TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: Sydney Barclay, Associate Engineer
SUBJECT: Approval of Plans and Specifications and Authorization to Advertise for Bids for the "Chiles Pope Valley Road MPM 3.63 Culvert Repair Project", RDS 22-27
RECOMMENDATION
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Approve the Plans and Specifications for the "Chiles Pope Valley Road MPM 3.63 Culvert Repair Project" and authorize to advertise for sealed bids, and opening of the bids at a time, date, and location to be published by the Director of Public Works pursuant to Section 20150.8 of the Public Contract Code. (No Fiscal Impact; Discretionary)
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BACKGROUND
The Chiles Pope Valley Rd MPM 3.63 project started off as a guardrail replacement project, however, after further inspection, the existing bank located below the guardrails was eroded and the culvert is incapable of handling the flows of lower Chiles Creek. The Chiles Pope Valley Road MPM 3.63 project required hydraulic, geotechnical, archaeological, and biological studies to determine the most suitable repair to the culvert at this location. As a result of these studies, the County will be removing existing concrete wingwalls at the project site, constructing new concrete wingwalls on each side of the culvert (upstream and downstream), pouring a concrete slab approach at the inlet of the culvert, providing rock slope protection at the outlet of the culvert, and providing safety improvements on the roadway, which include new guardrails and concrete bridge barriers.
Moreover, because these repairs will occur within the channel and banks of lower Chiles Creek, the United States Army Corps of Engineers, the California Department of Fish and Wildlife, and the San Francisco Regional Water Quality Control Board required the County to obtain permits. These agencies have implemented strenuous requirements on the Chiles Pope Valley Road MPM 3.63 Project and require Tribal Monitoring, Biological Studies and Monitoring, an...
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