter 3 -Page 452 least 1 foot below the expected bottom elevation of the infiltration trench or dry well. Identify the NRCS series of the soil and the USDA textural class of the soil horizon through the depth of the log, and note any evidence of high ground water level, such as mottling. 4. Downspout infiltration is considered feasible on lots or sites that meet all of the fol- lowing: • 3 feet or more of permeable soil from the proposed final grade to the sea- sonal high ground water table. • At least 1-foot of clearance from the expected bottom elevation of the infilt- ration trench or dry well to the seasonal high ground water table. • The downspout full infiltration system can be designed to meet the minimum design criteria specified below. Design Criteria for Infiltration Trenches Figure III-3.1.2 Typical Downspout Infiltration Trench (p.455) shows a typical downspout infiltration trench system, and Figure III-3.1.3 Alternative Downspout Infiltration Trench System for Coarse Sand and Gravel (p.456) presents an alternative infiltration trench sys- tem for sites with coarse sand and cobble soils. These systems are designed as spe- cified below. General 1. The following minimum lengths (linear feet) per 1,000 square feet of roof area based on soil type may be used for sizing downspout infiltration trenches. Coarse sands and cobbles: 20 LF Medium sand: 30 LF Fine sand, loamy sand: 75 LF Sandy loam: 125 LF Loam: 190 LF 2. Maximum length of trench shall not exceed 100 feet from the inlet sump. 3. Minimum spacing between trench centerlines shall be 6 feet. 4. Filter fabric shall be placed over the drain rock as shown on Figure 111-3.1.2 Typical Downspout Infiltration Trench (p.455) prior to backfilling. 5. Infiltration trenches may be placed in fill material if the fill is placed and compacted under the direct supervision of a geotechnical engineer or professional civil 2014 Stormwater Management Manual for Western Washington Volume Ill- Chapter 3 -Page 453 engineer with geotechnical expertise, and if the measured infiltration rate is at least 8 inches per hour. Trench length in fill must be 60 linear feet per 1,000 square feet of roof area. Infiltration rates can be tested using the methods described in Section 3.3. 6. Infiltration trenches should not be built on slopes steeper than 25% (4:1).A geo- technical analysis and report may be required on slopes over 15 percent or if loc- ated within 200 feet of the top of slope steeper than 40%, or in a landslide hazard area. 7. Trenches may be located under pavement if a small yard drain or catch basin with grate cover is placed at the end of the trench pipe such that overflow would occur out of the catch basin at an elevation at least one foot below that of the pavement, and in a location which can accommodate the overflow without creating a sig- nificant adverse impact to downhill properties or drainage systems. This is inten- ded to prevent saturation of the pavement in the event of system failure. Design Criteria for Infiltration Drywells Figure III-3.1.4 Typical Downspout Infiltration Drywell (p.457) shows a typical downspout infiltration drywell system. These systems are designed as specified below. General 1. Drywell bottoms must be a minimum of 1 foot above seasonal high ground water level or impermeable soil layers. 2. When located in course sands and cobbles, drywells must contain a volume of gravel equal to or greater than 60 cubic feet per 1000 square feet of impervious sur- face served. When located in medium sands, drywells must contain at least 90 cubic feet of gravel per 1,000 square feet of impervious surface served. 3. Drywells must be at least 48 inches in diameter(minimum) and deep enough to contain the gravel amounts specified above for the soil type and impervious sur- face served. 4. Filter fabric (geotextile) must be placed on top of the drain rock and on trench or dry- well sides prior to backfilling. 5. Spacing between drywells must be a minimum of 10 feet. 6. Downspout infiltration drywells must not be built on slopes greater than 25% (4:1). Drywells may not be placed on or above a landslide hazard area or on slopes greater than 15% without evaluation by a professional engineer with geotechnical expertise or a licensed geologist, hydrogeologist, or engineering geologist, and with jurisdiction approval. 2014 Stormwater Management Manual for Western Washington Volume Ill- Chapter 3-Page 454 Figure 111-3.1.2 Typical Downspout Infiltration Trench Plan View 4"rigid or 6"flexible roof perforated pipe drain sump w/solid lid infiltration trench roof drain —N overflow Profile View 4"rigid or 6"flexible splash block perforated pipe CB sump - -- A w/solid lid 6" 6" 12" washed rock 1 Y2"-%" 1'min 1'min _` A fine mesh screen T varies 10'min. 5'min. --- Section A-A filter fabric compacted backfill 6" �II3v > zII� != � 24" �..�� '+" 4"rigid or 6"flexible perforated pipe 12" t_ a �. II I:i �; �= � i= :_i�y;_•I" washed rock 1 Y2"-3/4" 11.=1�=IL=11.=IL=11.- _ 24" �1 NOT TO SCALE 111■MIM Figure III-3.1 .2 11111 Typical Downspout Infiltration Trench Revised November 2015 DEPARTMENT OF ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability,and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume III- Chapter 3-Page 455 111-3.1.3 Perforated Stub Out Connections (BMP T5.IOC) A perforated stub out connection is a length of perforated pipe within a gravel filled trench that is placed between roof downspouts and a stub out to the local drainage sys- tem. Figure III-3.1.8 Perforated Stub-Out Connection (p.466) illustrates a perforated stub out connection. These systems are intended to provide some infiltration during drier months. During the wet winter months, they may provide little or no flow control. Applications & Limitations Perforated stub-outs are not appropriate when seasonal water table is less than one foot below trench bottom. In projects subject to 1-2.5.5 Minimum Requirement#5: On-site Stormwater Management (p.55), perforated stub-out connections may be used only when all other higher priority on-site stormwater management BMPs are not feasible, per the criteria for each of those BMPs. Select the location of the connection to allow a maximum amount of runoff to infiltrate into the ground (ideally a dry, relatively well drained, location). To facilitate maintenance, do not locate the perforated pipe portion of the system under impervious or heavily com- pacted (e.g., driveways and parking areas) surfaces. Use the same setbacks as for infilt- ration trenches in III-3.1.1 Downspout Full Infiltration Systems (BMP T5.10A) (p.452). Have a licensed geologist, hydrogeologist, or engineering geologist evaluate potential runoff discharges towards landslide hazard areas. Do not place the perforated portion of the pipe on or above slopes greater than 20% or above erosion hazard areas without evaluation by a professional engineer with geotechnical expertise or qualified geologist and jurisdiction approval. For sites with septic systems, the perforated portion of the pipe must be downgradient of the drainfield primary and reserve areas. This requirement can be waived if site topo- graphy will clearly prohibit flows from intersecting the drainfield or where site conditions (soil permeability, distance between systems, etc.) indicate that this is unnecessary. Design Criteria Perforated stub out connections consist of at least 10 feet of perforated pipe per 5,000 square feet of roof area laid in a level, 2 foot wide trench backfilled with washed drain rock. Extend the drain rock to a depth of at least 8 inches below the bottom of the pipe and cover the pipe. Lay the pipe level and cover the rock trench with filter fabric and 6 inches of fill (see Figure III-3.1.8 Perforated Stub-Out Connection (p.466)). Runoff Model Representation Any flow reduction is variable and unpredictable. No computer modeling techniques are allowed that would predict any reduction in flow rates and volumes from the connected 2014 Stormwater Management Manual for Western Washington Volume 111- Chapter 3-Page 465 area. r,s v_z FpB 3 1 n Perforated Stub-Out Connectio random fill V .i4.,. .;`. li�.:.>.1ri..-' try k, <l',;•:::: rat./: :. 11h"4-.1^. r. ','..-•.5��1 a�� ..: ; v:d-, ,=><:'-r ,:�:-?, ; filter fabric :_ , `. . i,,y •...1: •z; tiw ire•, �►�: � 4�� perf pipe 18 min. •r� �feics,+ri— ra `��' •,—` ll 1 2" - 3/4" washed rock 4, 011-04,Froarovwd..,,,r,„, 0. ,iigurste ....oroo _Li _ _ 1,,,o..... ......,.....z..... ._ 24" min. Trench X-Section slope w,— f to road drainage system 2' x 10' level trench w/perf pipe Plan View of Roof NOT TO SCALE Mil libis Figure lllo3e1 . 8 "lebill Perforated Stub-out Connection DEPARTMENT OF Revised December 2015 ECOLOGY Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume Ill e Chapter 3 - Page 466 BMP T5.12: Sheet Flow Dispersion Purpose and Definition Sheet flow dispersion is the simplest method of runoff control. This BMP can be used for any impervious or pervious surface that is graded to avoid concentrating flows ). Because flows are already dispersed as they leave the surface, they need only traverse a narrow band of adjacent vegetation for effective attenuation and treatment. Applications and Limitations Use this BMP for flat or moderately sloping (< 15% slope) surfaces such as driveways, sports courts, patios, roofs without gutters, lawns, pastures; or any situation where con- centration of flows can be avoided. Design Guidelines . See Figure V-5.3.2 Sheet Flow Dispersion for Driveways (p.910) for details for driveways. ▪ Provide a 2-foot-wide transition zone to discourage channeling between the edge of the impervious surface (or building eaves) and the downslope vegetation. This transition zone may consist of an extension of subgrade material (crushed rock), modular pavement, drain rock, or other material acceptable to the Local Plan Approval Authority. • Provide a 10-foot-wide vegetated buffer for up to 20 feet of width of paved or imper- vious surface. Provide an additional 10 feet of vegetated buffer width for each addi- tional 20 feet of impervious surface width or fraction thereof. (For example, if a driveway is 30 feet wide and 60 feet long provide a 20-foot wide by 60-foot long vegetated buffer, with a 2-foot by 60-foot transition zone.) • No erosion or flooding of downstream properties may result. ® Runoff discharge toward landslide hazard areas must be evaluated by a geo- technical engineer or a qualified geologist. Do not allow sheet flow on or above slopes greater than 20%, or above erosion hazard areas, without evaluation by a geotechnical engineer or qualified geologist and approval by the Local Plan Approval Authority. . For sites with septic systems, the discharge area must be ten feet downgradient of the drainfield primary and reserve areas (WAC 246-272A-0210). A Local Plan Approval Authority may waive this requirement if site topography clearly prohibits flows from intersecting the drainfield. 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 908 Runoff Modeling Where BMP T5.12: Sheet Flow Dispersion is used to disperse runoff into an undisturbed native landscape area or an area that meets BMPT5.131 Post-Construction Soil Quality and Depth (p.911), and the vegetated flow path is 50 feet or more, the impervious area may be modeled as landscaped area. Where the vegetated flowpath is 25 to 50 feet, use of a dispersion trench (see BMP T5.10B: Downspout Dispersion Systems (p.905)) allows modeling the impervious area as 50% impervious/50% landscape. This is done in the WWHM3 on the Mitigation Scenario screen by entering the dispersed impervious area into one of the entry options for dispersal of impervious area runoff. For procedures in WWHM 2012, see Appendix Ill-C: Washington State Department of Ecology Low Impact Development Flow Modeling Guidance (p.587). 