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<br />DIXON MARINE SERVICES, INC. AN OCEANOGRAPHIC WETLAND, RESTORATION FIRM <br /> <br />415.669.7369 OFFICE P.O.BOX 424, INVERNESS, CA 94937 415.669.7409 FAX <br /> CA LIC. 831300 | WA LIC. DIXONMS860J4 | OR LIC. 211721 <br /> <br /> <br /> <br />June 26, 2024 <br /> <br /> <br />Nylan Nunn <br />City Engineer <br />Community Development and Transportation Department <br />City of Redwood City <br />PO Box 391 <br />Redwood City, CA 94064 <br /> <br />Sent Via Email: nnunn@redwoodcity.org <br /> <br />Subject Redwood Shores Levee Emergency Repair <br /> Redwood City, CA <br /> <br />Dear Mr. Nunn: <br /> <br />Dixon Marine Services, Inc (DMS) is pleased to present a bid for the emergency repair of the levee located in the <br />Redwood Shores Community in Redwood City. The cost estimate is based on the levee repair recommendations <br />provided by Mr. Jeff Fippin from ENGEO Inc. Our approach will be to isolate the breech from the tidal influence <br />from the bay by installing a water filled dam on the outboard and inboard side to the breach. The breach will be <br />dewatered, and the CMP pipe removed if still present. The side slopes will be laid back 2 to 1 in a bench <br />configuration and fill placed in lifts as specified and compacted. The source of backfill has been secured and <br />approved by Mr. Fippin. It is our intention to use about 60 ft of the right lane on Bridge Parkway as an area to <br />stage backfill. The area will be delineated with plastic water filled K rails. Trench plates will be placed on the <br />road surface to protect the asphalt and BMP will be implemented to prevent any sediment migration into storm <br />drains. The cost breakdown is as follows: <br /> <br /> Mobilization: $ 54,541 <br /> Cofferdam Installation: $ 270,360 <br /> Dewatering and Excavation: $ 46,837 <br /> Engineered Backfill $ 180,996 <br /> Trail Restoration: $ 79,855 <br /> Demobilization: $ 29,331 <br /> Total $661,920 <br /> <br />If you have any questions or comments regarding the proposal, please contact me at your earliest convenience. <br />We are prepared to start next week if we can come to an agreement. <br /> <br />Thank you. <br /> <br />Mark A. Sutton, V.P. <br /> <br />Dixon Marine Services, Inc.