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C. 10

To:	Board of Supervisors
From:	Brian M. Balbas, Public Works Director/Chief Engineer
Date:	May 22, 2018

Contra

Costa

County

Subject:

APPROVE & AUTHORIZE to advertise Orwood Road Culvert Replacement Project, Knightsen area

APPROVE	OTHER
RECOMMENDATION OF CNTY ADMINISTRATOR	RECOMMENDATION OF BOARD COMMITTEE

Action of Board On: 05/22/2018

APPROVED AS RECOMMENDED

OTHER

Clerks Notes:

VOTE OF SUPERVISORS

AYE:

John Gioia, District I Supervisor
Candace Andersen, District II Supervisor
Diane Burgis, District III Supervisor
Karen Mitchoff, District IV Supervisor
Federal D. Glover, District V Supervisor

Contact:

Kevin Emigh, 925-313-2233

I hereby certify that this is a true and correct copy of an action taken and entered on the minutes of the Board of Supervisors on the date shown.
ATTESTED: May 22, 2018
David Twa,

BY:	, Deputy

RECOMMENDATION(S):

APPROVE the Orwood Road Culvert Replacement Project and AUTHORIZE the Public Works Director, or designee, to advertise the project, Knightsen area. (Project No. 0672-6U2342) (District III)

FISCAL IMPACT:

The project will be funded by 100% Local Road Funds.

BACKGROUND:

The purpose of this project is to replace a collapsed culvert at Orwood Road and restore the roadway. This project is needed to prevent further distress and potential settlement to the roadway, and restore proper drainage. The 46’-long culvert is a 43”x27” (Span x rise) arch. Corrugated metal pipe connects two drain inlets located on the northern and southern sides of the roadway.

BACKGROUND: (CONT'D)

This project is covered by the California Department of Fish and Wildlife under a Routine Maintenance Agreement (RMA) under Section 1602 of the Fish and Game Code. CEQA was previously approved for all actions under the RMA and a Notice of Exemption was posted on March 1, 2011. The activities covered under the RMA consist of routine maintenance activities that pose minimal threat to water quality, and beneficial uses of the creeks within the County when appropriate Best Management Practices (BMPs) are implemented. Project-specific BMPs that will be implemented include the installation of a temporary Type ESA/Silt fence around the Environmentally Sensitive Area located at the southern drainage inlet before start of work, as well as limiting construction activities to the previously developed roadway area.

CONSEQUENCE OF NEGATIVE ACTION:

Delay in authorizing advertisement will result in significant delay of construction up to a full year causing further deterioration to the roadway, which may ultimately result in an unusable condition of the roadway.