To: Board of Supervisors
From: Warren Lai, Public Works Director/Chief Engineer
Report Title: APPROVE the Bethel Island Road Sinkhole and Culvert Repair Project and take related actions under CEQA
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Bethel Island Road Sinkhole and Culvert Repair Project and AUTHORIZE the Public Works Director, or designee, to advertise the Project, Bethel Island area. [County Project No. 0672-6U6253/ Federal Project No. ER-15J7(171), DCD-CP#24-25 (District III).
DETERMINE the Project is a California Environmental Quality Act (CEQA), Categorical Exemption, pursuant to Article 19, Section 15301(c) of the CEQA Statute and Guidelines, and
DIRECT the Director of Department of Conservation and Development (DCD), or designee, to file a Notice of Exemption (NOE) with the County Clerk, and
AUTHORIZE the Public Works Director, or designee, to arrange for payment of a $25 fee to DCD for processing, and a $50 fee to the County Clerk for filing the NOE.
FISCAL IMPACT:
Estimated Project cost: $851,000. 54% Federal Emergency Relief Funds, 46% Local Road Funds.
BACKGROUND:
The purpose of this project is to replace a failing culvert beneath Bethel Island Road with a new culvert and to repair the roadway. The existing culvert is 48-inch diameter corrugated metal pipe (CMP) culvert that will be replaced with a 54-inch diameter reinforced concrete pipe and two concrete flared ends. The culvert conveys water flows from an artificial drainage ditch. Full replacement would generally include excavation to the pipe depth, removal of the existing culvert, installation of the new culvert, trench backfill, placement of rock slope protection, placement of aggregate base and hot mix asphalt, and roadway striping. Excavations up to approximately 13 feet beneath the roadway are anticipated for the culvert replacement. All heavy machinery will be operated from the existing roadway. All equipment will be operated from the top of the ditch embankment.
CONSEQUENCE OF NEGATIVE ACTION:
Delay in approving the project may result in a delay in design and construction and may jeopardize funding.