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 909 Figure V-5 3 Sheet Flow Dispersion for Driveways to M raj 0) m 1 Locate drain 25' from = 9 1 1 ROW if driveway 0, v slopes toward street. I i tri 700 sq. ft. max. between berms 'i I -4 I I 1. 1 I j Driveway 2-4" Slope t I-a— 6' min -r.-1 0 -' µ,.:7: c M � M 1 Berm Detail •7.3.' f r: --- T�� Diagonal `' - TA 25'vegetated berm with -.6 >25, flowpath dispersion / I / trench / I Plan Driveway Dispersion Trench Driveway Slope Varies and Slopes Toward Street /� Is .` / I0 / /�i �� 0 i./' /' t ' / i Max: 2% I Driveway w: _ I cross slope Slope Plan �v6 a6 Sheet Flow Dispersion from a Driveway G���r ` 6, Flat to Moderately Sloping Driveways I NOT TO SCALE .11131011111 . 11 Figure V-5. 3.2 lialli Sheet Flow Dispersion for Driveways DEPARTMENT OF Revised January 2016 ECOLOGY Please see http.//www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume V - Chapter 5 - Page 910 BMP T5 13: Post-Construction Soil Quality and Depth Purpose and Definition Naturally occurring (undisturbed) soil and vegetation provide important stormwater func- tions including: water infiltration; nutrient, sediment, and pollutant adsorption; sediment and pollutant biofiltration; water interflow storage and transmission; and pollutant decom- position. These functions are largely lost when development strips away native soil and vegetation and replaces it with minimal topsoil and sod. Not only are these important stormwater functions lost, but such landscapes themselves become pollution generating pervious surfaces due to increased use of pesticides, fertilizers and other landscaping and household/industrial chemicals, the concentration of pet wastes, and pollutants that accompany roadside litter. Establishing soil quality and depth regains greater stormwater functions in the post devel- opment landscape, provides increased treatment of pollutants and sediments that result from development and habitation, and minimizes the need for some landscaping chem- icals, thus reducing pollution through prevention. Applications and Limitations Establishing a minimum soil quality and depth is not the same as preservation of nat- urally occurring soil and vegetation. However, establishing a minimum soil quality and depth will provide improved on-site management of stormwater flow and water quality. Soil organic matter can be attained through numerous materials such as compost, com- posted woody material, biosolids, and forest product residuals. It is important that the materials used to meet the soil quality and depth BMP be appropriate and beneficial to the plant cover to be established. Likewise, it is important that imported topsoils improve soil conditions and do not have an excessive percent of clay fines. This BMP can be considered infeasible on till soil slopes greater than 33 percent. Design Guidelines Soil retention. Retain, in an undisturbed state, the duff layer and native topsoil to the maximum extent practicable. In any areas requiring grading remove and stock- pile the duff layer and topsoil on site in a designated, controlled area, not adjacent to public resources and critical areas, to be reapplied to other portions of the site where feasible. . Soil quality. All areas subject to clearing and grading that have not been covered by impervious surface, incorporated into a drainage facility or engineered as struc- tural fill or slope shall, at project completion, demonstrate the following: 1. A topsoil layer with a minimum organic matter content of 10% dry weight in planting beds, and 5% organic matter content in turf areas, and a pH from 6.0 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 911 to 8.0 or matching the pH of the undisturbed soil. The topsoil layer shall have a minimum depth of eight inches except where tree roots limit the depth of incorporation of amendments needed to meet the criteria. Subsoils below the topsoil layer should be scarified at least 4 inches with some incorporation of the upper material to avoid stratified layers, where feasible. 2. Mulch planting beds with 2 inches of organic material 3. Use compost and other materials that meet these organic content require- ments: a. The organic content for"pre-approved" amendment rates can be met only using compost meeting the compost specification for BMP T7.30: Bioretention Cells, Swales, and Planter Boxes (p.959), with the excep- tion that the compost may have up to 35% biosolids or manure. The compost must also have an organic matter content of 40%to 65%, and a carbon to nitrogen ratio below 25:1. The carbon to nitrogen ratio may be as high as 35:1 for plantings com- posed entirely of plants native to the Puget Sound Lowlands region. b. Calculated amendment rates may be met through use of composted material meeting (a.) above; or other organic materials amended to meet the carbon to nitrogen ratio requirements, and not exceeding the contaminant limits identified in Table 220-B, Testing Parameters, in WAC 173-350-220. The resulting soil should be conducive to the type of vegetation to be established. . Implementation Options: The soil quality design guidelines listed above can be met by using one of the methods listed below: 1. Leave undisturbed native vegetation and soil, and protect from compaction during construction. 2. Amend existing site topsoil or subsoil either at default"pre-approved" rates, or at custom calculated rates based on tests of the soil and amendment. 3. Stockpile existing topsoil during grading, and replace it prior to planting. Stockpiled topsoil must also be amended if needed to meet the organic mat- ter or depth requirements, either at a default"pre-approved"rate or at a cus- tom calculated rate. 4. Import topsoil mix of sufficient organic content and depth to meet the require- ments. 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 912 More than one method may be used on different portions of the same site. Soil that already meets the depth and organic matter quality standards, and is not com- pacted, does not need to be amended. Planning/Permitting/Inspection/Verification Guidelines & Procedures Local governments are encouraged to adopt guidelines and procedures similar to those recommended in Guidelines and Resources For Implementing Soil Quality and Depth BMP T5.13 in WDOE Stormwater Management Manual for Western Washington. This document is available at: http://www.soilsforsalmon.org/pdf/Soil BMP Manual.pdf Maintenance . Establish soil quality and depth toward the end of construction and once estab- lished, protect from compaction, such as from large machinery use, and from erosion. . Plant vegetation and mulch the amended soil area after installation. . Leave plant debris or its equivalent on the soil surface to replenish organic matter. . Reduce and adjust, where possible, the use of irrigation, fertilizers, herbicides and pesticides, rather than continuing to implement formerly established practices. Runoff Model Representation Areas meeting the design guidelines may be entered into approved runoff models as "Pasture" rather than "Lawn." Flow reduction credits can be taken in runoff modeling when BMP T5.13: Post-Con- struction Soil Quality and Depth is used as part of a dispersion design under the con- ditions described in: . BMP T5.10B: Downspout Dispersion Systems (p.905) . BMP T5.11: Concentrated Flow Dispersion (p.905) . BMP T5.12: Sheet Flow Dispersion (p.908) . BMP T5.18: Reverse Slope Sidewalks (p.937) . BMP T5.30: Full Dispersion (p.939) (for public road projects) 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 913 Fdojvirr - .r u ' 0[2aitrir1i) be (Grross—ice icucJ,) Mulch17 - ` (:®J � is 1, E , • Loose soil with visible dark ; organic matter - . . _ ,,, 'N,1/47fri 7 , . „ •7 ... . . . r y..� „ , . . . .... . . : ‘. .... . .. 4 t.. .... ,.. _ . , .. . .. . _ , . .. , . . . , , . . : . . t . Loose or fractured subsoil Reprinted from Guidelines and Resources For Implementing Soil Quality and Depth BMP T5.13 in WDOE Storm water Management Manual for Western Washington, 2010, Washington Organic Recycling Council NOT TO SCALE limillaill - 11111 Fig ureV=53. 3 gigiOMI Pilanting Bed Cross-Section DEPARTMENT OF Revised January 2016 E C 0 L 0 G N Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 2014 Stormwater Management Manual for Western Washington Volume V e Chapter 5 - Page 914 BMP T5.14A: Rain Gardens Purpose and Definition Land development projects may not be of sufficient size such that it is practical to con- struct engineered stormwater facilities for flow reduction and pollutant removal. However, the cumulative impact of smaller development projects on the natural hydro- logy and water quality of local waters can be significant. To reduce that cumulative impact, small projects (see 1-2.4 Applicability of the Minimum Requirements (p.35)) must implement on-site stormwater management BMP's (See 1-2.5.5 Minimum Requirement #5: On-site Stormwater Management(p.55)). Rain gardens are an on-site stormwater management BMP that can provide effective removal of many stormwater pollutants, and provide reductions in stormwater runoff quantity and surface runoff flow rates. Rain gardens are non-engineered, shallow, landscaped depressions with compost- amended soils and adapted plants. The depression ponds and temporarily stores storm- water runoff from adjacent areas. A portion of the influent stormwater passes through the amended soil profile and into the native soil beneath. Stormwater that exceeds the stor- age capacity is designed to overflow to an adjacent drainage system. Applications and Limitations Rain gardens are an on-site stormwater management BMP option for projects that have to comply with Minimum Requirements #1 -#5, but not Minimum Requirements#6 -#9. For projects electing to use List#1 of 1-2.5.5 Minimum Requirement#5: On-site Storm- water Management(p.55), rain gardens are to be used to the extent feasible for runoff from roofs and other hard surfaces unless a higher priority BMP is feasible. Infeasibility criteria for rain gardens are the same as for bioretention. Please see Biore- tention infeasibility criteria in BMP T7.30: Bioretention Cells, Swales, and Planter Boxes (p.959). Although not required, Ecology recommends installation by a landscaping company with experience in rain garden construction. Rain gardens constructed with imported compost materials should not be used within one-quarter mile of phosphorus-sensitive waterbodies. Preliminary monitoring indicates that new rain gardens can add phosphorus to stormwater. Therefore, they should also not be used with an underdrain when the underdrain water would be routed to a phos- phorus-sensitive receiving water. Design Guidelines Refer to the Rain Garden Handbook for Western Washington (2013) for rain garden spe- cifications and construction guidance. 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 915 For amending the native soil within the rain garden, Ecology recommends use of com- post that meets the compost specification for bioretrention (see BMP T7.30: Bioretention Cells, Swales, and Planter Boxes (p.959)). Compost that includes biosolids or manures shall not be used. For design on projects subject to 1-2.5.5 Minimum Requirement#5: On-site Stormwater Management(p.55), and choosing to use List#1 of that requirement, rain gardens shall have a horizontally projected surface area below the overflow which is at least 5% of the total impervious surface area draining to it. If lawn/landscape area will also be draining to the rain garden, Ecology recommends that the rain garden's horizontally projected sur- face area below the overflow be increased by 2% of the lawn/landscape area. Underdrains Ecology does not recommend the use of underdrains for rain gardens. Design and con- struction of an underdrain system likely requires professional expertise. Where a muni- cipality intends to require or allow underdrained rain gardens in areas with initial infiltration rates between 0.3 and 0.6 inches per hour, the invert of the underdrain shall be 6 inches above the bottom of the aggregate bedding for the underdrain.A larger dis- tance between the underdrain and the bottom of the aggregate bedding is desirable, but cannot be used to trigger infeasibility due to inadequate vertical separation to the sea- sonal high water table, bedrock, or other impermeable layer. Ecology recommends that the municipality establish standard design specifications and drawings. Maintenance Please refer to the Rain Garden Handbook for Western Washington (2013) for tips on mulching, watering, weeding, pruning, and soil management. The "Western Washington Low Impact Development(LID) Operation and Maintenance (O&M) Guidance Docu- ment" may be consulted for more detailed guidance. BMP T5.14B: Bioretention Purpose and Definition Bioretention areas are shallow landscaped depressions, with a designed soil mix and plants adapted to the local climate and soil moisture conditions, that receive stormwater from a contributing area. Bioretention provides effective removal of many stormwater pollutants by passing storm- water through a soil profile that meets specified characteristics. Bioretention can also reduce stormwater runoff quantity and surface runoff flow rates significantly where the exfiltrate from the design soil is allowed to infiltrate into the surrounding native soils. 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 5-Page 916 11 1111111 MIN 201705020028 AUDITORS CERTIFICATE Skagit County Auditor $166.00 .48 NOR FT [ j\ T Q A IE T T 5J212017 Page 1 oP 311:40AM RECORD OF SURVEY AT THE--lit I... OF DALE K. HERRIGSTAD 1 & lJ .et' l'- SECTION 22 TOWNSHIP 35 NORTH, RANGE 1 EAST, W.M. != '°` CITY OF ANACORTES, WASHINGTON f ��-••. 7 N ..4 . GENERAL INFORMATION _ ',,, .. SKAGIT COUNTY TREASURERS CERTIFICATE DEDICATION 1. Assessor's Account No.s 350122-4-004-0000, P31681.. I certify that all taxes heretofore levied and which have become a lien upon the Know All Men by these Present thggr:- K,4 T STA BAI , 'if ortgage holder, and 2. Description and exception information is from the 3rd lands herein described have been fully paid and discharged accordin• 48 NORTH ON FIDALGO ISLAND, LL , pcbpertyr< wr 6r- of the t4nd hereby platted, Revision to Subdivision Guarantee, Order No: 153377-OA, records of my office, up to and including the year of 20 /7 . Jt®s•S a,gi avenueselarethis plat and d die met t er of�tr all f&rev.,,F-r, streets and dated March 7, 2017. f F,. rss• Or :poses This property is SUBJECT TO and TOGETHER WITH A(,� �y OFFICIAL Capt�4c purposes consistent m % with the use thereof for .iblic 14.0wdt;:pu oses .t0 et rr with the right to make easements, reservations, restrictions, covenants and other Certifie this 71 dayof 20 _/7. !� �� "`' it instruments of record includingbut not limited to those - � � � all necessary slope for cut',. aid r$;Js urn �'i�.e .;�J'CS-��d blocks shown hereon in . • IIIIII the original reaso to grading';'bf 1, suet, stl"ets::`and avenues shown hereon. instruments referred to in the Subdivision Guarantee 1 1 • The Owners an kheir'`,a;si rid hereby'� raivel;.alt__'claims for damages against referenced under Note 2 above. Said report lists documents I♦ g 't g g Skagi Coun y Tea Ter � ��. which may be 6�pa�' ne't#��:;�o".;,her 6��ac�t pi�i"berties by the construction, recorded under Auditors File Number AF 732440 (Avigation f® SEAL 4. drainage cw it-,,matt ; .;�.e af, ail , rNsi 'e td or area. Easement), AF 200807220033 (Record of Survey), AF CITY OF ANACORTES APPROVALS Of was'n�o ;," _ 201607050142 (10' wide Puget Sound Easement over new The Planning ommis``$$ion of h City of Anacortes meeting in regular = utilities), AF 201612060089 (10' wide Puget Sound Easement session on - 2l1 "' a� did find that the 48 North Plat & = '. over-new utilities), AF 201612190147 (Covenants, Conditons PUD serves the public use & in erect & has authorized the Subdivision •` - :.. and Restrictions on adjoining property) and AF 201702240096 Administrator to execute its written approval. .V3, 1g9RTH ON 1.71D `_, I ND, LLC (access and utility easement over Lot 17 as shown on the ty � ;""` '' Plat). Deed of Trust recorded under AF 201605130083 Signature of Planningr' � Director =: �' ., •.;�: i' (Skagit State Bank). Approv I by the until of the, City of Anacortes, WA, this = 1 'i` "` \` -- 4. Residential Low Density (R2). =J l day of `n ti C in 20 S IT r SANK 5. Water Supply: City of Anacortes. / :. 6. Sewer Disposal: City of Anacortes ATTEST: City Clerk C-1�/ ` ,?? �;,:, S4atel of Washington 7• Storm Sewer: City of Anacortes . - '-r., r`oursty of Skagit �1^- ' Examined a approved this Z day of APC 1C� ", 20 I ::r':,. "' I rtify that I know of have satisfactory evidence that £ Sl 6et. .�:s'gned this instrument, on oath stated that `�/shef) (wa /are) authorized to execute the instrument and acknowledged it as the Mew Mewt hew' of Citjr n e V: i!;. 48 NORTH ON FIDALGO ISLAND, LLC to be the free and P. :;I. 1 voluntary act of such party for the uses and purposes mentioned in the instrument. Given under my hand and official seal this `le day of 1 , 20 17 . .r;. '�:::;,::;•..,;_> Notary Public in and for the State of Washington ,), ill _ Name printed ( t)1 '1Y1 1 L t'J t.tt vQ� �,ti``D,,.rWF11i,, Residing at Y1ptC f 4C z WA -..t.'\Ss�ory eX,,, -.)- NOTES : _ _ -�:�� F- My commissions expires -k/t / 2.01E �; �,pYARr 1. Subject to Declaration of Covenants, Conditions, = = r•Ue�,-G • _ Restrictions, (CC&R's), recorded under; - �`• qp Flit_al•o^ 'C�: AFN POI 17 O60cOO2, 1 - FND MONUMENT IN ,F „`:.. „:%ry- <='= CASE WITH COVER 2. This plat is subject to the Tree Preservation Plan dated .. = 8820'05,:; '' 2610.39' 2-19-2009 August 12, 2015 and recorded under; 2:� , �_ ;� 652 60 State of Washington O RiC = County of Skagit ` j ' ,p �c\I N Q� I certify that I know of have satisfactory evi ence that C�'lf:(�1 �Yedll_t.t� '� �� ' q O signed this instrument, on oath stated that (/she/) on/are) authorized to execute the G Co O __ 88 39 46 E r"� instrument and acknowledged it as the 1�1 LeL �tCpSideri1 3. The PUD reference number PUD-2015-0003 and date:cif ; � � `"/-•�•- - � COc � 9 of approval shall be included in all deeds and contracts. ^ :. 655.36' 655.36' SKAGIT STATE BANK to be the free and O >: LOT 2 �� iQ O voluntary act of such party for the uses and purposes mentioned in the instrument. 5-c =`r=, LOX O Given under my hand and official seal this 2t'w day of Ap i 1 20 1 4. View Protection Covenant under Auditor's.; =2. = NCO CO. . N Notary Public in and for the State of Washington ::.; ;`�� S ITE printed . � l File No. - T- ..;�;.. - � :..:-• �: �•� .� .��: Puri rr,� q! €'`' A /�— N Name eLt"In D L. 1ti�lt i vet- ,�` �,WEt� To be reco►rdeo! c,r _ ro / `� Residing at AV''X Or 5, LO A .-;=..0.66\on Ex,,;gF9 :' �o/ 504. 12' ' CO 1 My commissions expires /1 / 2-D i a U�<4 -- s _ :r 4o r 658. 13 ca I - �o= =,,e?'>> ;� S 88°59'17 n E " 812. 14' —J c\I c5 • -'' � o 20,0:�,; i,ts N S 88°59'17" E '�,,'9��-Ill-w b.S'\\; 1316.26' ,�; ' ' - 1316.26' rrrrrrr„�l� 1/16TH t,(-) `0,9lA))UJA)➢llplA))IUpUA)1)U)1A11U��j�l SURVEYOR CERTPEIMMTE--, CORNER �- o (f) Ni.---,,,„i;F wAsy'cs� I h • by crtifya that the 41 North Prat & PUD is based upon N- N �f' tj l /y z` / �ff► any'-actl�al s¢. rvej_ and subdEvisiOn performed by me or under my -. rn FND MONUMENT IN Q , / '! supe,visi n o' Se-upon 22,,=Tow1nship 35 North, Range 1 East, CASE WITH COVER m- `� o,�=-- pF 27ao7►� 's' W.M.;'k-the';Plat'£ a'''tr -'`and'`correct representation of the land FCALCULATED CORNER d- 2-19-2009 �'sS'gv.H .o • ff .ik '= uallysur eyeir -:: r�.t..,t, '°'courses and distances are shown C� O aL LAN ` ::: or`r ewl�!,;'sin`` e ground and that I have complied with the 1327.27' (r) 132727' 22 23 OWNER/DEVELOPER LAND SURVEYOR �� �:�iratiS ons`-' f t statutes and platting regulations and that ®� �rrrrrrrrurrurrrrrarrrrrrrrrrrrrrrrrrrmrrrrrar Permaneht_.r:cont l monuments have been established at each ° , „ ~I� 4$ NORTH ON FIDALGO ISLAND LLC DALE HERRIGSTAD PLS Gl�.,.Z.4..�Q�f `-, .and,every '66E`-oiling corner of the parcel of land being S 89 37 49 E 2654.53 27 26 __ PO BOX 319 4320 WHISTLE LAKE ROAD ba`i%!,k. . ANACORTES, WA 98221 SHEET 1 OF 3 - , �"�: - �- _r - � >,h' ` SHIP ANACORTES WA 98221-„, , SECTION � � TOVV ` ?.. DALE K. HERRIGSTAD, P.L.S. Certificate No. 27807 i 1 35N A\ C E 1 EAST, W 1/ PUD — 2015 - 0003 PW # 1 0 - 005 -D E V 7,„. -1/2._ .., .. ,p- Date A P LZ. 1 ! 2.D17 DWN BY: DKH \ HERRIGSTAD ENGINEERING & SURVEYING SCALE: NOTED SCALE : \ DATE: APRIL 2017 4320 Whistle Lake Road, Anacortes, WA 98221 (360) 299-8804 JOB 2015-53 1111010,17011411.1110121181148 NORTH PLAT & PUD SECTION 22, TOWNSHIP 35 NORTH, RANGE 1 EAST, W.M. Skagit Co u�djf�t;.., ^2i: `' 3 40AM Sia/z9, CITY OF ANACORTES, WASHINGTON - '� LOT 1 ( LOT3 • I :::�. ,. EASEMENT \OTE I P31682 I '`', ;. • P31583 SHORT PLAT ANA-98-002 AF#9806220012 CURVE TABLE .;'.. A PSE EASEMENTS UNDER � I - -"'_ •��'-'=� "` AUDITORS FILE NUMBERS �� 0 N 88°39'46" W 316.28' - ` '` - l '' 201607050142 & o / �Q' 35.23' c ""��, tt 75,12` 75,59' 133,334' n NUMBER RADIUS ARC LENGTH DELTA ANGLE:;; ,: NUMBLR'''2;:RADYGS ARC LENGTH DELTA ANGLE 201612060089. Q ;`� , SF 20' SETBACK © - - r ° r , _ ° 10' SETBACK Cl 670.00 83,10 7 06 23 ` •,C. : - 80.00 =4 30,43 21 47 32 _�,•`- Zs c,. - 10' PRIVATE 30' SETBACK ° ' , ° Q �tiC, ,�� h % \v� • • 4 C2 67,50 165,72 140 40. r ' 2,g,, %to 5.15 3 16 54 v '� SD ESMT v Zo ° h JF �� > C3 57.50' 89.13' 88 44Tg-- Ca AO; '� 52.06' 33°08'26' ��, °��° ( �o N 10,690 SF I C4 57.so' 90.09' 89° 6 ,`: , c` ' ° ' 4 <,: �'£30`� :..0 ; `;00 29,15 18 33 35 - , / 7861SFo 1410 I ° r:; r«'' ° , oP o� �' 8007 SF 14pg o CS 67.50 64.77 ''' 58 ` 5 ;;�, 647,50 39.20 3 28 07 Q` a� oti / ter. N 88°39'46' W C32= " ` 20.00' 10,06' 28°48'20' � \ ��' / ro ter- 1406 � •• � C6 670,00' 8310' ;.7'l,�'�4�?:: - j\' 'c 10' PRIVATE ��"'S. J 10' PUBLIC 3 112,28 C7 687.50' PAT 7' _ f €1 '84';_ `' 33 20.00' 22,64' 64°50'58' P 6 i UTILITY ESMT I C8 687,50' ��x7,6� `, '`':'_3°U R4' :.: '''C34 20.00' 26,36' 75°31'21' •i1 O1 o\ / /SS ESMT1 F` ` 1 14 I.: , ' P ° ' .- r r ° r ' �V- c�� r��� AGE ,�5r pis A A 5 I C9 50.00;. 12 ;76'= 1` J FOU�= _ C35 20,00 6,33� 18 07 56 �\�� S P� �5� lr`� s 7755 SF/ i� L1 N 8092 SF ^ C10 40 JU' ; 62.G6; 884.1-48 F41 C36 647,50 39,01 3 27 06 `oP�C �P\.,,,,,"fir � \ ' , 1404/Q,'i/�\ G,c _ c\N 1414 `° C11 40,(t , 62.67'`'' :. •`; 89° ,`,,Li C37 522.50' 69.86' 7°39'39' �',.�� A s� A�\ -0,.. 'utsi ��/ G�� '� \ C12 ;;;::.::•••.-.:; 0,00%, '.;;, 18,11' 20°45'08' C38 522,50' 20.00' 2°11'35' S F \ S r• o F` /� \� C2 \L2 ° r ° r ' Q� P � 65\ F l �� x/7, rFrj�D /74 ��Off' \ N 87 47 58 w Ct `_ 5 D0 _29,87 34 13 48 C39 522.50 125,40 13 00 15 �c`P A,i�Y ep2`' �, C.• \\ GOF `ts� \ % V" r. C9 \ nj L3 86,60' w :e14_:::,:..