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C. 13

To:	Contra Costa County Flood Control District Board of Supervisors
From:	Julia R. Bueren, Public Works Director/Chief Engineer
Date:	November 10, 2015

Contra

Costa

County

Subject:

Contract Amendment with Environmental Science Associates, for Lower Walnut Creek Restoration Project, Martinez area. Project No. 7520-6B8285

APPROVE	OTHER
RECOMMENDATION OF CNTY ADMINISTRATOR	RECOMMENDATION OF BOARD COMMITTEE

Action of Board On: 11/10/2015

APPROVED AS RECOMMENDED

OTHER

Clerks Notes:

VOTE OF SUPERVISORS

AYE:

John Gioia, District I Supervisor
Candace Andersen, District II Supervisor
Mary N. Piepho, District III Supervisor
Karen Mitchoff, District IV Supervisor

ABSENT:

Federal D. Glover, District V Supervisor

Contact:	Carl Roner (925) 313-2213
cc:	Steve Kowalewski, Deputy Chief Engineer Mike Carlson, Flood Control Paul Detjens, Flood Control Carl Roner, Flood Control Catherine Windham, Flood Control

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: November 10, 2015
David Twa,

BY:	, Deputy

RECOMMENDATION(S):

APPROVE and AUTHORIZE the Chief Engineer, Contra Costa County Flood Control and Water Conservation District (FC District), or designee, to execute Contract Amendment No. 1 with Environmental Science Associates, to increase the payment limit by $35,000 to a new payment limit of $590,042, and add planning and project development services for the Lower Walnut Creek Restoration Project, with no change to the original term, Martinez area. (100% Flood Control District Zone 3B Funds)

FISCAL IMPACT:

This project is 100% funded by Flood Control Zone 3B (Walnut Creek watershed) funds.

BACKGROUND:

On June 25, 2013, the Board of Supervisors authorized the FC District to remove the lowest 4 miles of the Army Corps of Engineers’ “Walnut Creek Project” from Corps oversight. The FC District sought this removal to return the facility to local control and permit the FC District to manage it in a more sustainable manner. Legislation was subsequently introduced to selectively deauthorize Lower Walnut Creek from the system. This legislation was approved by Congress and signed by President Obama on June 10, 2014.

With the facility under local control, the FC District has the ability to proceed with the Lower Walnut Creek Restoration Project, which encompasses the lowest 4 miles of Walnut Creek and Pacheco Creek. The objective of this project is to transform this stretch of channel to a sustainable flood control facility.

This amendment provides for the following:
a. Additional funds to provide floodplain core analysis;
b. Additional funds to provide hydraulic modeling of ecologically significant flows;
c. Additional funds to provide for sea level rise modeling; and
d. Provide for additional modeling and analysis services to be performed by Contractor.

CONSEQUENCE OF NEGATIVE ACTION:

If the amendment is not approved, the consultant will not be able to perform the additional work or be paid for it.

VOTE OF SUPERVISORS

RECOMMENDATION(S):

FISCAL IMPACT:

BACKGROUND:

CONSEQUENCE OF NEGATIVE ACTION:

CHILDREN'S IMPACT STATEMENT: