Agenda

Return

C. 1

To:	Board of Supervisors
From:	Julia R. Bueren, Public Works Director/Chief Engineer
Date:	September 15, 2015

Contra

Costa

County

Subject:

APPROVE the Las Trampas Creek Repair at Boulevard Way Bridge Project and related actions under the California Environmental Quality Act.

APPROVE	OTHER
RECOMMENDATION OF CNTY ADMINISTRATOR	RECOMMENDATION OF BOARD COMMITTEE

Action of Board On: 09/15/2015

APPROVED AS RECOMMENDED

OTHER

Clerks Notes:

VOTE OF SUPERVISORS

AYE:

John Gioia, District I Supervisor
Candace Andersen, District II Supervisor
Karen Mitchoff, District IV Supervisor

ABSENT:

Mary N. Piepho, District III Supervisor
Federal D. Glover, District V Supervisor

Contact:	A. Nattkemper, Environmental (925) 313-2364
cc:	A. Nattkemper, Environmental Services L. Mangabay, Finance H. Finch, Maintenance Division

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: September 15, 2015
David Twa,

BY:	, Deputy

RECOMMENDATION(S):

APPROVE the Las Trampas Creek Repair at Boulevard Way Bridge Project (Project), as recommended by the Public Works Director, Walnut Creek area, [County Project No. 0672-6U2507, DCD-CP#12-35] (District II), and


DETERMINE the Project is a California Environmental Quality Act (CEQA), Class 1(c) Categorical Exemption, pursuant to Article 19, Section 15301 of the CEQA Guidelines, and

RECOMMENDATION(S): (CONT'D)

DIRECT the Director of Conservation and Development to file a Notice of Exemption with the County Clerk, and

AUTHORIZE the Public Works Director to arrange for payment of a $25 fee to Conservation and Development for processing, and a $50 fee to the County Clerk for filing the Notice of Exemption.

FISCAL IMPACT:

100% Local Road Funds.

BACKGROUND:

A scour hole approximately 3 feet deep, 45 feet long and 20 feet wide has developed on the upstream side of Boulevard Way Bridge around the column footings. The streambed has scoured down to sandstone bedrock and may eventually impact the mid-span bridge column footings. There is also scouring at the toe of the slope of the south bridge abutment, which is armored with grouted riprap. The scour is approximately 50 feet long, 2 feet deep and extends approximately 3 feet horizontally under the riprap. The Project consists of filling the scour hole upstream of the bridge’s mid-span column and at the toe of the slope along the south abutment with riprap.

CONSEQUENCE OF NEGATIVE ACTION: