Title
Department of Transportation recommending the Board consider the following pertaining to the Mosquito Road Bridge at South Fork American River - Bridge Replacement Project, Capital Improvement Program project number 77126/36105028, Contract 5084, with an estimated construction phase total cost of $70,500,000:
1) Approve and adopt the Plans and Contract Documents and authorize the Chair to sign the Plans;
2) Authorize advertisement for construction bids; and
3) Adopt and authorize the Chair to sign Resolution 182-2021 authorizing the Department of Transportation Director the delegated authority to approve a temporary road closure of Mosquito Road for up to seventy (70) calendar days per construction season.
FUNDING: Highway Bridge Program Funds (99.9%) and Sacramento Municipal Utility District Funds (0.1%). (Federal and Local Funds)
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DISCUSSION / BACKGROUND
The Mosquito Road Bridge at South Fork American River Project (Project) will replace the existing Mosquito Road Bridge with a new segmental box girder bridge over the South Fork American River on Mosquito Road. The Project includes the construction of temporary access; the foundation construction of cast-in-drilled-hole (CIDH) concrete piles, optional micropiles, sub-structure, and super-structure bridge work; the construction of tie back, soil nail, soldier pile, and reinforced concrete retaining walls; and grading, paving, and drainage system improvements for the re-aligned approach roadway. The Project duration is 580 working days and is anticipated to be complete by winter 2024.
The Project will maintain traffic along Mosquito Road during most of the construction of the bridge and close the road during school summer break for a maximum of seventy (70) calendar days per year. The purpose of the closures are to construct the roadway approach tie-ins to the existing Mosquito Road, intermittent closures for deliveries of large equipment and materials, and intermittent closures as needed for publ...
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