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HomeMy WebLinkAboutStorm Water 1-5 BLD-2018-0318 3810 Leeward Lane SMALL PARCEL STORM WATER PLAN LANDSCAPE LEGEND J. SYKORA, CPBD �� DRAFTED BY: �,,. 0 5P5P # 1 CONSTRUCTION ACCESS ROUTE A ��� 0, i� ' A) A STABILIZED CONSTRUCTION ACCESS TO CONTROL THE LAY •N AREA s TRACKING OF DIRT AND MUD ONTO THE CITY STREETS SHALL BE SCALE i 1-- OT INSTALLED. ACCESS TO BE CONSTRUCTED OF 4"-8" QUARRY 1,, = 20' U.N.O. 4 �/ SPALLS AND BE OF SUFFICIENT LENGTH TO CAPTURE DIRT AND ° ��• ' \ MUD PRIOR TO CONSTRUCTION VEHICLES ENTERING THE PUBLIC w' '= ii / \e. ROADWAY. CONCRETE DRIVE 5-14-18 /\�", ili /� \ �' ®` 5PSP # 2 STABILIZATION OF DENUDED AREAS \ LOT b \ © A) EXPOSED SOIL SHALL BE STABILIZED USING MULCH, PLASTIC e / \ \ COVERING, SOD, SOIL BINDERS, OR HYDROSEEDING IN ORDER TO ELIMINATE OR REDUCE SOIL EROSION DURING THE MULCH - PLANTING BED Cr) 0.0) z / 1g 4 &,,. \ �oY PROCESS OF CONSTRUCTION AND REDUCE THE TRANSPORT OF (9 / ' ,, „,•; ,,,, \ SEDIMENT AND POLLUTANTS BY STORM WATER. (n LLI / "' �� \ \ U 5P5P # 3 PROTECTION OF ADJACENT PROPERTIES �!'!'!'!'!'!'!'! LANDSCAPED .- \ ;, \ A) ANY ADJACENT PROPERTIES TO THE CONSTRUCTION SITE SHALL �•4•�•�•9•! �•4' ROCK SLOPE n 4 i / AREA NOR BE PROTECTED FROM SEDIMENT DEPOSITS THROUGH THE USE OF 0'•••••••••••••' ' / \ \ \ /' AREA SILT FENCING, DRAINAGE BUFFERS, STRAW BALES, STAKED FIBER x ROLLS, OR ANY OTHER APPROPRIATE BMP. DEPLOYED BMP'S SHALL mei E �/ \ LOT \ \ - BE MAINTAINED, REPLACED, OR REPAIRED A5 NECESSARY DURING R ' THE COURSE OF THE CONSTRUCTION PROJECT. o DECIDUOUS TREE oo, i' " / \\ 18,810 SF \ To? of SLOPE al / �35�� \ AREA NORTH OF OG L!NE _ ?,34` : L} SPSP # 4 MAINTENANCE ' \ \ \ / A) MAINTENANCE OF EROSION AND SEDIMENT CONTROL BMP'S a LOT 3 G�, 2 '1 G _ ��(�� SHALL BE PERFORMED BY STRANDBERG CONSTRUCTION AS a a \ ,__ NEEDED TO ENSURE THEY PERFORM OVER THE COURSE OF g \ \ \ / \ THE CONSTRUCTION PROJECT. 1 \ \ 20 236 SF \ \ ' CONIFER TREE \ + \ - +st ici,. ; AREA NORTH OF LI tic =�"' 1� / © 5P5 DURING# 5 OTHER BMP 5 MAINTENANCE AND REPAIR OF EROSION AND W I LOT { «; \ \ yn \\ / 51"b MODIFY OR \ SEDIMENT CONTROL BMP'S IT 15 DEEMED NECESSARY TO MO ' s,a�„vaRrr+G a�� ,ivE bec5�� - `'""� \ IMPLEMENT NEW BMP'S THEN A NEW STRATEGY SHALL BE w \ i ! ,�05 5 F \ D \ .",..-Tr ,„„:„:,„ ,F / ,t '''\ / I DETERMINED AND DEPLOYED AS REQUIRED. PERIODS OF HEAVY RAIN, IL mnx in ..=way /'�+;°m,sTor.„oN \ 30 %o - \ CHANGES TO SOIL STOCKPILES, INSTALLATION OF LANDSCAPING E \ \ i s\' \ "NeCno ii MATERIALS, INSTALLATION OF IMPERVIOUS MATERIALS, OR SIMILAR SHRUBS PLANTINGS\ \ �QP 0 \ V113 ie'-y°� ' ie \ \\ MAX IMPERVIOIUS = 2,203 5F ye v SITUATIONS SHALL BE MONITORED. p , \ o f _ MINI M R N ITY co TA oi \ / AREA NORTH _ '' 200 ...1 Na— w:': _ ��- �pK ' \ s \ 30 G/0 y \ •` ANAGORTES MUNIGODE-16.50.070 Q C MU T EE DE i -, y s a5•y \ \\ ` MAX IMPERVIOIUS = 2,159 5F �' Calculation of the Total Tree Units Required. The total number of tree units required O 12.9 % SLl3PE' / \ \ — � �� \m ,�^ \ Z mW�� ,� tiJ a\ f to be provided by a regulated project or tree conservation permit approval listed in a / ✓ \ � � rs; \* \ Section 16.50.100 shall be calculated by dividing gross site area, minus any public or I- r c F i \ R2 M�� F>o > 4 A ^a \ private street rights-of-way, by one thousand Table 1 b.50.120(D). The result of the 0 O - n O. AREA NORTH OF200' LINE = \ - ° %\ -�\ ill \ _�\ 4/.