To: Board of Supervisors
From: Warren Lai, Public Works Director/Chief Engineer
Report Title: APPROVE the Piper Road Sinkhole and Culvert Repair Project and take related actions under CEQA
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Piper Road Sinkhole and Culvert Repair Project (Project) and AUTHORIZE the Public Works Director, or designee, to advertise the Project, Bethel Island area. [County Project No. 0672-6U6243, DCD-CP#21-23 (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: $700,000. (100% Local Road Funds).
BACKGROUND:
The purpose of the project is to replace a failing culvert beneath Piper Road with a new culvert and to repair the roadway. The existing culvert is 52-inch high x 40-inch wide corrugated steel pipe arch that will be replaced with a 54-inch diameter reinforced concrete pipe and two concrete flared ends. The culvert conveys flows from an artificial drainage ditch. The project will generally consist of trench excavation and backfill, removal of existing pipe, placement of new pipe, placement of rock slope protection, placement of trash racks, placement of aggregate base and asphalt pavement, and delineators and striping. The ditch in the immediate vicinity of the culvert replacement will be dewatered prior to construction.
CONSEQUENCE OF NEGATIVE ACTION:
Delay in approving the project may result in a delay of design, construction, and may jeopardize funding.