<: ;: 0,00' 55,21• 01:'•' 22°24'53' C40 552.50' 80,82 8°22'54' O\� tg2k, °`` P N�°` " cr F \. 4 10 �\ I� Cl� 90,00' = • ' 19°06'00' C41 552,50' 44.58' 4°37'21' 5"'" g ' \ r �� 3 / SETBACK 1 6 I -:>✓l ;:. 90,0( , 65,57 41°44'31' C42 670,00' 34,52' 2°57'07' 1� O S 5 . r*� "Dy y "\�P' / �'�9�>�\rl `F ` .19* ROC1 Ro = \I 1 �.,.:.:,:. 1,7 9o,oa: ; 30,00` 19°06'00' LINE TABLE '' �'� 7682 SF '�'��=' �P a,I '�S3 \ o . 1 30 1 ., `'`' 9 30.16' 19°12`00'0-F I 1 c' / 22 F ti°� c, 8155 SF I • ; 1416 ,< ,-'' `'� ; `'� �l .,.?,,,- 'V0,0" 30,02' 19°06'36' NUMBER BEARING DISTANCE ���� `'' �•2°��g �� s 7558 SF � °ii �, I a1417 I l ' =-BI'I00' 39.50' . 28°17'27' Li N 29°29'13' E 21,20' 4• yQZ���P srr1610 ,4- G �/ o I 22.50` I ?. t ° r ° r NO LEGAL FOUND `2, s ro(j ,\ ...- ;.••,� In Im I7.5o ROW ;;; 80.00 33,75 24 10 07 L2 N 29 2913 E 17,30 O 1 �� �s y 43\ P�`:. .s S 88 5917 E 1 ItOW .,100.0o ,, C 2 80,00' 34,21' 24°30'00' L3 N 34°46'17' E 34,11' 1. I 8129 SFr F / 22.50' /C6 �`` >,,�y ``' 113.37' I = -�ti. -'1 Ce3 80,00' 16.55` 11°51'16' L4 N 60°33`11' W 20,02' I o ROW :::C F' l cu 10 PRIVATE o "`"" I © h 608 c� 7.50' 'i Z `��i' o /_SS & SD ESMT I i '� - 'J C24 80,00' 23,74' 17°00'00' L5 N 39°30'43' E 22,27' 10' PUBLIC / / �� R0. .--.2i r o I o {1 7500obi = Fr' n' " C25 80,00' 30,02' 21'30'00'� L6 N 39030'43� E 22 22' UTILITY SMT�/ G :--- i TRACT CI' g I =.I m.., 1418 '= I C26 80,00 41,16 29 28 39 L7 S 88°59'17' E 40.64 N 6oel l l& / // 6552 SF I 7936 Sr °'4:: L8 S 54°30'43' W 16,82' 4,., °',_I / - C5 G..'Sj 1419 I .:t,N`' :7.!r.05 .:,r w NOTES p / �, / S 88°59'17' E • I S 885917 E �r - '10 : ' r P56562 I h M� :='/ 116.27 I 113,37'.,: '"''';.. 1 • _{' I 1. SET CONCRETE MON WITH BRASS CAP IN CASE WITH COVER. 606 .° " 10' PUBLIC r I �'I to 2.• SET RE-BAR AND RED CAP PLS. #27817. 7500 SF i I" I I UTILITY 83 I N.• -'1":; d'f; I 8 3.0 FOUND EXISTING REBAR AND CAP MARKED PLS #9569 OR AS NOTED. aj ESMT I N 28 ynl `L' N I VISITED 1-4-2017. © SS1 PRIVATE' n-' 5287 SF o ' er a = "''' 7500 SF uc,- w 4. EQUIPMENT USED: CARLSON CR2 2" TOTAL STATION. & SD.ESMT u�, A I n I - 986. SF w: It r N ^ h605 x.��` ,, � �' 1420 5. ALL CONCRETE MONUMENTS WERE VISITED ON 2-1-2017. 6�'�j, o: NI ` 91 ,,;" ; "z.:: I Cu 6. ERROR OF CLOSURE MEETS WASHINGTON STATE SURVEY STANDARDS. 11(? f °' !✓I .� i S 88'59'17' E I '.S $'5v''17_.: :E ''`� .. I -:=" I N 87'47'58' W _� 7. SURVEY METHOD: STANDARD FIELD TRAVERSE. °° r,, 117.78' I ' 100.00' 8. BASIS OF BEARINGS: Record of Survey, AF 200104030063. N. 19 r oIt. '=.,tz, I 3;3 'fi N I 9.1 1ADDRESSES SHOWN ON PLAT. ro ,, 10` PUBLIC u`*, Im 2L� :N I: l o UTILITY ESMT Z 10. SEE SHEET 3, PUD AND PLAT CONDITIONS #2 FOR BUILDING SETBACK 07500 SFo :_ ,�,' I ,, �, n 9 REQUIREMENTS. © o o 818 = Sir o ':._ gi-14.(11 N 1 fiO4 �I o N. I� -- -,,f. ,1' ^ ;'.tP,I = 9 -.;:�F 7500 SFI p 6 . ,;; `.�-1-1 '- 5f15'i I 502 �� 3 11� e'.°'w�I ^ 22.5o'I s aa<s9` ' E "'s 88°59'17' E h I OFFSET PROPERTY CORNER NOTES C9 Z r„ p0, 17 t `v`. ' -- -. I • N 87'47'58' W REBAR & CAP SET 1.00' S 32'20 58 W OF Z Q d ni ROW ROW :,; 6,0 :•_., , ;,;/ 113.37' , ,- ao 100,00 aCl� In 2- V 18 -,:'#: 'I'',.i:: . 31 :. ;.`` Vi c I o I TRUE CORNER DUE TO FENCE. co ;so o `�° ',. :: I : .:'MI" ��' 8 6 �, m 10 `-'4 0 REBAR & CAP SET 1.00' S 1'20'14" W OF 0 1 7781 SF • ; .N -" I := ., a " N 8175 SF I I TRUE CORNER DUE TO FENCE. I 116021 1,• `'' .\�;: ' :15T �IN I 7518 SF o Q REBAR & CAP SET 0.75' N 1'0'43" E OF 1505 1..j1-"3 0 y - N. 20_,.SET,_ACK z 1,/ o/ 15041 I n ^ TRUE CORNER DUE TO FENCE. ,,,»»»»,,,»»,»,,,»»,»»,»,»»,,,»,,,ro,,� ' 1" '' L10' SETBACK \° c�/ ® REBAR & CAP SET 0.50' N 13'21'22" W OF J N 88'S9'17,;''1d ;- L: t; \c . 74,35' T 74,19' / G / 87 `58' I a0� TRUE CORNER DUE TO FENCE. t� 4RRI 921& _,;'`" A. C3 N °47 W 0 REBAR & CAP SET 1.00' S 62'27'00" E OF �_' of Asy' ��� "` LATITUDE 109.56' v - FIND REBAR & PRIVATE 20' SHA'r D✓1 E. } e5' - E CIRCLE ... A,� TRUE CORNER DUE TO FENCE. �yl, �I ? , CAP HERRIGSTAD �G` ` ' , it UTILITY;-:E: MI AF 2'I7 4�€3 6 N 88°59'17' W �',`-' I ® REBAR & CAP SET 1.00' N 58'29'41" E OF =, /: �► =/`1 l a \ c I48,54 /0 11 I TRUE CORNER DUE TO FENCE. �o�:. z ao� o ���� ;�; N. ,_ 7 L°�� 24 Gti�� s 0� 8054 SF o V0 07 REBAR & CAP SET 1.00' S 2'12'02" W OF Fss�-.�rsT ::sga =fig _ L5` _ 39.i8'* 80.00' 29,36' C2-L• • co\ ��.-o, I n .T CORNER DUE TO WATER METER BOX. �Ar �A"° �' `10' SETBACK 10' PUBLIC \ >> 11506 Q A ••'-`- t,,' . UTILITY ESMT 1 13 �'26r �`9\ ��3 ''��Irrrtrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrtrtrrrim�° . 17 1 S J a s� F�,\ N $7°47`58' W:,_ � , � � 16 w 14 .- PS6s7 i, !u 441__:: a �1, 94,51' Y;: . ,-, J 4 8092 SF % 7930 SF � 8000 SF a 7617 SF F h- 45 I OWNER/DEVELOPER LAND SURVEYOR y:- 15�� '_,;,..: 1518 0_ 1516 1516 . .. 1514 4, `' h512 �IW I GRAPHIC SCALE 48 NORTH ON FIDALGO ISLAND LLC DALE HERRIGSTAD PLS r^ - _ ^ I 8849 ci SFI 25 - 0 25 0 100 PO BOX 319 4320 WHISTLE LAKE ROAD - • •:�:.,• _-_ 30' SETBACK - � nil 00 '; 31,r -4-1 1510 `o - - -( FEET ) ANACORTES, WA 98221 ANACORTES, WA 98221 `' --,,:, 75.00' 89.08' 0 I-� �I _10` wA ESMT I 1 inch = 50 ft. ,; 80.00' 80,00' 76,06' a z 103,98' 34.0' r TPOB SHEET 2 OF 3 `' 1/16TH 3 S $8°5917' IE 504,12` 0,- CORNER * NO STRUCTURE ON / `'s: �' 'LOT 15 SHALL BE CLEARIDGE DN. II P82597 P82596 AF#8204220013 PW # 16 - 005 -DEV -,,,,.. �� � TALLER THAN 25' r / PUD - 2015 - 0003 ; :`' _ I FROM THE NE P82593 1 I CORNER. P82595 P82594 / DWN BY: DKH SCALE: NOTED '=' = / HERRIGSTAD ENGINEERING & SURVEYING 1 / DATE: APRIL 2017 4320 Whistle Lake Road, Anacortes, WA 98221 (360) 299-8804 JOB 2015-53 .:.,ftk. 48 NO ETH PLAT & PUD minui ,i-iiiiimulman SECTION 22, • TOWNSHIP 35 NORTH, RANGE 1 EAST, W.M. Skagit COnty Ftiidtgr $16 i2Ol Cage Ai. 3'of 311:40AMAM CITY OF ANACORTES, WASHINGTON = PUD AND PLAT CONDITIONS LEGAL DESCRIPTION _UTILITY EASEMENTS 8c DEDICATIONS -�` `'` 48 NORTH PLAT & PUD and ACCESS •� -:. �- -�=� =. '���:• PUD-201 5-0003 1 . An easement is herebyreserved for and conveyed to the CITY OF ANACORTES, Thatportion of the South 1 2 of;: a ,Atdi heast '1/•, or"' the Soii'tir-. t .• 4, of Section 22, Township Y / / .. ..�;: i PUGET SOUND ENERGY INC.(A.F. NO. 201607050142 & 201612060089), FRONTIER 35 North, Range I East, W.M t;-°tyin9J outhea ly or tile 'BURROWS BAY ROAD", EXCEPT the "COPPER All parcels within the subdivision are subject to the "Findings of Fact and COMMUNICATIONS TELEPHONE COMPANY, CASCADE NATURAL GAS COMPANY, AND MINE ROAD" along the East`'i1'ne ereof,_A4v`D EXCEPT tlik.fo11 wing described tracts: Conclusion of Law" as adopted by the Anacortes City Council on the 21st COMCAST CABLE TELEVISION COMPANY and their respective successors and -i . . :r ''A. dayof March, 2016. The followingConditions were required to be �`. ' ' q assigns under and upon the front ten (10) feet, or as shown on the plat, of a.) Beginning at t��"�Sott-t{�east`' 4�mer:g;:`:''�he South��i'�? of'�the Northeast 1/4 of the Southeast 1/4 identified on the face of the Plat. front boundary lines all lots, tracts and spaces within the plot lying parallel with of said Section; �: " i, _ _ ;s` 1 . (FF 10 The lots in this subdivision are to applicable 2. and adjoining all public street(s), as shown on the plat, in which to construct, thence North 88'5946' c est='.-long• '?�►. g ',�e •Sr�tk=•1ine: •t�`said South � of the Northeast 1/4 of the subjectpp ble water, operate, maintain, repair, replace and enlarge underground pipes, conduits. Southeote 4, 30.fi1 fe f to le We&line oLThe "COPPER MINE ROAD"; sewer, and stormwater general facility and hookup fees and transportation, cables and wires all necessary or convenient underground or ground mounted then] continu r Nortfr 88 3 6" vest 7»;8a' feet; fire, and park impact fees. These fees are payable at levels in effect at appurtenances thereto for the purpose of serving this subdivision and other .t the time of building permit issuance and may differ from those fee levels property with electric, gas, telephone and other utility service, together with the -,.' i'!ence �-•1:. R , �11�21 ";t`"as ;6& ;;34' et to the North line of the Southwest 1/4 of the Northeast • chargesmay payable. right to enter upon the streets, lots, tracts and spaces at all times for the , 1 .1 of=•ie ' _':1ts er if att. ce .�,t�e true point ed beginning of this description, said point being currentlyin effect; sewer and water latecomer be a able. �``=_the��'�orthw�st coKner=::�f thafcertam tract conveyed to the Port of Anacortes, a municipal purposes herein stated. 2. (FF #11) ZONING INFORMATION: 9-•-ii. `d rporgtion, l y,:dei reCtic,4 d July 22, 1968, under Auditor's Ale No. 716164; Underlying Zone: Residential District (R2) 2. A 10 foot private storm drainage easement across the North boundary of" , tap ' m said: tnJq .point of beginning run South 2'11'29" West along the West line of said Port Zone's Minimum Lot Size: 7,500 Square Feet Lots 2, 3 and Tract B as shown on the plat is hereby reserved for and it. of Atitcort6s tract:3 distance of 15 feet; Gross Acreage: 7.48 Acres (included 1/2 abutting ROW) conveyed to Lots 2, 3 & 4 for storm drainage to service lots 2, 3 &,, 4=�1-s�•k,:. ' thence llles�;..parallel with the North line of said Southwest 1/4 of the Northeast 1/4 of the which to construct, operate, 4 _ • ',.:.Net Acreage: 7.20 Acres maintain, repair, replace and enlarge ur#3'er rctundi• ir• ' :. Southe._ t Y4 to the Easterly line of the "BURROWS BAY ROAD"; Zone's Maximum Density: 4 DwellingUnits (DU) pipes, thereto for the purpose of serving the lots herein. The marhteriance"•;of '13.01 tyrr#herl alongsaid Easterlyline to the North line of said Southwest 1/4 of the Northeast y per Gross Acre `''.� y Density Calculation: 4 DU 7.48 Acres = 29.92, rounded to 30 DU the improvements to the easement will be the responsibility of and Shared by -,,. 1/4 ,pfrthe Southeast 1/4; the benefiting lots. -. .:-� "thence East along said North line to the true point of beginning. Proposed Lots: 30 Lots +1 Community Park , ; SETBACKS: 3. A 10 foot private sanitary sewer easement acros a thw6st b' undary of`,4!*i ' b.) Beginning at the Southeast corner of the South 1/2 of the Northeast 1/4 of the Southeast 1/4; Front Yard: Lot 1 and Tract B as shown on the plat is hereby..rese ed. for ant1<;,,coi$vvyed.,. : '' " thence North 88'59 46 West along the South line of said subdivision 30.00 feet to the West line of to Lot 2 for sanitary sewer pipes to service lot ?='`in.;< ithich =q,• cdt str' t, -•s�' „ For lots 3-17 only, the front setback is 10 feet for the residence & 20 the "COPPER MINE ROAD", and the true point of beginning; operate, maintain, repair, replace and enlarge unercound pipeet. fad, the • r�aas thence continue North 88'59'46" West 781.88 feet; feet for garages. ° All other lots must meet the 20 foot front yard setback for the R2 Zone. of serving lot 2. The maintenance of the impro!erreents to the'ieasment will be the responsibility of lot 2. "Js thence North 2'11129" East 669.34 feet to the North line of said subdivision; Rear Yard: "'"' `' thence South 88'40'23° East alongthe North line of said subdivision 760.00 feet to the West line of For lots 3-17 only, the rear setback is increased from 20 feet to 30 4. A 10 foot private sanitary sewQv�``& ,.s`torm'-'OrariVge asemeift. .gross the the "COPPER MINE ROAD"; feet. West boundary of Lots 27, 28, 0.8440 ei shorn &n, to "plat A " hereby thence South 018 59 West along said road a distance of 664.96 feet to the true point of 2g • All other lots must meet the 20 foot rear yard setback for the R2 Zone. reserved for and conveyed to lets ; 6, 27, 2 ; :_& ''..:1I ::.:f.QJj dnitary sewer & beginning. storm drainage pipes to service•Mots-26, 27, 2t, 2;f & 30 in which to Side Yard: construct, operate, maintain, repaiet r place and enl rge underground pipes for Situate in the City of Anacortes, County of Skagit, State of Washington. All lots shall meet the R2 side yard setback requirements for the R2 the purpose of serving the lots herein.' );The msiintObance of the improvements Zone. to the easement will be the responsitglityi pf: ;it shared by the benefiting lots. 3. (FF #15) A homeowner's association shall be established and be 5. A 10 food:;private sanitary sewer &''tore drainage easement across the West bounder af, Lots 18, 19, 20, 21 &':Tract A as shown on the plat is responsible for the maintenance of the bioretention swale (Tract A), hereby reserVkl f&r and conveyed to Lots 17, 18, 19, 20 & 21 for sanitary IMPERVIOUS COVERAGE LIMITATIONS landscaping buffer (Tract B) and community park (Tract C). sewer & storm''c lra"rcaage pipes,;+. service lots 17, 18, 19, 20 & 21 in which to Based on the storm water design for the plat the total impervious coverage for each lot is 48%. cc.ctb i,1ct, operate;. ricintain,, ;: pi r, replace and enlarge underground pipes for 4. (FF #19) Pursuant to AMC 16.50.120 (D), the applicant shall record '�,''ie ,,pur0•$Ape of serving�•ttheiotst•: fierein. The maintenance of the improvements notice with the Skagit County Auditor's Office which provides a public t . trib,„.easircent will,*;-be'I'the,_-•fesponsibility of and shared by the benefiting lots. record of any approved tree preservation plan and conservation areas; the =;, '=i; `F.,..; - application of this title to the property; and that limitations on actions.4".;; 6. ;4• A 20 ,bat 8i'`IQ fa•stcst public water main easement on and across Lots 12 & or affecting the property may exist. See recording number on sheet elk. '';';; 13 ': s bowrl.;'io :;,th, :`-°plat is hereby reserved for and conveyed to the City of '"s•_ Ana ;orees..it `. which' to construct, operate, maintain, repair, replace and enlarge 5. (FF #20) This Subdivision is subject to the Tree Preservatinz'"`Prtil�:;, ' unde gro nd pipes for the purpose of serving this subdivision and other property Dated August 12, 2015. Retained Trees shall be maintainet ..�'`by tk ..;.lai ^`' ; *vith vmatkt service, together with the right to enter upon the streets, lots, tracts owners, unless approved for removal by the City of Anacortes, -' '1/4.; 4:14,d saes at all times for the purposes herein stated. 6. (FF #21) The maximum permitted height for Lot: 15 Sialfkbe restricts � i ; 7_ 'An • access and utility easement on and across Lot 17 is described in to twenty—five (25) feet from the high g' "' Auditor s File No. 201702240096. Y g point of tie �?;opet(iyy existing :;_ grade. ,.,, : 8. Tract A is hereby dedicated to the City of Anacortes as a storm drainage 7. (FF Modifications) Lot coverage is r < dific5 from fi? Zsnind'i•D,istrict,.g �"' conveyance and water quality treatment facility. Tract A will be maintained by the 48 North Home Owners Association and the City of Anacortes. The 48 maximum of thirty—five (35) percent•; a;ti+ tt aximrrr of `-=Thirty;, seven and North Home Owners Association maintenance and upkeep requirements are one half (37.5%). lk=: '``' identified in the recorded Declaration of Covenants, Conditions, & Restrictions. .'''- See Note #1 on sheet 1 of 3. All other maintenance and upkeep is the responsibility of the City of Anacortes. lit ''' .:'•1 ',; 9. Tract B is hereby dedicated to the 48 North Homeowners Association for the `" purposes of landscaping and landscape maintenance. '` 10. Tract C is hereby dedicated to the 48 North Homeowners Association for the " purposes of a Community Park to be maintained by the Homeowners Association. v» """"mmannm»»»>;»»»li>r»>���, If g `' - NER � g. Pi P - = 11 . All common retaining walls will be the responsibility and owned by the 48 c .i wgsR/G'�, -'r North Homeowners Association it) E . A 5 foot wide easement across Tract C and Lot '- y'i - '.. : 30 for the length of the wall as shown on the plat map is granted to the5 ) o-.'' s>' - Homeowners Association for upkeep as identified in the recorded Declaration of a i i f/ " II , _ 7 t ,,. " ` • Covenants, Conditions, & Restrictions. See Note #1 on sheet 1 of 3. //= `� o! . 27807 �'� - -` :::; �` OWNER/DEVELOPER LAND SURVEYOR ' & -� Z`'t' 48 NORTH ON FIDALGO ISLAND LLC DALE HERRIGSTAD PLS • ": '"' :. -'" ' arrrrrrr anali rrrrrrrrrrrrrrrrrrrrrrrrrrua;` -'" ' - PO BOX 319 4320 WHISTLE LAKE ROAD -;, ANACORTES, WA 98221 ANACORTES, WA 98221 ;; . SHEET 3 OF 3 PUD - 2015 - 0003 .,. ikb„. .., .ff PW # 16 - 005 — DEY Or DWN BY: DKH i HERRIGSTAD ENGINEERING & SURVEYING SCALE: NOTED DATE: APRIL 2017 4320 Whistle Lake Road, Anacortes, WA 98221 (360) 299-8804 JOB 2015-53 SS MI - `, `O�j CONCRETE �SD � `"`v CURB&GUTTER /� .{\ / ABBREVIATED LEGAL DESCRIPTION: Anacortesontrcl Notes far Residential Construction-City of =. EXIST. S NITARY \ P �G�� \77.777/(Lot11)G` ON�N gINP�RSEWSLINE LOT 12, 48 NORTH PLAT & PUD, SECTION 22, TOWNSHIP 35 s0rpgt ccv.-s �PLOT 11 NORTH, RANGE 1 EAST, W.M., CITY OF ANACORTES, SKAGIT �t,1 pRRFA�SNfIU��R DR / (LWM /� COUNTY, STATE OF WASHINGTON. A. I rasion Control Best Management Practices shall be In place per the ooCP'�CHBP I��yP"9,0 P�, x ` EXIST / ccepted site plan prior to any construction start. y LANDED Ghe erosion control shall be ins ected once a da and modified toeet the surrounding conditions as needed. MU NI TI ES he storm drain system shall be cleaned daily(Section 7-07.3).All \ +` / drainage systems shall be cleaned to the acceptance of the City of EXIST. V 21 � \ j + / Anacortes prior to acceptance of the project. GENERAL N O TES CONCRETE %_/ r� \ / E - G 10' PUBLIC D. Stabilized construction entrances and roads shall be Installed at the SIDEWALK l�J \ + beginning of construction and maintained duringthe duration of the OWNER: lif "- - y �. TILITY EASEMENT eg 9 1 XINN Cmay requiredpadsLANDED GENTRY �_�i: � 11 �� �, N // , �NNECTION project.Additional measures be such as wash to 217. / ,` { c, s- J / (L• 12) ensure that all paved areas are kept dean.No mud Is allowed to 504 E. FAIRHAVEN x %� •�` • J 1\ enter onto City streets. BURLINGTON, WA • 2\ i c. ),-- `•f(� + BMP C105:STABILIZED 98233 ,� .< E. Any soils exposed that will not be disturbed for two(2)days during the ' 1� �r~ 55 ` CONSTRUCTION 1— 360 —755-9021 I. LOT T LINE& 1 / + ENTRANCE wet season or seven (7)days in the dry season shall be immediately ' GNT-OF•WAY LINE //�� )j (SIZE TO FIT) stabilized with the approved ESC methods(seeding,mulching,plastic BUILDING: SD ;' 219.30) �'� covering,etc,) LOWER LEVEL AREA— 1,346 SF �•••• �TG /; - F. Two(2)weeks prior to the beginning of the wet season(October 1), UPPER LEVEL AREA— 896 SF •••. `+ �! ! + all disturbed areas shall be reviewed to identify which ones can be TOTAL LIVING AREA— 2,242 SF ••'+•••` `( r- •1 O. :--CI' `+ seeded in preparation for the winter rains.Disturbed areas shall be GARAGE — 433 SF EXISTING • • i ��! ✓L ` seeded within one(1)week of the beginning of the wet season.A + �S sketch map of those areas to be seeded and those areas to remain STORMDRAIN �o?• `+•�I '� / ( r SITE: LINE TYPICAL — + °��Q uncovered shall be submitted to the Project Manager.The Project TYPICAL l ♦ + �' Manager can require seedingin additional areas in order to protect 9 eq — ` °°♦c '` , �,_�`� �: \` `+ surface waters, adjacent properties or drainage facilities. ZONING: + °e°9/ .0 7� ��. A. s�yO�io� PROPOSED 4" DIA. G. Penalties for an Erosion Control violation are subject to a$300 to R2 — RESIDENTIAL LOW DINSITY ♦ \ ° o + . SANITARY SEWER $1000 fine under Chapter 17.66- Penalties for Violation.Each day is \ 217.6 + • • \`�"&O • . + SETBACKS: ALL SETBACKS IN COMPLIANCE 4 t considered a different violation. GRADE S. ♦°°i \ .n ` ` / WiP4 CITY GUIDUNES ° \ ?l-o 0 + \ SIDEYARDS MIN 5, 15' COMBINED INLET PROTECTION \j `+ •°♦° O `9yys9�c`+ REAR YARD MIN 30' PER C220,BLOCK& / PERGRA C22 ,BLOCK \ °♦ s�s�'o O�GE El') ` FRONT YARD MIN 10, 20' GARAGE TYKE +`,°e 4-?.n e / \` �4-'°y + \ _` •°�'y°Jj?y ��' \` + BMP C233:SILT FENCE ` + ♦°Yi C �\�� \ ` YtRiMtltH51LI J=- HEIGHT: \ ` ♦♦ 9 /,y, \\� \ + FENCING TO PROTECT i MAX. ALLOWED: 35' + QiO�fJ Lc ,1P 9\` �0°1° , • \ DOWNSTREAM PERIMEIERSILILT FENCE 7 PROPOSED:UNDER O O�G d V` o� -/ \` \ PROPERTIES FENCING TO PROTECT ki * + °• �ACj. Q5 i - DOWNSTREAM PARKING: 0. °° '3.�°y rL F, DRIVEWAY \ ` \ 221 3 PROPERTIES 2 IN GARAGE, 2 IN DRIVEWAY + °i° (P) GRAD CHECK DAM PER BMP 7- , `" ` ♦ \ ` + GRADE C207:CHECK DAMS, PROPOSED 4'SCH + + °°e \\ ` `+ AS NEEDED / r . 40 PVC DRAIN LINE I + •• \ ` / 94.50 /�' L 0 T COVERAGE + 46.89 ! BUILDING AREA: + _ _ _ I EXIST 2,163 S.F. °♦ \ ` +i�.x.�x�x.�x�� / = GRADE \ 6. LOT AREA: 222.6 \ ♦♦♦♦ \ ` 221.0D % % X %i�X��, %��X�%•-�%-�,%�%`X-�%-r,% %�X�� '6+ `+`°♦• \ TG n —� 4.00' . x x�x��x��x�x�.X.�x�x�z x.�z��x4 8,849 S.F. + ` PROPOSED4'SCH',., fitp\°♦♦ \\ ° YARD Dr■rruu�r��� r • /` 4700' �— 4DPVCDRAINLINE I PERCENT COVERAGE: \ , YARD DRAIN . _ I LOT LINE 8,849 rr""R■ • oS •C�g+G��O MAXIMUM ALLOWED: 37.5% + ♦♦ : �P 1 •rrrrrr••■ rrrrrr `�' �\� J `� `+♦♦`♦°i •1 ` V Z `� urrrrrrry •rrurr—r�rrrr��rrp �S� P�Ode o LOT 13 �+ ,r ; o �---•-- 11—• ��Q,3?,,P�` IMPERVIOUS COVERAGE ` °i � I + q (�0��a FNCNG AROUNDPLACE TIONO ♦ • m EAVE 6 EXISTING TREE AT DRIP BUILDING. 2,029 S.F.` ♦° : i 1m W OVERHANG LINE PLUS 6'. PI PS/WALKWAY. 134 SF.°♦♦♦ �• COV RED 30' REAR PATIO: 96 S.F.BMP C233:SILT FENCE ` • jPOR H(P) YARD BUILDINGTR/VEWAY 1.171 SFPERIMEIERSILI •,. + •♦ I ER D SETBACKTOTAL: 4,149 S,F.DOWNSTREAM FENCING TO OTECT `°° o ,• ' I IO o PROPOSED HOUSE LOT AREA: PROPERTIES `♦i • > I 8,849 S.F. ♦ • • ¢ BMP C233:SILT FENCE DOWN STREAM SIDE OF o PERCENT COVERAGE: °• se 1Ilk LOT 12 STOCK PILE 4,149 / 8,849 = 46.9% v • 4. +`+e♦♦ '• TG 70 ® I MAXIMUM ALLOWED: 48.0% °i� 0• 223,40FFik x l G I I + I x ! I N h 1 0 + SOIL STOCKPILE LOCATON k�k • EXIST I , I \ EAVEOVERHANG tl BMP 123:PLASTIC COVERING ` o _ GRADE I / I COVER WITH PLASTIC DURING STORM LOT LINE&RLAT 1 x EVENTS AND WHEN NOT BEING BOUNDARY I ` WORKED FOR MORE THAN TWO DAYS o O 10' WAYERLINE _ Q, Z EASEMENT x I 222.40GFF I'' �� i 222.90 FF o( w —" cti �_ — �- — I // 'PROPOSED r , h BMPCPLASTIC FENCE VISIBILITY o to I RO P OS .DTO REDUCE RISK OF PUBLIC x / ENTRY INTO CONSTRUCTION I I ; i GARAGE 11 i sire o GRAPHIC SCALE Iief i I PLACE CONSTRUCTION 6 09 6 12 PRbPOSED 4'SCH j FENCING AROUND co I 401'VC DRAIN LINE -- f I 1 EXISTING TREE AT DRIP ° NI MI a x f r� I I1 LINE PLUS 6'. ( IN FEET ) 0 Hertz. Scale: 1 Inch. = 6 Feet I • anommenem I P, ROSARIO 1 �s . nnnn `� 124.eo I OV RHANG .loos .•••` C� `' 48 NORTH FAO Tc'0� I al I ,•/ ,:��c��No°�I o 3-CAR GARAGE RIGHT /, 4 I ■ • ■rrrr• O GeOS��yP 1 II O rrr■ 1�. Yr _ 0 /_ 2.00 rr rrrrrr■ ruunrrrrr • • a•�+ _ ��51�OJP\ I j ,/ / / i LOT LINEt_ ' 22.�' _ �8S _ �_`_�_ `=o\ JI \" • = ° SITE PLAN 7 �:\NNIN,/ -_ ;/ x in G`�����Q�0 ' 4�OFJ 22.54' j ' O N1S .} CHECK DAM PER BMP u� I LOT 12 (P 133670) �� �� I G`2p5� Op1,o C207:CHECKDAMS, SAN1Tl,SY'SEW R / ° x e4e(3 0 \ AS NEEDED. 0) 1510 LATITUDE CIRCLE s0 1 225.0 ANACORTES, WA I I • C207 CHECK K DAMS,P GRADE o o O V 0 O O 0 0 0 0 0/ 0 0 0 0 0 0 J O 0 0 I 0 Q AS NEEDED. / ' g r JOB NO: PLAT OF "48 NORTH" W O LOT LINE — I V \ 222,2 t Z DESIGNED: LG Z O 103.98' EXIST —.I . BMP C103:HIGH VISIBILITY PLASTIC FENCE I DRAWN: GRADE TO REDUCE RISK OF PUBLIC ENTRY INTO j 3 (jj Ir.kJ CONSTRUCTION SITE DATE: 02/19/2018 O (0 . W Z : ! , _ , 1 • SHEET 1 of 2 0 Q i -SW GM S a MIMED SS LANDED GENTRY 11OMES AND COMMUNITIES 44 1�dS� kilt St Levric s Sea-Craft 0 owes Plc 141 I . 