<- calculation will be the total number of tree units required for the project approval _ O < o m / .. \ v {, r \4... Vs \ .s!i<7.1A.ItilialltliilattliENK V,,-` \✓ /�� \ \ within the building site. m , Q m \���� i TT•, - LOT SIZE :18,870 SQ.FT. TREES REQUIRED: 19 o� / bst a111 INFORMATION e { 0 ^ / � (� � � MAX IMPERV!OIUS = 1,8?0 5F \ � t ', LOTZ IN RMA _ t— ' ,`tr \ \ �/ \�o to 1 °':::. - sr k . , I \ /\ \ \�� T •S+ a.,:•- w CV ��� \ V" \ w > Ar% �':.rii : It StC) \\\ \ / LOT SIZE : 18,810 SQ.FT. - Z co L.- /—$p— \ V l\ ��et n \ _� ,�, �- \ h8 �, /' `M- SHORELINE AREA NORTH OF 200' LINE: b,81b SQ.FT. Z Q J >S A NORTH OF200' LINE = 4,502SF j \ \ \ ' • tlANso��' \\ \ \ // = 30 IO \ NM \` \\o���'� v� MAX IMPERV. ON SHORELINE AREA (30%) 2,044 SQ.FT. . n 131 % SLOPE / e,,00 \ �` - act Z V / Q /y MAX IMPERVIOUS = 1,954 SF - \ soots!) \ `.Y .- F // i_. \ \ \ \, \ r �b -- GARAGE S /".' \ ACTUAL IMPERV. ON SHORELINE AREA (30%) = 2,044 SQ.FT. lt1 LLI to \ /\90 \ \ / MAX LOT COVERAGE (35%) = 6,604 SQ.FT. v iY 1 w 30 GrG t / \ yLM \ \ \ \ oR =a \ / l 5Q.FT. MAX IMPERVIOIUS = 350 SF ROpA �N \ \ �2 \; " ri FOOTPRINT OF HOUSE / GARAGE / SHOP 3 .. ,. CONNECTION E. w 46 . 114 � �` ri: \ 200' \ \ W ~ J O ` _ \ IMPERVIOUS DRIYEYVAY AREAS : 1 ,308 SQ.FT. O \ \ \ F i O \ \ \ \\ \\ b\ _\._ ♦ ,� H ::ovtiv \\ `" / TOTAL IMPERVIOUS AREA : 5,945 SQ.FT. rY Z \ �8 \� � \ ,:` ; �i a e"� / V a_ iten � v v v -% - o ,° v ` PARCEL # 133158 \ \' \ //// 1 """t� - l� N \ ADDRESS: 3814 LEEWARD LANE \ \ , \t -- `—__ / \ \ i- �, t. °NNE j \ \ \\ /� \\ \\ �/ � ,, ��i �� — ' //� ��\ \ p.cc , ,. � OWNER: TOM AND LANA GARRETT \ / \ \ a 111 DRIVEWAY-a°z sa.F*- . `�\� alb woo \ice ----� -m nr' - , .:r I // o"-,w`rc q� \ titr� � ' 100 \ / Mg --VC.....------------a°T �� \ \ / // SHOP / V i2 §a \ / 102\ \ MNNELOOR��° / o� / '/ \ / I� zwwy aoo \ ...// / / f / \ \O / 104k �` ç - ---- " news A go Yt / .......00.... X izwoo V ell ,i. R11 \/� Mil zo \ \ �. �„` IL zwmwo �rcoe-z \ti4Y � jq"E wx rc / �oi�s 108" 414 � �"�421 16'HEIGHT RESTRICTION FOR SHOP °a`g�= \ \ \ \ \ - 112N'� .... / MEASURED FROM OAKES AVE. O� ��z�= e \ \ \ \ 1-PI \ \ -\ \ . to • I 1"inci°1 \ P1/4\I tii VP \ \ \ OV'LNER APPROVAL \ \ INITIAL: \ i � PAGE: 0 I>1/41144t. _lir AGA , ,, \ .....,-- ..--- e ,, ,.:. I e O BMP C105: STABILIZED CONSTRUCTION ENTRANCE / EXIT 0 BMP T5.13: POST-CONSTRUCTION SOIL QUALITY AND BMP G154: CONCRETE WASHOUT AREA 0 BMP G235: WATTLES PURPOSE PURPOSE PURPOSE DEPTH J. SYKORA, GPBD PREVENT OR REDUCE THE DISCHARGE OF POLLUTANTS TO 5TORMWATER FROM CONCRETE WASTE SY CONDUCTING WATTLE5 ARE TEMPORARY EROSION AND SEDIMENT CONTROL BARRIERS CONSISTING OF 5TRA N,COMPOST,OR OTHER STABILIZED CONSTRUCTION ENTRANCES ARE ESTABLISHED TO REDUCE THE AMOUNT OF SEDIMENT TRANSPORTED ONTO WASHOUT OFF-SITE,OR PERFORMING ON-SITE WASHOUT IN A DESIGNATED AREA TO PREVENT POLLUTANTS FROM MATERIAL THAT 15 WRAPPED IN BIODEGRADABLE TUBULAR PLASTIC OR SIMILAR ENCASING MATERIAL.THEY REDUCE THE PAVED ROADS BY VEHICLES OR EQUIPMENT.THI5 I5 DONE BY CONSTRUCTING A STABILIZED PAD OF QUARRY SPALL5 AT PURPOSE AND DEFINITION m ENTRANCES AND EXITS FOR CONSTRUCTION SITES. NATURALLY OCCURRING(UNDISTURBED)501L AND VEGETATION PROVIDE IMPORTANT 5TORMWATER FUNCTIONS W ry ENTERING SURFACE ATER5 OR GROUND W W WATER. VELOCITY AND CAN SPREAD THE FLO OF RILL AND SHEET RUNOFF,AND CAN CAPTURE AND RETAIN SEDIMENT.WATTLES INCLUDING:WATER INFILTRATION; NUTRIENT,SEDIMENT,AND POLLUTANT ADSORPTION;SEDIMENT AND POLLUTANT ARE TYPICALLY 8 TO 10 INCHES IN DIAMETER AND 25 TO 30 FEET IN LENGTH.WATTLES ARE PLACED IN SHALLOW CONDITIONS OF USE CONSTRUCTION ENTRANCES SHALL BE STABILIZED WHEREVER TRAFFIC WILL BE ENTERING OR LEAVING A CONSTRUCTION BIOFILTRATION;WATER INTERFLOW STORAGE AND TRANSMISSION;AND POLLUTANT DECOMPOSITION.THESE FUNCTIONS m TRENCHES AND STAKED ALONG THE CONTOUR OF DISTURBED OR NEWLY GONSTRUGTED SLOPES.SEE FIGURE II-4.2.14 CONDITIONS OF USE ARE LARGELY LOST WHEN DEVELOPMENT STRIPS AWAY NATIVE 501E AND VEGETATION AND REPLACES IT WITH MINIMAL - --- -- - - - CONCRETE WASHOUT AREA BEST MANAGEMENT PRACTICES ARE IMPLEMENTED ON CONSTRUCTION PROJECTS WHERE: WATTLE5(P.378)FOR TYPICAL CONSTRUCTION DETAILS.W500T STANDARD PLAN 1-30.30-00 AL50 PROVIDES INFORMATION 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 TOPSOIL AND 500.NOT ONLY ARE THESE IMPORTANT STORMWATER FUNCTIONS LOST,BUT SUCH LANDSCAPES 1/4" = 1' U.N.O. v ON WATTLES(HTTP://W W W.WSDOT.WA.GOV/DESIGN/STANDARDS/PLANS.HTM#SEGTIONI) o -CONCRETE 15 USED AS A GONSTRUGTION MATERIAL. THEMSELVES BECOME POLLUTION GENERATING PERVIOUS SURFACES DUE TO INCREASED USE OF PESTICIDES, W W W � -IT 15 NOT POSSIBLE TO DISPOSE OF ALL CONCRETE ASTEATERAND WASHOUT OFF-SITE(READY MIX PLANT,ETC.). ENTRANCE.STABILIZED SURFACES SHALL BE OF SUFFICIENT LENGTH/WIDTH TO PROVIDE VEHICLE AGGE55/PARKING, -CONCRETE TRUCKS,PUMPERS,OR OTHER CONCRETE COATED EQUIPMENT ARE WASHED ON-51TE. NOTE: IF LE55 THAN CONDITIONS OF USE BASED ON LOT SIZE/CONFIGURATION.ON LARGE COMMERCIAL,HIGHWAY,AND ROAD PROJECTS,THE DESIGNER SHOULD FERTILIZERS AND OTHER LANDSCAPING AND HOUSEHOLD/INDUSTRIAL CHEMICALS,THE CONCENTRATION OF PET 10 CONCRETE TRUCKS OR PUMPERS NEED TO BE WASHED OUT ON-SITE,THE WASHWATER MAY BE DISPOSED OF IN A USE WATTLES: INCLUDE ENOUGH EXTRA MATERIALS IN THE CONTRACT TO ALLOW FOR ADDITIONAL STABILIZED ENTRANCES NOT SHOWN WASTES,AND POLLUTANTS THAT ACCOMPANY ROADSIDE LITTER.ESTABLISHING 501E QUALITY AND DEPTH REGAINS o FORMED AREA AWAITING CONCRETE OR AN UPLAND 015POSAL SITE WHERE IT WILL NOT CONTAMINATE SURFACE OR -IN DISTURBED AREAS THAT REQUIRE IMMEDIATE EROSION PROTECTION. IN THE INITIAL CONSTRUCTION SWPPP.IT 15 DIFFICULT TO DETERMINE EXACTLY WHERE AGGE55 TO THESE PROJECTS GREATER 5TORMWATER FUNCTIONS.IN THE POST DEVELOPMENT LAN050APE,PROVIDES INCREASED TREATMENT OF 5-14-18 W GROUND WATER.THE UPLAND DISPOSAL SITE SHALL BE AT LEAST 50 FEET FROM SENSITIVE AREAS SUCH AS STORM -ON EXPOSED SOILS DURING THE PERIOD OF SHORT CONSTRUCTION DELAYS,OR OVER WINTER MONTHS. WILL TAKE PLACE;ADDITIONAL MATERIALS WILL ENABLE THE CONTRACTOR TO INSTALL THEM WHERE NEEDED. POLLUTANTS AND SEDIMENTS THAT RESULT FROM DEVELOPMENT AND HABITATION,AND MINIMIZES THE NEED FOR SOME a LANDSCAPING CHEMICALS,THUS REDUCING POLLUTION THROUGH PREVENTION. DRAINS,OPEN DITCHES,OR WATER BODIES,INCLUDING WETLANDS. -ON SLOPES REQUIRING STABILIZATION UNTIL PERMANENT VEGETATION CAN BE ESTABLISHED. APPLICATIONS AND LIMITATIONS -THE MATERIAL USED DICTATES THE EFFECTIVENESS PERIOD OF THE WATTLE.GENERALLY,WATTLES ARE TYPICALLY NOT TO SCALE ESTABLISHING A MINIMUM SOIL QUALITY AND DEPTH 15 NOT THE SAME AS PRESERVATION OF NATURALLY OCCURRING - EFFECTIVE FOR ONE TO TWO SEASONS. SOIL AND VEGETATION.HOWEVER,ESTABLISHING A MINIMUM SOIL QUALITY AND DEPTH WILL PROVIDE IMPROVED ON-SITE -PREVENT RILLING BENEATH WATTLES BY PROPERLY ENTRENCHING AND ABUTTING WATTLES TOGETHER TO PREVENT 3m Mirmimum MANAGEMENT OF STORMWATER FLOW AND WATER QUALITY.501E ORGANIC MATTER CAN BE ATTAINED THROUGH � Z WATER FROM PASSING BETWEEN THEM. NUMEROUS MATERIALS SUCH AS COMPOST,COMPOSTED WOODY MATERIAL,BI050LID5,AND FOREST PRODUCT Z Lath and flagging RESIDUALS.IT 15 IMPORTANT THAT THE MATERIALS USED TO MEET THE SOIL QUALITY AND DEPTH BMP BE APPROPRIATE Cn 0 WISE,IT IS IMPORTANT THAT IMPORTED TOP50IL5 (1 j -INSTALL WATTLES PERPENDICULAR TO THE FLOW DIRECTION AND PARALLEL TO THE SLOPE CONTOUR. Q Sandbag IMPROVE SOIL CONDITIONS AND DO NOT HAVE AN EXCESSIVE PERCENT OF CLAY FINES.THIS BMP CAN BE CONSIDERED -NARROW TRENCHES SHOULD BE DUG ACROSS THE SLOPE ON CONTOUR TO A DEPTH OF 3-TO 5-INCHES ON CLAY SOILS INFEASIBLE ON TILL 501L 5LOPE5 GREATER THAN 33 PERCENT. AND SOILS WITH GRADUAL SLOPES.ON LOOSE SOILS,STEEP 5LOPE5,AND AREAS WITH HIGH RAINFALL,THE TRENCHES ..ii Berm Sandtrag Q'�V DESIGN GUIDELINES 10 mil plastic limn SHOULD BE DUG TO A DEPTH OF 5-TO 7-INCHES,OR 1/2 TO 2/5 OF THE THICKNESS OF THE WATTLE. ,,r� , P 9 r�1St11 501L RETENTION.RETAIN,IN AN UNDI5TURBED STATE,THE DUFF LAYER AND NATIVE TOP501L TO THE MAXIMUM EXTENT g ('� -START BUILDING TRENCHES AND INSTALLING WATTLES FROM THE BASE OF THE SLOPE AND WORK UP.SPREAD 4^ PRACTICABLE.IN ANY AREAS REQUIRING GRADING REMOVE AND STOCKPILE THE DUFF LAYER AND TOPSOIL ON 517E IN A , Varies 1 I p 0 A EXCAVATED MATERIAL EVENLY ALONG THE UPHILL SLOPE AND COMPACTED U51NG HAND TAMPING OR OTHER METHODS. 0 DESIGNATED,CONTROLLED AREA,NOT ADJACENT TO PUBLIC,RESOURCES AND CRITICAL AREAS,TO BE REAPPLIED TO a -CONSTRUCT TRENCHES AT INTERVALS OF 10-TO 25-FEET DEPENDING ON THE STEEPNESS OF THE SLOPE,501L TYPE, ' _,.I x OTHER PORTIONS OF THE 51TE WHERE FEASIBLE. xi thin A AND RAINFALL.THE STEEPER THE SLOPE THE CLOSER TOGETHER THE TRENGHE5. 70 501L QUALITY.ALL AREAS SUBJECT TO CLEARING AND GRADING THAT HAVE NOT BEEN COVERED BY IMPERVIOUS o ' -INSTALL THE WATTLES SNUGLY INTO THE TRENCHES AND ABUT TIGHTLY END TO END.DO NOT OVERLAP THE ENDS. - ' • Berm { + •"'" SURFACE,INCORPORATED INTO A DRAINAGE FACILITY OR ENGINEERED A5 STRUCTURAL FILL OR SLOPE SHALL,AT $"z -INSTALL STAKES AT EACH END OF THE WATTLE,AND AT 4-FOOT CENTERS ALONG ENTIRE LENGTH OF WATTLE. - PROJECT COMPLETION,DEMONSTRATE THE FOLLOWING: 0 O 74 -IF REQUIRED, INSTALL PILOT HOLES FOR THE STAKES USING A STRAIGHT BAR TO DRIVE HOLES THROUGH THE WATTLE 100'min. 1.A TOPSOIL LAYER WITH A MINIMUM ORGANIC MATTER CONTENT OF 10%DRY WEIGHT IN PLANTING BEDS,AND 5% s Section A-A AND INTO THE SOIL. ORGANIC MATTER CONTENT IN TURF AREAS,AND A PH FROM 5.0 TO 8.0 OR MATCHING THE PH OF THE UNDISTURBED BOIL. 5 10 mil plastic lining -WOODEN STAKES SHOULD BE APPROXIMATELY 3/4 X 3/4 X 24 INCHES MIN.WILLOW CUTTINGS OR 3/8-INGH REBAR CAN �� � a Plan THE TOP501L LAYER SHALL HAVE A MINIMUM DEPTH OF EIGHT INCHES EXCEPT WHERE TREE ROOTS LIMIT THE DEPTH OF Notes: AL50 BE USED FOR STAKES. E 1. Actual layout 1 r INCORPORATION OF AMENDMENTS NEEDED TO MEET THE CRITERIA.5UBSOIL5 BELOW THE TOPSOIL LAYER SHOULD BE determined in the field. -STAKES SHOULD BE DRIVEN THROUGH THE MIDDLE OF THE WATTLE,LEAVING 2 TO 3 INCHES OF THE STAKE e ., ., Install driveway 5CARIFIED AT LEAST 4 INCHES WITH 50ME INCORPORATION OF THE UPPER MATERIAL TO AVOID STRATIFIED LAYERS, s Type Below Grade 2. A Concrete washout PROTRUDING ABOVE THE WATTLE. sign daft be installed culvert if there is a WHERE FEASIBLE. b within 10 m of the roadside ditch present 4"-8"quarry - - 2.MULCH PLANTING BEDS WITH 2 INCHES OF ORGANIC MATERIAL. s MAINTENANCE STANDARDS temporary umrxele spells 4/ 3.USE COMPOST AND OTHER MATERIALS THAT MEET THESE ORGANIC CONTENT REQUIREMENTS o 3m Minimum Washout facility. , -WATTLES MAY REQUIRE MAINTENANCE TO ENSURE THEY ARE IN CONTACT WITH BOIL AND THOROUGHLY ENTRENCHED, I- "` j A.THE ORGANIC CONTENT FOR"PRE-APPROVED"AMENDMENT RATES CAN BE MET ONLY U51NG COMPOST MEETING ESPECIALLY AFTER SIGNIFICANT RAINFALL ON STEEP SANDY SOILS. - THE COMPOST SPECIFICATION FOR BMP T7.30:SIORETENTION CELLS,5WALE5,AND PLANTER BOXES(P.g5q),WITH THE W1bod frenme t EXCEPTION THAT THE COMP05T MAY HAVE UP TO 35%5105OLIDS OR MANURE.THE COMPOST MUST ALSO HAVE AN B B securely fastened Geotex6le 1 ORGANIC MATTER CONTENT OF 40%TO 65%,AND A CARBON TO NITROGEN RATIO BELOW 25:1.THE CARBON TO NITROGEN ' around entire '} u RATIO MAY BE AS HIGH AS 35:1 FOR PLANTINGS COMP05ED ENTIRELY OF PLANTS,NATIVE TO THE PUGET SOUND perimeter wdh two 3'-4' 4 stakes (12m) _ _ LOWLANDS REGION. u Venues 1 o mil ~� ' h B.CALCULATED AMENDMENT RATES MAY BE MET THROUGH USE OF COMPOSTED MATERIAL MEETING(A.)ABOVE;OR 4 plastic lining ,J� + OTHER ORGANIC MATERIALS AMENDED TO MEET