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completed in October or November over a 2-3 week period (2-3 piles <br />per day). <br />Reference: 2021. Echelon Engineering. Underwater Inspection & <br />Assessment of Piles & Floats Fidalgo Marina. Anacortes, WA. <br />Prepared for PND Engineers, Inc. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />These piles will be repaired using an <br />internal pile repair system. Repair <br />system will be CarboSleeve (sleeve) <br />or CarboShield (also referred to as a <br />temporary jacket or formwork <br />herein) or approved equivalent. The <br />temporary jackets or equivalent will <br />be applied to the perforated portions <br />of the pile to prevent grout from <br />entering marine waters (Figure 3). <br />Temporary formwork will be <br />applied to the perforated portions of <br />the pile to prevent grout from <br />entering marine waters. Temporary <br />formwork, to be provided by the <br />contractor, could be fabricated from <br />steel/timber or other acceptable <br />materials. The sleeves will be <br />inserted into the existing batter piles <br />and grout pumped into the sleeve to <br />reinforce and strengthen the batter pile (Figure 4). Work will be performed from a barge; utilizing divers <br />as required. <br /> <br />The anticipated sequence for repair follows: <br /> <br />1. Install temporary formwork at locations of pile perforations. <br />2. Cut access hole near the top of the pile. <br />3. Clean internal walls of pile by pressure blasting. Debris from cleaning will be contained and remain <br />inside the pile cavity. <br />4. Install fiber reinforced sleeves inside the pile cavity through the access hole. <br />5. Epoxy grout is pumped into sleeves from the bottom of pile so it displaces the water upward as the grout <br />fills the void. This keeps the grout from mixing with the water <br />6. Once grout has cured, temporary formwork is removed. <br /> <br /> <br />Figure 2 Figure 2 Example of batter <br />pile with corrosion to point of <br />perforation (Echelon 2021). <br />Figure 3 CarboShield TM (jacket or equivalent to be applied to perforations prior <br />to grout injection.