151hst a r') -r`: tot s b 1P11151 Shannon Pain: �nhy� 1 116CA 17th St \t ` Tam S1 5;', nnon Point E Marine Center It"z�`ast �t31�5t l;(n n 211 o a A n o c as �Sd� •�1 At1ti'� co — `N m v s 1 ID Jr�a„llal r°t�tr Q`1 tine �' zn oa�� c°sgo11, t;�Y SITE LOCATION ��, iii , 2611,st ",` -?o - Vask Ship Harbor lnn`4 t\�y1 �" Cranberry .c cs y re �ro� Lake•Park ,,1t Pie - 4 c� - San Judi, ,.iflutes 0 ;° L.l Sunmt Ave' &Insel Ave Sua y^. 3 : 't - 1v111 : il y ) = lgattozf Sr ogee Anacortes ge' 3om si I® fn — tOVJUY AA p Airport a 3130St 0 > m ¢Oy D�f i n <. 2; ox�� a i�ny Stetting of ? n 8 �s" Down ri. w� i - OId.Salt's Deli 8 Market �� S. -3 ANACORTES WA Little _- Skyline'Maririe Center -12 le�e� m°r %N t� bony CO '4 7�, a to o 48 NORTH Skyline Mani, UhC'eor '�Q x IY CIyde ? ROSARIO :,v.ners Assnctotioi, sw3� a ,, ay 3-CAR GARAGE RIGHT cy f}0.„.0 tie Qp �_ too g l€ 4t - Queen Ann 0" at SITE PLAN - 1.,..h- - - LOT 12 (P133670) Map data ©2017 Google 1000 ft ° 1510 LATITUDE CIRCLE VICINITY MAP ANACORTES, WA LOT 12 (P133670) 1510 LATITUDE CIRCLE JOB NO: PLAT OF "48 NORTH" ANACORTES, WA DESIGNED: LG DRAWN: DATE: 02/19/2018 SHEET 2 of 2 A/ a ' ` CONCRETE see �`�v CI RB&GUTTER I1 /, /t `. 41, ei EXIST. SANITARY %' ABBREVIATED LEGAL DESCRIPTION. Erosion Control Notes for Residential Construction-City of es G` V NIN �NP� SEWFFF$LINEAnecarteses ea PRO�GS�TGNa tiR f fp WM,• /7 it LOT 12, 48 NORTH PLAT & PUD, SECTION 22, TOWNSHIP 35see 1tS SSR pS1NFt� • pR't({ (L. _ ' ' , / LOT 11 NORTH, RANGE 1 EAST, W.M., CITY OF ANACORTES, SKAGIT p( 0 GPfGH9 sS. ON x 219,7 COUNTY, STATE OF WASHINGTON. A. Erosion Control Best Management Practices shall be In place per the • lEXt pR . pX EXIST / > accepted site plan prior to any construction start LANDED GENTRY PQQ %'._�j , _ _ "`+ GRADE / B. The erasion control shall be inspected once a day and modified to 20. .,/'� meet the surrounding conditions as needed_ HOMES AND COMMUNITIES j( r � /+ / 3 C. The storm drain system shall be cleaned daily(Section 7-07.3).All 3� 2 r _„ \ ` / drainage systems shall be cleaned to the acceptance of the City of COEXINCRETE U/ ' + E - G 10'PUBLIC Anacortes prior to acceptance of the project GENERAL N 0 TES SIDEWALK f \- D. Stabilized construction entrances and roads shall be Installed at the / \' / , XIST.SS TILITY EASEMENT r beginning of construction and maintained during the duration of the OWNER: 217 1 \ / + �NNECTION dLANDED GENTRY - i r I project Additional measures may be required such as wash pads to x a,x l` l / `+ •• 12) :`= ensure that all paved areas are kept dean.No mud Is allowed to 504 E. FAIRHAVEN 9 ,� BMP C105:STABILIZED enter onto City streets. BURUNGTON WA CONSTRUCTION 98233 �_�: x �`L(3L-0iJE& / SS `+ ENTRANCE • t E. Any soils exposed that will not be disturbed for two G-tJ �F-W6Q LINE i _ -"I a (SEE TO FIT) ) wet season or seven(7)days in the dry season shall be immediately 1-(360)-755-9021 SD 219 3p .,� / \ stabilized with the approved ESC methods(seeding, mulching,plastic BUILDING: • Jf/ •• I TG i 9 covering,etc.) I r•••••••r•` .' ;i) �� ,, r ; ! F. all disturbed aseasoshalr to lhbe e regviewed to ideinning of the ntify l season ones can1), ,346 SF UPPER LEVEL AREA- 1896 SF fi TOTAL UWNG AREA- 2,242 SF EXISTING 2p °` . � ':}--' ; seeded In preparation for the winter rains.Disturbed areas shall be STISTING IN O + s seeded within one(1)week of the beginning of the wet season.A GARAGE - 433 SF .2 + 1 .: LINE1(Tl'PICAL i9'A ` ' sketch map of those areas to be seeded and those areas to remain J + •° + ', J uncovered shall be submitted to the Project Manager.The Project SITE:TYPICAL - r +° Q� \` ` 1 Manager can require seeding in additional areas in order to protect surface waters,adjacent properties or drainage facilities. ZONING: °+°l�'i \ d,�o�io�+ PROPOSED 4 DR. r G. Penalties for an Erosion Control violation am subject to a$300 to R2 - RESIDENTIAL LOW DINSITY + °i ` O//„*-3 �` . SANITARY SEWER $1000 fine under Chapter 17.66-Penalties for Violation.Each day is 217.6 �� ` pGo' + �� SETBACKS: + ♦ \ d, \ considered a different violation. EXIST +♦ �G�` j ALL SETBACKS IN COMPLIANCE GRADE ++ `�l O�y + WITH CITY GUIDUNES INLET PROTECTION + +° �9y�u��G, ; ` �` SIDEYARDS MIN 5; 15' COMBINED PER CPR BLOCK N 4 N +i T6, O G GRAVEL FILTER ` o♦ `po'Q \`�rco �+ / j ��` fRONTYYARDMMIN30D, 20' GARAGE + eG^ielT! \\ \` + \ BMP C233:SILT FENCE \ I `` ++�oOy � \ ` iFJ{IMtItKSILI o HE7GHT.' + ° y22 $ • + FENCING TO PROTECT / I +e 0o p G, \SP �� o°b \ ` DOWNSTREAM MAX. ALLOWED: 35' + C� �� \ ` + PROPERTIES ,--- PROPOSED:C233:SILT FENCE }'EhflMl 1 tk SILI PROPOSED:UNDER +`°eeAjy�o� rL� ft DRIVEWAY \\ ` �+ �a .7"------ DOWN3TTR A PROTECT j /I/ PARKING: 221.3PROPERTIES f/ 2 1N GARAGE, 2 IN DRIVEWAY + ++e (P) \ EAST CHECK DAM PER BMP -- — �-_-� �. ` e \ ` +NW GRADE C207:CHECK DAMS, �� + AS NEEDED. PROPOSED 4'SCH d a+i \\ \ _ �� `� -- 40PVC DRAIN LINE I ;. `°o° = \\ ` 8 94.50' L D T CD l/ERA GE I( / \\ BUILDING AREA: °i \\ ® 30.00' / ° GRADT Z DIN S.F. °°e \ .. -x.�-x�.x. ..x.�x�x,^,x.--.. x� 1 221.00 x�.- -' \� ) GRADE O`J `+ +°° \` TG I x��x..�x��x. .�.x"x x+�x.�.x,.�,x,�,x.�x�.x a� �C'. `+ °se \ �rrrry a`f■rr 4.00' -�x x`x.�x.�x x�x.�x �/ \\� I LOT 8,8 9 SF. • `+ e \ ` y p�RAl �rrrrrr�r 4 w ::::°e. 413 0 li PVC OERAIM LINE ) PERCENT COVERAGE. \ °+♦ \ i` a1\ -_ r • wrrrrr■ • --r" s. OA'. - I LOTUNE oik . • 2,163 / 8,849 = 24:45 �' + ♦♦+. : ` �� J '� rrryr�rrrrrrrov rrrr�� t �aQVC� • MAXIMUM ALLOWED' 375% rrrr rrrrrrrrrr �V� �9 OAP • • Ei cb LOT 13 �f•• bM. J / (.5 ■rrrrrrrrr G�215�S,OP�1° ii, �'♦ r • �� o ``�' �4Q�3?��W` IMPERVIOUS COVERAGE + +e J Q �5• O PLACE CONSTRUCTION N. `e♦ j J j R� EAVE 50�� FENCING AROUND BUILDING: 2,029 S.F. 1 I: OVERHANG ` EXISTING TREE AT DRIP LINE PLUS 6'. • STEPS AUCWAY 19 SF `++°i i CDV RED (4 .30' REAR • PATIO: 134 S.F. BMP C233:SILT FENCE + • PAT70.' 96 S.F. P!_RIMETERSILI \ `+ °+ a POR H(P) UNC• E' D YARD BUILDING QRIVEWAY. ,.871 S.F. FENCING TO PROTECT `+e+i _ :• 4 1 ( PRO SE78ACK TOTAL: 4,149 S.F. DOWNSTREAM • Pc� POSED HOUSE I + • • y • LOT AREA: Ea + + i i I BMP C233:S SILT FENCE PERCENT COVERAGE `+° ry I I'LAttESILI FENCING ON + e • / � v ! LOT 12 ' STDCKPLI STREAM SIDE 4,149 / 8,849 = 46.9% V.* I'd 221.70 dfb + ••i+ i+ TG re Alb 223.40 FF t • MAXIMUM ALLOWED: 48 OX I ''`pfr, 2 � r p CS I C3 IS. I 11 I IllO SOIL STOCKPILELOCATON �� t ¢�221.3 , 1;1 I EAVEµo ' A o ,t 1GRADEXOVERHANG BMP C123;PLASTICCOVERINGV' . LL}} _I COVER WITH PLASTIC DURING STORM LO E'SUBflAT EVENTS AND WHEN NOT BEING BO DARY 10' WA YERLINE jr." I WORKED FOR MORE THAN TWO DAYS O I ` 1 EASEMENT x i-; 222.40 GFF ' tn - _ s 222.9D FF i o I ~ Z z __ t, 1 : II ! p a; • m� x ■' RO P O S E D y BMP Ct03�f HG VISIBILITY ra I ,'1 CPSTICFENCE ^= I i SK OF PUBLIC ENTRY INTO TO REDUCE CONSTRUCTION :AR:. :.:... SITE4 GRAPHIC SCALE 1 x PRbPOSED 4'SCH J. T PLACE CONSTRUCTION 6 O 3 s 12 aaa r�40 pVC DRAIN LINE FENCING AROUND . — I > fl J EXISTING TREE AT DRIP III MI NM ll11 w j I I J € LINE PLUS 6'. i ( IN FEETx I • Hartz. Scale: f Ircch = 6 Feet • `j Q i r\ I 24.80' JI •'e♦°°*•`*•+ O� Nf • • •�P �0b 48 NORTH o •°'' �'�� �G1 to ROSARIO ' `` TG I 1.7...---- e•• Q o��G�°°�J '� 3-CARGARAGERIGHT' ■ • ■rrrrrnrrr • G`�05�lPaI t O1 : % G2.OD' / r■rr~ ugr • r ► gt* QJP�� J 11 iOTLINE L_,_ 22.15' —OS _ - _ o 9 �- x *" G�����G�� w 47.0 �22.54' I • ' SITE PLAN I �J��5 CAP w CHECK DAM PER BMP I 1z� t �ajO C207:CHECKDAMS, PROPOSEDIA LOT 1Z (P133670) Q G DS AS NEEDED. SANIT Y;EWER j : . n : _ . - - - - 1510LATITUDECIRCLE �� __ , t _}, I d ANACORTES, WA x /O 4 _, .x ( CHECK DAM ER BMP �(jsf � �i - `O 4 C O O o 0 0 ��/7 y ` . C207:CH, • ...i .S, GRADE ' 0 0 0 0 0 4 0 c o f 0 o SNEE• . ' • `¢ Ar aLa 0 i LOT UNE JOB No: PLAT OF"48 NORTH" ti Z EXIST taj Q U 103.98' DESIGNED: LG GRADE Q BMP C103:HIGH VISIBILITY PLASTIC FENCE rr DRAWN: to TO REDUCE RISK OF PUBLIC ENTRY INTO ±. le 3 Q CO L] CpNSTRUCTTON SITE DATE: 02/19/2018 VI --Z `., t •- -=-- - - " —' '- - -._tea�i i, `_';x ,i.•=: '•2a ' . II -�iu.�xi r x `c - — f. SHEEP 1 of 2 ;.i'V. -1--- --- --------------- u1oocl I a Gila MOM 1 LANDED GENTRY HOMES AND CODINIUNITIES I I I • fi ri - lOt -. - -- - — , �i iYx*. l` -�-d'�'i ' '9 7_.-:i Y F y -i t� -` ^ i 1�`a1 J !-w •_ _ a' .s a_ r. . w - r'... _ , _ ; C ;3 _ • Lovnc See-Grail 0 oast-, P� - - .ri- 5t oa . . tSlh St - ;-` d — - - .vim st . - 1El7,51 m _ Shannon Point 37lhSt Q _ _ c Shannon Point _i - _ • lair'- _, ; / Marine Center — +�!f} I) 2018 5 o - -_ f.'S; S. _ II _ _ S. - dt1 t ,o' c ,a 0'2' SITE-LOCATION - - rn-je Pond LShip H_ arrbor Inn{5 tV, y,_ _ = Cranberiy L _ J • P:, r -'- San Juan-Airlines 0 -iirL'I L-,.; Buff IM.I- -- • Sig.. a. _ . - - rep S - -- - Iaat{oz1`Sz �t�`�. 4\ : - _ ?'� AnaCortes - r ���,,Ir, Airport --_ EY `' a fin, = Sl err f. nOs _ vim- _ cl' i Z 727. ``�� — Old.Salt s Dell & Market fl 4 r q �a _ _ , g z ��,. r � �� UV —e a tle • r • . Skyline Marine Center, -'y -. 0 f �r , ' • _ Fri, V. J �. :- �fi' 48 NORTH Skyline tvlarina 1 . Owners Association t`ii, cos-� c- �r t-v : a ROSARIO - G 3-CAR GARAGE RIGHT • . 1i!rrm��: p,!. : ,, ism -aGO tgIe . Chico",P.nn 2, SITE PLAN *`•+w. 3. _ _ r� h — - LOT 12 (P133670) Map data ®2017 Goo* 1000 ftr A 1510 LATITUDE CIRCLE VICINITY MAP ANACORTES, WA LOT 12 (P133670) • 1510 LATITUDE CIRCLE JOB NO: PLAT OF "48NORTH" ANACORTES, WA DESIGNED: LG DRAWN: DATE: 02/19/2018 SHEET 2 of 2 ti CONCRETE e� n..a- .- .'=1 ,-._ / 41111111 ,``°c�® �IJRB&GUTTER T \ WM // ABBREVIATED LEGAL DESCRIPTION: ammo OMNI Lot 11) / LOT 12, 48 NORTH PLAT& PUD, SECTION 22, TOWNSHIP 35 �� EXIST.S IGITARY SEWE/R'LINE NORTH, RANGE 1 EAST, W.M., CITY OF ANACORTES, SKAGIT ammoins pR0�0 01 G BPSIN�P - yyM✓ D �N��NSkOspA s�NF\zER ., col /Y L, - =-'' r / LOT 11 COUNTY, STATE OF WASHfNGTON. �® �°yo cPSc EXtSPPROAX. LANDED GENTRY 2096 ' ®` �•'� / LANDSCAPE NOTES: HOMES AND COMMUNITIES EXIST. L=3 ' \., �- / GENERAL NOTES CONCRETE \:} ` E . G 10'PUBLIC PROVIDE (I) TREE (EXISTING OR ADDED) PER 1,000 SQ. FT. OF LOT (9 TREES SIDEWALK �. l TILITY EASEMENT OWNER: 217 \ / MIN, - VERIFY LOCATION W/ BUILDER) W/ A MINIMUM 2" CALIPER (PER CODE. LANDED GENTRY T 504 E. FAIRHAVEN BURUNGTON, WA GRAD '� rq ;� TREES PROVIDED WILL BE A COMBINATION OF DOGWOOD, ALASKAN CEDAR, 98233 k LOT LINE& i y \SS 1-(360)-755-902T VINE MAPLE 4 WESTERN HEMLOCK (VERIFY LOCATIONS W/ BUILDER) VERIFY 'GHT-OF LINT'_ \ BUILDING: ,SD � i \\ TREES TO BE REMOVED IN FIELD W/ BLDR, IF APPLICABLE. LOWER LEVEL AREA- 1,346 SF I \ UPPER LEVEL AREA- 896 SF 4\0p \\ TOTAL LIVING AREA- 2,242 SF EXISIiING ?oo ,� \ GARAGE - 433 SF STO�MDRAIN ?• �� '� PROVIDE LANDSCAPING IN A COMBINATION OF SOD LAWN AND PERENNIAL LINE(TYPICAL _— ' \\\ o- \ PLANTING BEDS TO COVER A MINIMUM OF 20% OF THE LOT (1,710 SQ. FT.). SITE: 1 nPICAL ..`N, \\ VERIFY LAYOUT W/ BUILDER, ZONING: R2 - RESIDENTIAL LOW DINSITY \\ \\ - — - -- --— -- -- --- SEALLASETBACKS IN COMPLIANCE ''''''\.„.._ WITH CITY GUIDUNES SIDEYARDS MIN 5', 15' COMBINED �, REAR YARD MIN 30' \ / 8 ` FRONT YARD MIN 10', 20' GARAGE 7 �\ \ 0 �_�� HEIGHT. ill"' \\ ` / MAX. ALLOWED: 35' A "�C�; \\ / �\ PROPOSED:UNDER �. �r' 'DkjIVEWAY \ �-- PARKING: ARAGE, 2 IN DRIVEWAY \ il / \ �, \\\ , 17.62' 94.50' / L 0 T COVERAGE \ 4i \ 89 \ 30.00' 0 BUILDING AREA: \ 2,163 S.F. `` \ I 11111 LOT AREA: �',` !� �_ 4700' i PERCENT COVERAGE. a y4 \1 .� — - 43�' 4 m I O LOT LINE 2,163/8,849 = 24.4X '\ • 1 r'` ' " _,_� _ ) MAXIMUM ALLOWED: 37.5% \ I /� v............................................1.......