THE CARBON TO NITROGEN RATIO REQUIREMENTS,AND NOT 13 .t, ,f �`EIDi` �'.. EXCEEDING THE CONTAMINANT LIMITS IDENTIFIED IN TABLE 220-8,TESTING PARAMETERS, IN WAG 173-350-220. J IWI� 18 n at. \ �� ` Notes' THE RESULTING 501E SHOULD BE CONDUCIVE TO THE TYPE OF VEGETATION TO BE ESTABLISHED. � Stake(to.) 1. Driveway shall meet O Straw rafts must be ' .. // 12'minimum thickness L IMPLEMENTATION OPTIONS:THE 501L QUALITY DESIGN GUIDELINES LISTED ABOVE CAN BE MET BY USING ONE OF THE '+. Section B-B placed along slope / Arlyacert rots the equremernsofthe V permitting agency. METHODS LISTED BELOW: tY i 10 mil plastic lining Contours Jj shalltightly abut 1.LEAVE UNDISTURBED NATIVE VEGETATION AND SOIL,AND PROTECT FROM COMPACTION DURING CONSTRUCTION. C4 Two-stacked 2. It is recommended that rance ProVlde full wWOrleg 2.AMEND EXISTING SITE TOPSOIL OR SUB501L EITHER AT DEFAULT"PRE-APPROVED"RATES,OR AT CUSTOM 2x12 rough Plan the entrance be of irgressress O area CALCULATED RATES BASED ON TESTS OF THE 501L AND AMENDMENT. Q V wood frame v 1, f�,/ :. crowned sn that runoff 3.STOCKPILE EXISTING TOPSOIL DURING GRADING,AND REPLACE IT PRIOR TO PLANTING.STOCKPILED TOPSOIL MUST dri #me pad drains off W. L Type "Above Grade" with Wood Planks ALSO BE AMENDED IF NEEDED TO MEET THE ORGANIC MATTER OR DEPTH REQUIREMENTS,EITHER AT A DEFAULT"PRE- Z a W co n NOT TO SCALE - APPROVED"RATE OR AT A CUSTOM CALCULATED RATE. (n H "t it 4.IMPORT TOPSOIL MIX OF SUFFICIENT ORGANIC CONTENT AND DEPTH TO MEET THE REQUIREMENTS. x m 10'-25"(3,Brn) Q\ �/ MORE THAN ONE METHOD MAY BE USED ON DIFFERENT PORTIONS OF THE SAME SITE.BOIL THAT ALREADY MEETS THE ca 0 CA rA Figure 11-4.1 .7a ti Figure I1-4.1 .1 DEPTH AND ORGANIC MATTER QUALITY STANDARDS,AND 15 NOT COMPACTED,DOES NOT NEED TO BE AMENDED. J Z d Z O+ Concrete Was hout Area Stabilized Construction Entrance MAINTENANCE 1A d Co Revised June Zing Spacing��A DEPARTMENT Of s Revised June 2015 -ESTABLISH SOIL QUALITY AND DEPTH TOWARD THE END OF CONSTRUCTION AND ONCE ESTABLISHED,PROTECT DEPARTMENT OF C OO G 1 L 1 f+V `EllO FROM COMPACTION,SUCH A5 FROM LARGE MAGHINERY USE,AND FROM ERO510N. E Please see hftp1Avww.ecy.wa.goWcapyMjht.Mad for copyrght notice including pernxsftas, slope steepness Sediment-Organic matter. ECOLGY Pose see httpYAVww.ecy.wa.gov/copyrighr.Mml for copyright notice including permissions, -PLANT VEGETATION AND MULCH THE AMENDED SOIL AREA AFTER INSTALLATION. LU and native seeds are State of Washington limitation of liability.and disclaimer- captured behind the rolls. State of Washington limitation of liability.and disclaimer. -LEAVE PLANT DEOR15 OR ITS EQUIVALENT ON THE BOIL SURFACE TO REPLENISH ORGANIC MATTER. -REDUCE AND ADJUST,WHERE POSSIBLE,THE USE OF IRRIGATION,FERTILIZERS,HERBICIDES AND PESTICIDES, V _ V- RATHER THAN CONTINUING TO IMPLEMENT FORMERLY ESTABLISHED PRACTICES. O Z I.0 CN O BMP C1230: SURFACE ROUGHENING O STORM DRAIN INLET PROTECTION I-40.20-00 7 ,,,( Purpose: 1.SIZE THE BELOW INLET GRATE DEVICE(BIGD)FOR THE STORM WATER STRUCTURE IT WILL SERVICE $ 7 x Q BMP G233: SILT FENCE Y` Surface roughening aids in the establishment of vegetative cover,reduces runoff velocity,increases infiltration,and provides ftjl sediment trapping through the provision of a rough soil surface.Horizontal depressions are created by operating a tiller or other suitable uipment 3--5-(75-1P5�) 2.THE BIGD SHALL HAVE A BUILT IN HIGH-FLOW RELIEF SYSTEM(OVERFLOW BYPASS). PURPOSE on the contour or by leaving slopes in a roughened condition by not fine grading them.Use this BMP in conjunction with other BMPs such .;,` USE OF A SILT FENCE REDUCES THE TRANSPORT OF COARSE SEDIMENT FROM A CONSTRUCTION 517E BY PROVIDING A 1-- as seeding,mulching,or sodding. �� TEMPORARY PHYSICAL BARRIER TO SEDIMENT AND REDUCING THE RUNOFF VELOCITIES OF OVERLAND FLOW.5EE FIGURE Ia \ ` ` 8'-10"Dia. 3 THE RETRIEVAL SYSTEM MUST ALLOW REMOVAL OF THE BIGD WITHOUT SPILLING THE COLLECTED MATERIAL. CONDITIONS OF USE: / 1 �� (200-250mm) IIA.2.12 SILT FENCE(P.369)FOR DETAILS ON SILT FENCE CONSTRUCTION. w ■ . ■ -AIL slopes steeper than 3HA V and greater than 5 vertical feet require surface roughening to a depth of 2 to 4 inches prior to seeding. 1.�', f 4.PERFORM MAINTENANCE IN ACCORDANCE WITH STANDARD SPECIFICATION 8-01.3(15). w -Areas that will not be stabilized immediately may be roughened to reduce runoff velocity until seeding takes place. CONDITIONS OF USE Live �l J -Slopes with a stable rock face do not require roughening. Live SILT FENCE MAY BE USED DOWNSLOPE OF ALL DISTURBED AREAS. w -Slopes where mowing is planned should not be excessively roughened. V f SILT FENCE SHALL PREVENT SOIL CARRIED BY RUNOFF WATER FROM GOING BENEATH,THROUGH,OR OVER THE TOP OF ', 1 ter`-r^�� fd/1'x 1"Slake r THE SILT FENCE,BUT SHALL ALLOW THE WATER TO PASS THROUGH THE FENCE. fts.� (� (25 x 25mm) °�� Her SILT FENCE 15 NOT INTENDED TO TREAT CONCENTRATED FLOWS, NOR 15 IT INTENDED TO TREAT SUBSTANTIAL AMOUNTS +F �yi OF OVERLAND FLOW.CONVEY ANY CONCENTRATED FLOW5 THROUGH THE DRAINAGE SYSTEM TO A SEDIMENT POND. W O "`— �/`t \, NOTE: °M1E� DO NOT CONSTRUCT SILT FENCES 1N STREAMS OR USE IN V-SHAPED DITCHES.SILT FENCES DO NOT PROVIDE AN —� L , l A 1. Straw roll installation requires the placement and secure staking ^ ADEQUATE METHOD OF SILT CONTROL FOR ANYTHING DEEPER THAN SHEET OR OVERLAND FLOW. t of the roll in a bench.3"-5"(75-125mm)deep,dug on co hour. RunoN must not be allayed to run under of around roll. NOT TO SCALE z o at Joints Use Staples m nsplicedg rm a Figure II-4.2.14 ,.� a�r,.�r�„E `w uivalent to attach fabric to posts Wattles 2"x2'by 14 Ga-wire or equivalent, a •O r� �a �- ; DEPARTMENT OF Revised November 2015 ,f standardstre-glh'atnc used a ECOLOGY Please see hRpJAvww.ecy-wa.gdwtrupynghLlttmr far copyright notice including permissions, " II p - State of Washington frtritation of liability.and disclaimer. TtaCking nth machinery up amd down 91� a as O BMP G123: PLASTIC COVERING a the slope provides grooves that will R o� catch seed,rainfall.and reduce rurkrft. ei a�' as PURPOSE: - Zs83' xcz. PLASTIC COVERING PROVIDES IMMEDIATE,SHORT-TERM ER05ION PROTECTION TO SLOPES AND DISTURBED AREAS. • 3wis ow is rarmrwre V / `/ `/� i gNsxm -_ _--_-- Tracking CONDITIONS OF USE: rr __- PLASTIC COVERING MAY BE USED ON DISTURBED AREAS THAT REQUIRE COVER MEASURES FOR LE55 THAN 30 DAYS, Minimum I G rrrax 0I =w$ y EXCEPT AS STATED BELOW. 