4A Presentations 2018 0507 - Laserfiche WebLink

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Summary Removal of dredge material within the DMMS and transport to Oyster Bay Regional Shoreline. Description The November 2009 dredging event removed 90,000 CY of material from the Jack Maltester Channel into the City’s Dredged Material Management Site (DMMS). As required by RWQCB Order No. 90-013, over a 1 –2 year period, excess water will be decanted and the material allowed to dry out, then the material will be removed to a permanent off-site location. The scope includes the following tasks: 1. Soil sampling for acceptance at fill site 2. Soil testing to quantify material properties 3. Application for and acquisition of applicable permits 4. Preparation of plans, specifications and bid documents 5. Conditioning and preparation of the wet material 6. Off-hauling the material once it has achieved not more than 50% moisture content. 7. Re-grading of DMMS back to existing condition with the re-establishment of ten refuge islands that were in place prior. The permanent off-site location is yet to be determined. Possible sites include: Monarch Bay Golf Club; Oyster Bay Regional Shoreline (OBRS); and Altamont Landfill. For estimating purposes removal to both OBRS is shown Justification or Benefit of Project This project is required if the harbor and/or channel are to be dredged. If the harbor is dredged again, the dredge materials placed at the site in November 2009 must be removed to make room for the new materials. Consequences of not doing the Project The City is only allowed to store a finite amount of dredge materials at the site. The City would be in non-compliance with a state permit if it failed to remove the materials when the harbor is dredged. In addition, no further dredging can occur without Project Numb 2003.2620Project Typ Marina and Shoreline Detailed Cost $4,720,000 Status Retired Department/Sponsor Public Works Impact to Operation Cost Impact to Maintenance Cost Likely Cost Categor Project Name Dredged Material Removal 116