„,A' ' lees--- - LOT 13 `> %t. V o — ■ ____I" • EAVE OVERHANG r r COVERED t) 30' REAR -- PORH(P) D YARD BUILDING ., SETBACK \ . I\ II PROPOSE® HOUSE2O18 1 I LOT 12 k . I *. ir,,, EAVE1 ilk �F 3 OVERHANG LOT LINE&PLAT BOUNDARY cc)11 '-- WATERLINE O EASEVENT / i 0 CS • ROPOSED lI GARAGE GRAPHIC SCALE . L 6 O 3 6 12 co N C. Oil li '`)! in--��— w ! 1 I', I it. i ( IN FEET ' Hertz. Scale: f Inch = 6 Feet 24.80' OVERHANG EAVE 48 NORTH / ' I Q ROSARIO -�� I 0 3-CAR GARAGE RIGHT b LOT LINE Lam--_ ,. 2 00' I 1 '� LANDSCAPE PLAN `o � _ 47�' 22.54' I LOT 12 (P133670) ______..-\No €� w�_ _ ie 1510 LATITUDE CIRCLE //// h '--'2 ..R d __.—i- _ Al 1 `� _ H._�•-•...' .Y i2}, I ; ANACORTES, WA r', I I1 I III y / cos NO: PLAT OF"48 NORTH" I � tiZ LOT LINE J L�' �j/ j] DESIGNED: LG D U 103.98 --- -1 L,AZjQ / DRAWN: — 3 Q m - M1 frr DATE: 02/19/2018 L-,0 Cr) F w.� w w 6 i.�e_e rr �;i� c _.A. ``� SHEET +O lu x'� �.._,_ K, .. ----.--....�'�.... -.�'H- TA:,.:�� ti w s ��i .1,• w b'?ti�.-- _"'.r �—w v CT. ._ .1;..:- : 1 of 2 1 } 1/ X l FLOOR PLAN NOTES: ewe i . I. ALL DIMENSIONS ARE TO FACE OF STUD WALL UNLESS NOTED OTHERWISE. 2%. TO COMPLY W/ 2015 WSEC SECTION R406.2,THIS HOUSE (3,041 SQ. FT.) 40'-0" MIMED VERIFY DIMENSIONS SHOWN ON PLANS, DO NOT SCALE OFF DRAWINGS. WILL NEED 3.5 ENERGY CREDITS. TO ACHIEVE THIS, THE FOLLOWING / / ll OPTIONS HAVE BE SELECTED FROM TABLE 406.2: 18'-I0it" 4'-81's" 5'-I115" 10'-51i" - 2. FRAME MAIN FLOOR EXTERIOR WALLS W/ 104 5/8" 2x6 STUDS • IC O.C. OPT, la (.5 CREDITS): EFFICIENT BUILDING ENVELOPE SEE NOTE •I5 / / / / al TYPICAL. FOR INSULATION VALUES. 5'-Iu&' 10'-115" 2'-915" 21-6" 3'-515" 5'-0" 5'-515" OPT. 3a (I.0 CREDITS). HIGH FICIENCY HVAC EQUIPMENT. USE GAS -' / / / / / / / / EF LANDED GENTRY 3. FRAME MAIN FLOOR INTERIOR WALLS WI 104 5/8" 2x4 STUDS • lb° O,G, WI FIRED FURNACE W/ MIN, AFUE OF 54%. USE CHAMPION GAS FURNACE I2'-O" 281-O" V2° GYPSUM WALLBOARD BOTH 5IDES TYPICAL. (OR EQ. -VERIFY W/ BLDR.)WI 95.5% AFUE. PPP , 6 POST, "r u / u / HOMES AND CONIMUNITIES OPT. 5a (,5 CREDITS): EFFICIENT WATER HEATING. ALL SHOWER HEADS 4 ----NY 2a'4 �/ 11'-6!<i 2a/4 4. FRAME UPPER FLOOR EXTERIOR WALLS W/ %2 5/8" 2x6 STUDS a 16° O.C. KITCHEN SINK FAUCETS SHALL BE RATED AT 1,15 GPM OR LESS. ALL OTHER 2 T ICAL ` �{�" TYPICAL. LAVATORY FAUCETS SHALL BE RATED • 1.0 GPM OR LESS. - \\,1 I REVISIONS BY: OPT, Sc (1,5 CREDITS): EFFICIENT WATER HEATING. WATER HEATING SYSTEM et O 5. FRAME UPPER FLOOR INTERIOR WALLS W/ 52 5/8° 2x4 STUDS • 16° 0,C. WI SHALL INCLUDE GAS WATER HEATER W/ A MIN. EF OF 0.51. USE HAVEN \ _ !_ _ - --_ 34 1/2° GYPSUM WALLBOARD BOTH BIDES TYPICAL. NPE-18OA (OR EQ. - VERIFY W/BLDR.). UNIFORM ENERGY FACTOR OF .56, 6X10 Fj 2 - 21 - IS JR RECOVERY EFFICIENCY OF 99%. I // ' 1 6. FRAME GARAGE WALLS W/ 2x6 STUDS • 16' O,C. (VERIFY HEIGHT OF I 1 WALL ON-SITE PER AS-BUILT FOUNDATION) 30. WHERE TOP OF SILL IN AN OPERABLE WINDOW OPENING 15 LOCATED LESS THAN 24° ABOVE THE FINISHED FLOOR AND GREATER THAN 12" ABOVE THE I PATIO I 1, PLUMBING WALLS TO BE FRAMED WI 2x6 STUDS a 16° O.C. SEE PLANS FINISHED GRADE OR SURFACE BELOW, THE OPERABLE WINDOW MUST HAVE (� I 12'-0" X es-O" FOR LOCATIONS (VERIFY JOIST PLACEMENT ABOVE AND BELOW FOR A WINDOW OPNG. CONTROL DEVICE THAT DOES NOT ALLOW A 4° SPHERE 4 I, a.s(®pdpr-..cay CLEARANCE) TO PASS THROUGH AT IT'S LARGEST OPENED POSITION (SEE IRC R312.2) 10r I I I 8, ANGLED WALLS TO BE 45 DEGREES TYPICAL UNLESS NOTED OTHERWISE I 60610 SGD (TEMP.) I W/ OPT. 6010 I 5050 X0 9, DIMENSIONAL LUMBER TO BE HEM-FIR 42 TYPICAL UNLESS NOTED I I OTHERWISE M. TRANSOM ASV. 3050 SN 3050 SHE- _ (SEE NOTE '16) \ \ 10. UNLESS NOTED OTHERWISE USE 4x6 HF•2 HEADER IN 2x6 EXTERIOR WALLS - 4x8 IHF•2 a Cl 4x HP'2 W CI .S4 4x6 HF'2 4x10 1-IF'2 o CI ABOVE DOORS AND WINDOWS W/ R-IO (MN.) INSULATION. USE 4x6 HFt2 al 4x6 HF"2 ® C2, C3 IL �� 4x6 KF'2 o C2, C3 © n 4x6 HF►2 s C2, G3 HEADER IN 2x4 EXTERIOR WALLS (IF APPLICABLE) ABOVE DOORS AND : x Q (Y I -\ WINDOWS U.N.O. BEAMS AND HORS. TO HAVE I 1/2° MINIMUM BEARING 111 '•-AIL U LL "DI 1 ' TYPICAL U.N.O. (BEAMS SHOWN ARE MINIMUM REQUIRED OR BETTER Q ZI°I \ .g ct I GAS FIREPLACE SIZE AND GRADE MAY BE INCREASED PER BUILDER'S DISCRETION) - X 0 0 'Q -fI I i' U IT N = I : I W/ FLUSH HEARTH / II, VERIFY PLACEMENT OF 4x6 POST IN STUD WALL BELOW ENDS OF `r Q, f,t V V u_ -4 I 1 _ MANTEL 48 ABOVE GIRDER TRUSS ABOVE W/ ROOF FRAMING PLAN ON SHEET A4.I IL 3 S NOOK " Z STUDY/GUEST 8O 1.& .9 W II'-0" x 10'-9" 9 2I'I - IO"-O" x 13'-0" - 12. PROVIDE 2x6 BACKING IN ALL BATHROOM WALLS FOR TOWEL BARS, . �< V l"1 f_I I I LIVING aii TOILET PAPER DISPENSERS,MEDICINE CABINETS, ETC. BETWEEN STUDS. In `T M t COORDINATE W/ BUILDER/OWNER FOR LOCATIONS T 1 XJLI i i 16'-4° x IS'-3" n Q n " n 13. INSTALL I/21 HIGH-DENSITY GYPSUM WALLBOARD AT GARAGE/HOUSE _ 9'-10 rn I , I 19'$44 / 3'-4 / T'-ilk WALL AND GARAGE BEARING WALLS,t 5/8'' TYPE-X GWB • GARAGE 34 I/2" HIGH 2x4 ,Q l01 I CEILING TYP. WHERE LIVING SPACE ABV. GARAGE OCCURS, ATTACH 49I I 1 ° GYP. BD. • CLG/ W/ SCREWS • 6° O,C. IN FIELD 4 ON EDGES TYP. ` STUD WALL BELOW .. 4 t 60 BY-PASS 1 I r - = = = ? vee :C = \ 14, INSTALL 20-MINUTE RATED DOOR ASSEMBLY W/ SELF-CLOSING HARDWARE -il I 1 I I I 1 4x10 HF62 (2*10 MIN.) 9,� I OPT. CLOSET , ti) I I I 1,1 HANG JOISTS - ~ II- SR. 4 ROD 15. REQUIRED STAIR RAILINGS TO COMPLY WITH IRC SECTION 312, DECK RAILINGS 1 KITCHEN 11 III n 4x4 POS , TO COMPLY IF DECK IS 30° OR MORE ABOVE FINISH GRADE (VERIFY ON-SITE). l-= '=-` _�- -- ..�-_,. `y I 9'-I" x 14'-6" c 1 I 141 H }, \ \ `� I I I 1 I SIMPSON HU410 5'-01 " 21-8" t 16. EGRESS WINDOW DIMENSIONS, CLEAR OPENING AND SILL HEIGHT TO -_ I }• �I I III , - BEAM TO BEAM 4 Q f`^O/�° W il COMPLY W/ IRC SECTION 310.1 (VERIFY W/ WINDOW SUPPLIER AND/OR •a I �. • J I I I°I 8'-2" 3'-01's" 41-I" 1, > IX c MANUFACTURER) -! 1 I / / 4 - 'f - D O Q W III 1I1 O HALF WALL W/ HDWD, GAP )- m 0 lil �, It COMPLIANCE DATA FOR THE 2015 WASHINGTON STATE ENERGY CODE t 'V 3 '3 1 4x10 HF•2 (2XI0 MIN.) �• BATH l^��1I m LL IRC CHAPTER II 15 AS FOLLOWS: U I Q Q .I I I (FLUSH W/ JOISTS) '� ' • ` ,1 I \ a1 SLAB: R-10 RIGID • PERIMETER t UNDER ENTIRE SLAB - 1 0 (t f °:: - �Ju X Qt (IF APPLICABLE) , 11 1 E 14 I I SU1P50N °,•_ "t FLOOR: R-38 IO-0 ' 1 JI I 1 - _ ri i_ ;\ (2) 31M PwON ACE4 OTHER 4. '` si WALLS: R-21 (R-IO MIN. • HEADERS, TYP.) I 2'-9a4" :-0alif li W I�V�LS1\18 ( EA, 310E) 510E OF 4x4OST 6� 4��INT. 155MT, WALLS: R-21 (IF APPLICABLE) O 1 I I 4 619 1 (\ UP 16 EC. -ISERS ��� VFLAT CEILING: R-49 (R-38 IF INSUL, DEPTH IS MAINTAINED TO if I IS"x24" CRAWL PACE 1 't 'V I= (eEE NOT: '15) OUTSIDE FACE OF EXT. WALL) q I' y ,4n VAULTED CEILING: R-38I \I \ \ - I ACCESS OPEN NG '4c DOORS: l!°,200 MAX. (ONE DOOR UP TO 24 S.F. EXEMPT) 9 I .>` - �' _ _ - \ \ \ 4 WINDOWS: U•,280 MAX. I I r I _ OFT �RGH 15'-315" , 5'-815" _ Vr GLAZING: 406.5 S.F. • 13.1% OF FLOOR AREA I I - _ _ - _ _ - , N x'y' -X / '_ t SKYLIGHTS: U•,500 MAX. I I '4 I iL - " , FURNACE TYPE: NATURAL GAS FORCED AIR (VERIFY W/ BUILDER) Z 1 I U) �\ _ • _ .: Ny El J SEE NOTE '13 PLATFORM IS REFER TO 2015 WSEC CHAPTER 4 4 IRC CHAPTER II FOR VERIFICATION OF N Q I I „ - PANTRY 11 \e in (r.: = Z ABV, CONC. SLAB (✓�, VTHESE VALUES -I I I3-0 LL OPT. BUILT-IN5 t4 Co (SEE NOTE '21) 3 D u. OPT, X - OPT. _ IL •118. MINIMUM REQUIREMENT FOR ATTIC VENTILATION IS AS FOLLOWS D Z QI I PULL DN. z \ I . SHELVES `4- V BOLLARD `3 \ (CALCULATED • V300th OF ATTIC AREA): IS R4 - 1- \ '� COASTAL I ' Ill µ1 I I STAIR -`� T'-�" �, d'-ID15" 6'-6�i" rS''''"-...„.._. Q MIN. REQ'D: 930,42 SQ. IN. 04 W ft z I I ATTIC ACCESS / SEE NOTE •14 ACTUAL PROVIDED: 1,105.60 SQ. IN. rQ µ. 4)1 I r ' I - tIt VENTED BLKG.: 301.60 SQ. IN. (32 " 5.425 SQ. IN, EACH) W V• `'I I I\\ //I IL -Y' RIDGE VENT: 804.00 SQ. IN. (61 L/F a 12 SQ. IN. PLF) ea J I I I I I a C COASTAL 2 µ• I I I „ I O n MIN. REQ'D: 930.42 SQ. IN. 6X6 I I I / I :: n tl. \ ACTUAL PROVIDED: 1301,94 SQ. IN. I I I) \I Q VENTED SLKG,: 144.585Q. IN. (16 • 9.425 SQ. IN. EACH) POST I ,. - _ 4,1 - tL RIDGE VENT: 288.00 SQ, IN. (19 L/F • 12 sQ, IN. PLF) _ SIMPSON OFFSET �', `? ''t 5 I/8x21 GLB 24F-V4 DF/DF - p ROOF JACK: 269.36 SQ. IN. (2 a 38.48 SQ. IN. EA.) - - P!. ' '_ FLEX ROOM 0 N 0 - --- - - ---- -- -- - - -- --- -- _ N. ' NT COASTAL 3 SIMPSON GLTS (OR EQ.) _ v p 1p N MIN. REQ'D: 930.42 SQ. IN. ECCQ66 I I 3 CAR GARAGE m el 11'-8" x 14'-0" tl- 0U' N n ACTUAL PROVIDED: 1,040.40 SQ. IN. Z �� " 2 CAR GARAGE VENTED BLKG,: 452,40 SQ, IN, (48 • 9,475 SQ, IN, EACH) (OR EQ.) ¢4 IA J I I F IOb x 21'-6 1 `- 9 ENTRY 20'-I" x 23'-6" `� CP RIDGE VENT: 588 SQ. IN. (49 L/F • 12 SQ. IN. PLF) d d -I I I \ \ / ' I O \ OPTIONAL PATIO ROOF ADD: •I I I • / I IL tO MIN, REQ'D.: 46.08 SQ, IN Z I I I \ / / 1 I 0 - r r i ACTUAL PROVIDED: 164.55 SQ. IN. E FI I hT I I - VENTED BLKG.: 56.55 SQ. IN. (6 • 9.425 SQ. IN. EA) d Q IWtTI 1 I x i I 11 - I - - IQ VENT-A-FLASH: 108.00 SQ. IN. (12 L/F • 9 SQ. IN. EA.) IY =1 I I -OPTIONAL 3-CAR GARAGE: � Q '1 1 \ 71 I NMIN, REQt'.: 101.80 SQ. IN. UI & I I I / I 4x6 HF'2 4X6 I-IF'2 I 1ACTUAL PROVIDED: CI t C3: 214,25 SQ, IN.: C2: 256,04 SO. IN, LL I I \-\ I��u� L I I - . VENTED BLKG,: Cl t C3: 54.25 SQ, IN. (10 • 9.425 SQ, IN, EA.) I I }x10 HF'2 a GI t C'3� (2)3050 5H 1 , . I C2: 119.08 SQ. IN. (19 (I% L/F • 12 SQ. IN. EA.) I I I , dx8 HF'2 S C2 N _ I ^ , I RIDGE: CI 4 G3: 120.00 SQ. IN, (10 • 12 SQ, IN, EA.) ROOF JACK: C2: 16.56 SQ. IN. (2 • 38.48 SQ. IN. EA.) Jil18-0" x 7'-0" OVERHEAD I \ - \ 0 m PORCH _ h'1/8x21 GLB 24F-Y4 DF/DF a CI i n 2 GARAGE DOOR 9 I 4" CONC. SLAB lr 5 I/0x16 1/2 GLB 24F-V4 DF/DF m G2 t G3 ^ II -jj, O1R 19. SEE ELECTRICAL PLAN ON SHEET ELI FOR LOCATION I SIZE OF \ \ \ \ I I \ \ \ \ yy. `� EXHAUST FANS. LOCATIONS AND SIZES REQUIRED TO COMPLY W/ THE I I 16 -1'-O" X '-0" OVERHEAD GARAGE DOOR =� _ _ STATE OF WASHINGTON VENTILATION 4 AIR QUALITY CODE t IRC MI5O1.4 „ „ „ (3I • I al O . 6 5 8'-0 I'-515 = 6x10 HF 2 (COASTAL 3: CLEAR-SPAN ARE AS FOLLOWS: / _/ in 0~ I.- �I N ih KITCHEN: 100 CFM RANGE HOOP 1O,-0„ N _ E1LS,XI$,1 S=LB_24F_V_4 DE/QFZ 6K10 HF•2 , _ LAUNDRY: 50 CFM 80 CFM RECOMMENDED) / / 4-.- - --.. -�� -.-- .-. _F - Nt \ BATHROOMS: SO CFM (80 CFM RECOMMENDED) Y �'t NOTE: ALL FANS ON 20-MINUTE TIMER TYPICAL. ELECTRICIAN TO -.T. 6X6 POST WRAPPED PER `� VERIFY INSTALLATION OF GFCI OUTLETS IN ALL WET AREAS. VERIFY BUILDER. 3 TYP. (COASTAL 3: " n is TYPES 4 LOCATIONS OF ALL ELECTRICAL FIXTURES W/ OWNER AND/ORADD 16" x 16" MASTIC-APPLIED 12412-2 6'-10 t2%" BUILDER STONE VENEER COLUMN BELOW 19'-5J" / 20'-61h" / 20. INSULATE ALL ACCESS DOORS/HATCHES TO CRAWLSPACESS/ATTICS 4 OMIT CENTER POST)TO 4'-4 " / 3'-"13(>" / d'-2" / 3'-6 " / 3'-314" / ROSARIO CE THE EQUIVALENT WWHICH RATINGH OF THE INSULATED FLOOR,WALL OR 3 CAR GARAGE OPTION CEILING THROUGH THEY PENETRATE •• 12'-2" 6'-10" 2'-6" IS'-0'' 2-6" 21. MOUNT NWT ON PLATFORM IS ABOVE GARAGE SLAB PER IRC SECTION MI301.3, 1/4" : 1i / / / �/ / STRAP RUT TO WALL PER IRC SECTION M1301.2. PROVIDE OVERFLOW PAN t SCALE: " I-O ADD 225 SQ. FT. 19'-0" / 21'-0" / PIPING PER IRC CHAPTER 28. INSTALL T I P VALVE 4 PIPE TO EXTERIOR TERMINATION 40'-O' 22. WHOLE-HOUSE VENTILATION PER IRC MI5O1.3. UNCLE HOUSE FAN LOCATED IN MAIN FLOOR ���� LAUNDRY ROOM (VERIFY WI BUILDER) Q 23. DISAPPEARING STAIRS OR ATTIC ACCESS PANEL COVERED W/ 5/8° / N// A IN FLOOR 1 LAN GLUE, AND PROVIDED W/ WEATHER STRIPPING GASKET � _24. FIREPLACE TO BE SUPPLIED WITH OUTSIDE COMBUSTION AIR DUCT AT -'-_ _ - -- = SCALE: i/4" = ILO" 1,311 SQ, FT. LEAST 6 SQ. IN. AND PROVIDE READILY OPERABLE DAMPER. INSTALL JOB NO.: ROSARIO GAS FIREPLACE W/ CLEARANCES AND COMBUSTION AIR PER MANUFACTURERS RECOMMENDATIONS AND PER CODE DESIGNED: LG 25. 12 - 16° FIBERGLASS FACED GWB BACKER AT TUB/SHOWER SURROUND e TOTAL: 3,115 S.F. DRAWN: TP GARAGE: 493 S.F. 26. PROVIDE MINIMUM OF 22° x 30° ATTIC ACCESS W/ MINIMUM OF 30° HEAD FRONT PORCH: 134 S.F. DATE: 12/22/2017 CLEARANCE. USE PLYWOOD DAMS TO CONTROL CEILING INSULATION REQUIRED BACK PATIO: 96 S.F. SHEET /� 21. PROVIDE PARTICLE BOARD UNDERLAYMENT AT VINYL. COORDINATE It-3e THICKNESS W/ OTHER FLOOR FINISHES TO PROVIDE SMOOTH AND I LEVEL TRANSITIONS 28. USE PRIMER/SEALER ON GWB BEFORE AND AFTER TEXTURING aND IS ID IMI all S LINE OF OPT. ROOF BELOW r 1 I I LANDED GENTRY / 40-0 1 / HOMES AND COMMUNITIES / 12.-519" I/ 12'-319" / 21-8" �, 12'-1" / / 6'-519" 6'-0„ / 6'-319" 6'-0" / / 6-0�' 6-614 / REVISIONS BY: 1 1 1 2 - 21 - 18 JR 5050 XO I 5050 XO 5050 XO (SEE NOTE '16, (SEE NOTE '16, (SEE NOTE '16, 3 - 9 - 18 JR SHT, A3,U I SINT. A3.1) BHT. A3.1) \ \ inximmami. a®al=I _ amael_I \---\ 4x6 HF'2 4x8 1-1F+2 1 4x8 HF'2 111 I x 1 1 c� 01 � `r II-01 ft1 N IIQ M I OJ m 1 BEDROOM •2 BEDROOM •3 d 1 U 1 n = • 'T \\\\ 3r ./ z P a4 BEDROOM 4 N @ p p I2'-0 x II-5 12'-0 x 12'-2 I E"�� `� 12'-1 x 12-2 ao cci ~vi7. 0 . J •1 r' �l / gi_1a" 31_411 115" 1 " 8'_8n , " f ' 114„ i n111-11`" n \ 11'-119" �F ` ! 4'-819" 41-5" 11 4-615 4-119 ! l-1019 3'-9 y ,, 12" BY-PASS rF 12_�SYS BATH'. w N x/ sa F • ROD ' BATH m 41h0 N(il0 =TT 2 e _ _ R 4 MAS ER LL _ �. .o 2 5 „ o b 1 3-159" 3'-119" 8' B" 3'-119" N/ \ �+ W `► IT d).9 �'89''m " 4' 86'-2" nit" 4' 1" BAH U ll 4 Z = 1 42"tIGH WALL W/ HDWD. CAP r`, 2-'8 W 00 m 42" HIGH?WALL W/ HOW. CAP �� , /0 Q �' G�i 22"x30" , O / o --�\ \ I fl -- a.-----"Tha=4 ( -) II O tk _ > b� MECH, ATTIC ?� _ U '91 O - DN. 16 EO. RISERS O\ `Y in ACCESS "a " 1:. =•. RI: -S _ z Z III I \ / , ENOTE 6' 2 .n OE 15 4, 3 . x T =� Mt m w 'P I \�/ ' 20 '26) ' M m 2 \ . in :9 1-- In al N wvo % m GAS I �„ 1 Q \ .� _ , \ ,c z -1 LL Q m M o~ N FURN. - - ' „ 42" HIGH WALL I _ > = I " Q �U p =_ I O " �+ Q d2 NIGH WAS I , � in _ to - W/ HDWD. CAP 2_8 ru O T '4 I- I W/ HDWD. CAP 2_ffi 1 U x O Q in '. 0 Ili - w 44- aD `p O 1-v 3 in . . iHELF LROD aI O I W r I / I`= n O L t 1 (..)1 1 UI= - I.iamow,_ - bi RXII - r• ->t // i FRENCH D•• 60 =Y-PASS - - -m /F = I al ul�i NnC--1 - 53-11 124 T-10 a` I rail - I T I Q �,,, I , u , u 1 l9 1 s ') , +n 1a 11 I/2-119 / 4-II IPi zl m 4 LAUNDRY O , —0 10 . a I LAUNDRY 3' gi " 3'-319" I 1'-ol " o I� WI ii (Dp sID 3 X I • I' I ct la U1 • -I mil lr �I CV Io� IU hzE + I Li- X IU V.T.O.� dl " O r rl-1 't—4,4 0 - I� Cl ^1 I I13 x' W - `t ZI VAULTED o PIm I O I� Z� x—O Im 9 F1 FAMILY SHELF t ROD J JI L'—O IZ _SHELF t ROB z J' OI Q 1X a1 IB"-a" x 15'-II" ' `� I =IIO� II- I tom)- =1IT, JI £ O V lO "l x-p1 0- O O - u I-I = 74, o I I II i0 O e I 1 �I � IW 41 �� I > a' OI —O �O I a - V LILTED gv—X Iz pl I UI Q Iz u WALK-IN ' HASTE BEDROOM =II IJ a �,1 . o ' IJ 4x12 H' r (SEE I L 13'-4j x 19'-11" �� I LLI W •LK-IN VAULTED LL X 1 SHE A3,4) I 4x6 HF'2 4xb HF'2 = CLOSET I 1 —n I •' LOSET T MASTER BEDROOM o >. \ \ -, I m III•�lt1 N la I _ I � N I 10 13'-4" )4 1l'4" •xx n0 - I 60610 FRENCH 3060 SH 3060 5H I� ip I in I I 1� I + 1 DOOR (TEMP.) (TEMP) 1, I ' 1. 1 m I I I /II iI I Q �� I= i� I I� IQ ,t, 14) 4x6 HF'2 I 4 6 HF'2 4x61HF'2 4x6 HF'2 4x6 HF'2 IN 4x6 HF'2 4x61HF'2 4x�e HF'2 \ I ICI 91��111I�I�I�I---- - l \ a \ ICI I�II•I�II•I�I COVERED �I 2020 PIC, (3)3060 SH (TEMP.) - 2020 PIC. (3)3060 SH (TEMP.) i BALCONY =1 (1-0 HDR. Het) (SEE NOTE '16 t '30, SHT. A3.1) m 4 (1'-0" HDR. HGTJ (SEE NOTE +16 t +30, SHT. A3.4) 19'-O" x 1-o" mx I C'1 1 m i r P.T. 6x6 POST &4" I9'-0" 3" / 3 "'-8 / 3'-219" / 3'-6" / 3' 419" / 3'-49" /1 3'-1O�i` / WRAPPED „ 1, \ PER BUILDER. IS'-519" / " 20' 619' / / 6-1019 / 14-119 2 TYPICAL 6'-33s 6-019 3 419 3-31~ / 3-8 / 3-215 / 3-6 / 3-419 / 3'-41g / 3'-1019 / / 211-0" / N\ / 6'-IOlt" , 14'-I19" / I9-o / 21'-0 / 4O-0 MASTER BEDROOM OPTION SCALE: I/4" a I'-O" ROSARIO UPPER FLOOR PLAN SCALE: 1/4" = 1'-0" 1,804 SQ. FT. UPPER FLOOR PLAN COASTAL 2 & 3 JOB NO.: ROSARIO DESIGNED: LG DRAWN: Tp DATE: 12/22/2017 SHEET A-3 . 2 {� ese �c CONCRETE / �� CURB&GUTTERefe '��� WM �� . '' ABBREVIATED LEGAL DESCRIPTION: OS \ N Gt�j (Lot 11) EXIST. Sfr4ITARY Erosion 3ontrol Notes for Residential Construction-City ofNMI �� `� Anacortes �� NON �NpE� SEW7FfCLINE LOT 12, 48 NORTH PLAT & PUD, SECTION 22, TOWNSHIP 35 �� �j (tOTEG��PSGµBPR�p ( WM / LOT 11 NORTH, RANGE 1 EAST, W.M., CITY OF ANACORTES, SKAGIT p M �VSE QJ / L, �ee A. Erosion Control Best Management Practices shall be in place per the COUNTY, STATE OF WASHINGTON. 0- NSTR.p,s\NF �T N { x 219.7 / accepted site plan prior to any construction start.T00 LANDED G E N T xY G220,GP OP PPe PX. EXIST / B. The erosion control shall be inspected once a day and modified to Za 00 ° / GRADE meet the wounding conditions as needed- HOMES AND COMMUNITIES / C. The storm drain system shall be cleaned daily{Section 7-07.3}.All �31 drainage systems shall be cleaned to the acceptance of the City of GENERAL N 0 TES 2 / \ `t / s Anacortes prior to acceptance of the project. CONCRETE L ', \\ \ / E - G 10' PUBLIC D. Stabilized construction entrances and roads shall be installed at the SIDEWALK \ TILITY EASEMENTI beginning of construction and maintained during the duration of the OWNER: j // . XIST. SS project. Additional measures may be required such as wash pads to LANDED GENTRY �" •NNECTION 217. i + (LE 12) ensure thet all paved areas are kept clean. No mud is allowed to 504 E. FAIRHAVEN x \' enter onto City streets. qQI5W;Q2,r + BMP C15:STABILIZED E. Any soils exposed that will notbe diurbed fortwo(2)days during the:xi i SS CONSTRUCTION I OT "vt,& ENTRANCE I wet season or seven (7)days in the dry season shall be immediately �' IGkT ur�JAY'_INE (SIZE TO FIT) stabilized with the approved ESC methods(seeding, mulching, plasticBUIO WG: + 19.g0 covering, etc.} LOWER LEVEL AREA— 1,346 SF + F. Two (2)weeks prior to the beginning of the wet season(October 1), UPPER LEVEL AREA— 896 SF •♦♦♦♦♦♦♦♦ ♦ + 0 OI all disturbed areas shall be reviewed to identify which ones can be TOTAL LIVING AREA 2,242 SF EXISTING ♦•` 1k -! ` seeded in preparation for the winter rains. Disturbed areas shall be GARAGE — 433 SF / •4 seeded within one (1)week of the beginning of the wet season.A I STORMDRAIN 'Oe , ' 'if / + G' I sketch map of those areas to be seeded and those areas to remain SITE: •� ` —1 uncovered shall be submitted to the Project Manager. The Project LINE(TYPICAL) -1-, ••moo ; o_ Manager can require seeding in additional areas in order to protect TYPICAL — _ — ` •••� \`, + surface waters, adjacent properties or drainage facilities. ZONING: + • ���i` PROPOSED 4" DIA. G. Penalkies for an Erosion Control violation are subject to a$300 to R2 — RESIDENTIAL LOW DINSITY •NNISt It •• \` SOS?QC + SANITARY SEWER $1000 fine under Chapter 17.66 - Penalties for Violation. Each day is + • \ 0�2� considered a different violation. SETBACKS: EXIST `f �••� ` PG9lps� +� WITH CITY ALL AGUIDL/NES CKS IN COMPLIANCE GRADE •• ` �0�� + SIDEYARDS MIN 5, 15' COMBINED INLET PROTECTION �+ •••• 94p�rT�G�` REAR YARD MIN 30' C220, BLOCK& �+ • y ! Q�'G� +` i D FRONT YARD MIN 10; 20' GARAGE GRAVEL FILTER , , > ` •• d'O i \`% i D m v o m TYPE + •• .,� A . O� + 'a • m m • Pp . V I n O , +�•��li �� • +� BMP ER SILT Li i < v • y �_lC A + FENCING TO PROTECT BMP C233: SILT FENCEI 'i �x HEIGHT.` + •:2QP>�C e, `k(�\ ^p°l� \\ ` g DOWNSTREAM YtKIMtIERSILT m O O MAX. ALLOWED: 35 VV / PROPERTIES FENCING TO PROTECT D r PROPOSED:UNDER + •<<• `cc f PC�F' ��'I \` ` Ic� PARKING: •• �S�p� �i 'DRIVEWAY + 221,3 ' m PROPERTIESM m n _ ° _ z z '' 1 2 IN GARAGE, 2 IN DRIVEWAY + ••• P) \ EXIST CHECK DAM PER BMPII— �� O -o t • V \ + GRADE - C207:CHECK DAMS, �� 1 + ••• \\ A+ ir AS NEEDED. z O ♦ PROPOSED 4"SCH \• • Z 40 PVC DRAIN LINE ;• \\ \ ` 17 62 46,89' c. L 0 T COVERAGE D -° BUILDING AREA: + \ 30.00' lli 2 1;.1 2,163 S.F. •i• \ ` `+...�x.x.�x�.�x.��x„�.x��x��x.��x�� =EXIST•• ` 221.00 x'�x�x`x--x�x�. �D \ x.�..x—.max x�x�x�. L o LOT AREA: TG x 6'� `••• \ ` ( N ' 4.00' �_ x. �x��x�x x_..x .�x.�x x..�.x��x R=II t 8,$49 S.F. cP. • \ r•■r■■■ id 47p0, PROPOSED 4"SCH I Z •• ■u■•,,r, ♦ w 40 PVC DRAIN LINE a PERCENT COVERAGE \ • \ Q r __ LOT LINE • 6 49 4 4% + ••••• • ���� ■r■■■■■• ■■■r■■'r ■■v■■■-gym �� _ , os nnnnnnnnnn G& tVO� • • rb MAXIMUM ALLOWED: 37.5% • LOT 13 • `.. �"'� ♦ eat r� ,,,�,� Q 05O\QVP PLACECQNSTRUCTION IMPERVIOUS COVERAGE I 0� BUILDING: 2,029 S,F, EAVE ilia S EXISTING AROUND AT DRIP f`— OVERHANG �•• ♦ u STEPS/WALKWAY: 19 S.F. \ •. I m L LINE PLUG,i. • ::: ♦ I V) PORCH: 134 S,F, 1 •. • -' I cov RED - 30 REAR • PA770: 96 S.F. •• % POVERED YARD BUILDING DRIVEWAY 1.871 SF BMP C233: SILT FENCE �� I x UNCI ER' D TOTAL: 4,149 S.F. PEHIME1EKSILT + • FENCING TO PROTECT `•• • I PATIO SETBACK • DOWNSTREAM ;• LOT AREA: PROPERTIES •• • ¢ ; PROPOSED HOUSE 1 1— BMP C233 SILT FENCE 8,849 S.F. PLACE SILT F_NCING ON `•• • O I DOWN STREAM SIDE OF •• PERCENT COVERAGE. • LOT 12 4,149 8,849 = 46.9% + ••• j STOCK PILE / -F •.-:, TG 70 MAXIMUM ALLOWED: 48.0% ,,_ , �• 223.40 FF • x • - 1 - &AN e �x�x—x i Yq/f, e /x. 4.�k x I 10 ( O s SOIL STOCKPILE LOCATON • CS x EAVE �' , 221.3 d BMP C123: PLASTIC COVERING • r EXIST x OVERHANG LOT LINE&PLAT GRADE COVER WITH PLASTIC DURING STORM iNe f— I EVENTS AND WHEN NOT BEING BOUNDARY fWORKED FOR MORE THAN TWO DAYS 9 0' WA �ERLINE I rn 0 I 222.40 GFF II 4 x ti Z EASE�NIENT x eti 222.so FF I g - .�» ,., .,. to ,,. ., I e fl RO POS ED `TO REDUCE FENCE BMP C103: IGH VISIBILITY • i TO REDUCE RISK OF PUBLIC agµQ TS .3 rhu�4 1� te¢� ENTRY INTO CONSTRUCTION cs GARAGE SITE • Pam +0 1au(tP�� �,� GRAPHIC SCALE PLACE CONSTRUCTION ° 6 0 3 6 12 I I 00, PRbPOSED 4"SCH FENCING AROUND • o � f ��� to I ° 40 PVC DRAIN LINE I EXISTING TREE AT DRIP q�Wtq S ,y � �� hi x I I ,�.•„ LINE PLUS 6'. J ( IN FEET /� I Iweissesmea , P� bOM` "' Horiz. Scoae: > Inch = 6 Feet I I .. ��P� 24.sa' I EAVE 4 I .••'♦♦♦♦♦♦ D o� • 48 NORTH � , P� I OVERHANG ♦♦♦r♦♦ ,..0P, 6 ) , i kcc 7 x ROSARIO � �c.ob / "' s�nnnnnn .♦♦`'♦♦ G��s��P`jO� 1 o 3-CAR GARAGE RIGHT I I 22.46' S —— J LOT LINE ' --- ' \�G��,o, r4.). clillT _F.. . LOT 12 13367 ) SITE PLAN �r� C bra E5lR ' � 47.00' 2254' ; I 1 k G0\.\s cc F CHECK DAM PER BMP PROPOSED 4° DIA. C207: CHECK DAMS, SANITARY SEWER 15 CIRCLE G1�Os��P AS NEEDED. m •• I 4 e � \ � a�� I ANACORTES, LATITUDE // , _ � S, WA — CHECK DAM PER BMP EXIST 1 1 I • C207: CHECK DAMS, GRADE ry ; I I AS NEEDED. • • • • • • ` •• • • • • • W v t �� „�°' JOB NO: PLAT OF "48 NORTH" �' LOT LINE F ZI. a _ DESIGNED: LG / 222.2 oc Z O U \� 111398 . °,° EXIST L I W Q BMP C103: HIGH VISIBILITY PLASTIC FENCE \ �'` DRAWN: GRADE Q W m m TO REDUCE RISK OF PUBLIC ENTRY INTO k -) Li CONSTRUCTION SITE SHEETEE: 1 O1$ `'Z Q ° ,r °° ° x _ ,.e,ve, �,,, ��, - iO i LANDED GENTRY HOMES AND COMMUNITIES At a , z , Aw ry @ ., ., Y r s '., , ,. 4 a c S. .`f ^iyl andY t ,,t ^•R z rcrx ;x,< 5� "."..,.,'vs . YKc d AM lt ysf s 3 ra ak " "` S rc, r .'". ",,y :r vR$. {• y cx+°'h a^ni�,�; r"�is �� ya,� ;a4`� �w�k *'tea z �� a . ,i €x:?k- z t E rc c- .rs. • ... J. s. .. .x i.. 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SITE PLAN � -.... —. .: ,.. .<.... . .. r . , .-. ,,. . et ,. .. �T LOT 12 (P 133670) 5,w a ; a. r M e u z kE ry c • .,r u;�,� n �•e�a�cs^.�e ����� roams% 1TV ` ��, � ; , Is�apdata ®2p"[? C�t►ogle 10Q0 ft� 4; 1510 LATITUDE CIRCLE VICINITY MAP ANACORTES, WA *., e ,r LOT 12 (P133670) 1510 LATITUDE CIRCLE PLAT of °48 NORTH„ w � JOB N0: h ANACORTES, WA KQ 0 2 2018 DESIGNED: LG DRAWN: F DATE: 02/19/201 8 SHEET 2 OI f +-:'.• a.. ueea� -;-_a.. ,rc cy- z�. ;,. .w . . .. a fl. r q;a2k sY •aifl... .cn,.: m rc :4Y°w' 't' ..� ':E �, ,1 a=i+y Y 3`j^`.n}.. 'I'y.r,-. _�...�w< .a� ,_. MM��*