4"x4'trench PLASTIC 15 PARTICULARLY USEFUL FOR PROTECTING GUT AND FILL SLOPES AND STOCKPILES.NOTE:THE RELATIVELY RAPID BRFAKDOWN OF MOST POLYETHYLENE SHEETING MAKES IT UNSUITABLE FOR LONG-TERM(GREATER THAN 51X Post spacing may be increased to 8'if wire backing is used 2'x2'wood posts.steel MONTHS)APPLICATIONS. fence posts or equivalent a o 1260 1 -DUE TO RAPID RUNOFF CAUSED BY PLASTIC COVERING,DO NOT USE THIS METHOD UP5LOPE OF AREAS THAT MIGHT BE _ + �m sr ov N, a f"� xsmNva srs�,trw.l o o$ ADVERSELY IMPACTED BY CONCENTRATED RUNOFF.SUCH AREAS INCLUDE STEEP AND/OR UNSTABLE SLOPES. /'�� r�(1 -PLASTIC SHEETING MAY RESULT IN INCREASED RUNOFF VOLUMES AND VELOCITIE5,REQUIRING ADDITIONAL ON-51TE poi MEASURES TO COUNTERACT THE INCREASES.CREATING A TROUGH WITH WATTLES OR OTHER MATERIAL CAN CONVEY 2"x2'by 14 Ga.wire or equivalent. w�� GLEAN WATER AWAY FROM THESE AREAS. — ---."� if standard strength fabric used ME 6 _ -TO PREVENT UNDERCUTTING,TRENCH AND BAGKFILL ROLLED PLASTIC COVERING PRODUCTS. E _ .� - og4zs 50 8 thin -WHILE PLASTIC 15 INEXPENSIVE TO PURCHASE,THE ADDED COST OF INSTALLATION,MAINTENANCE,REMOVAL,AND aM. (15m) (150mm) DISPOSAL MAKE THI5 AN EXPENSIVE MATERIAL,UP TO$1.50-2.00 PER SQUARE YARD. Filter fW,- - oo WHENEVER PLASTIC 15 USED TO PROTECT SLOPES INSTALL WATER COLLECTION MEA5URE5 AT THE BASE OF THE - 2'min `w° / SLOPE.THESE MEASURES INCLUDE PLASTIC,-COVERED BERMS,CHANNELS,AND PIPES USED TO COVEY GLEAN sin ( 3 RAINWATER AWAY FROM BARE SOIL AND DISTURBED AREAS.DO NOT MIX GLEAN RUNOFF FROM A PLASTIC COVERED r \ � �1 Contour Furrows SLOPE WITH DIRTY RUNOFF FROMAPROJEGT. eslow+w.sr owwts oslves Ove�rovr avers trnl Maximum Badkfill trerrnYr with native soil or%*- ��� 1.5'washed gravel i2"iron tij tij\�j OWNER APPROVAL Grooves will catch seed,fertilizer, �U� �� Minimum mulch.rainfall, and decease runoff. G3 1W vencr INITIAL: I _ MARK W.MARE^ PAGE: NOTtO SCALE ISOMETRIC VIEW —�l�CHROWE No.mos 2"x2"wood posts.sW fence posts.or equivalent NOT TO SCALE Figure 11- 4. 1 .5 Surface Roughening by Tracking IN 111111111D1ET10111111 Figure II-4.2.12 and Contour Furrows ������ s„r£r,os,ra�v Silt Fence °F� �P°RO�rare ' Revised October 2014 DEPARTMENT OF Revised June 2015 PMrt:o Bakotich/ ;WW�tff DEPARTMENT OF ECOLOGY ECOLOGYPlease see MtplAvt�vw.ecy.Wa.gdmdCopyrigM.Mml for copyright Halite ntludsrg permissions. •�•...�+••"` "' Please see IYfpJWwwacy.wagwvMpYrighLMmfforcopyright notice Including permissions. State of Washington limitation of liability,and disclaimer. State of Washington limitation ofiabily.and disclaimer,