Agenda

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C. 7

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

Contra

Costa

County

Subject:

Contract Amendment with T.Y. Lin International, Brentwood area.

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:

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: September 15, 2015
David Twa,

BY:	, Deputy

RECOMMENDATION(S):

APPROVE and AUTHORIZE the Public Works Director, or designee, to execute Contract Amendment No. 6 to the Consulting Services Agreement with T.Y. Lin International (TYLin), effective January 1, 2015, to increase the payment limit by $153,300 to a new payment of $929,345, to provide design, environmental, and construction support services for the Orwood Road Bridge Replacement Project, Brentwood area. (Project No. 0662-6R4076)

FISCAL IMPACT:

CSA Amendment No. 6 allows for an additional $153,300 above the previously approved contract payment limit of $776,045. The increase in payment is to be funded by 80% Federal Funds and 20% Local Road Funds.

BACKGROUND:

The existing Orwood Road Bridge was constructed in 1947. The bridge is constructed primarily of wood components. As a result of its age and exposure to a marine environment, the bridge is coming to the end of its serviceable life.

On May 5, 2005, the Board of Supervisors approved the CSA for design of the bridge replacement project with TYLin.

On November 27, 2007, the Board approved Amendment No. 1 to the CSA to increase the payment limit by $78,650 for additional bridge design services due to modifications to the bridge design. The modifications included adding an 8-foot wide pedestrian trail on the new bridge and modifying the approach roadway design to minimize the impacts to adjacent property owners.

On June 23, 2009, the Board approved Amendment No. 2 to the CSA to increase the payment limit by $68,320 in order to provide environmental consulting services.

On April 5, 2011, the Board approved Amendment No. 3 to the CSA to increase the payment limit by $125,289 in order to provide additional environmental consulting services and project management services.

On December 6, 2011, the Board approved Amendment No. 4 to the CSA to increase the payment limit by $15,755 in order to provide additional design and environmental services.

On June 4, 2013, the Board approved Amendment No. 5 to the CSA to increase the payment limit by $76,915 in order to provide additional design and environmental services.

Proposed Amendment No. 6 will amend payment limits in order to provide additional design, environmental, and construction support services.

CONSEQUENCE OF NEGATIVE ACTION:

Public Works staff does not have the expertise to perform this work in-house. Negative action will result in the Public Works Department having to hire other environmental and design consultants, which will delay project completion and possibly jeopardize Federal funding.