HomeMy WebLinkAboutMINUTES - 02032009 - C.07RECOMMENDATION(S):
TERMINATE the emergency action taken by the Board of Supervisors on April 10, 2007,
pursuant to Public Contract Code Sections 22035 and 22050, to implement the Lower
Walnut Creek Interim Protection Measures project, Pacheco area.
FISCAL IMPACT:
The total project cost was $4,612,000 funded by Flood Control Zone 3B Funds.
BACKGROUND:
On April 10, 2007, the Board of Supervisors declared an emergency and authorized the
Chief Engineer to proceed in the most expeditious manner to repair or replace the Lower
Walnut Creek flood control facility as directed by the US Army Corps of Engineers.
The Contra Costa County Flood Control and Water Conservation District (District) prepared
the Lower Walnut Creek Corrective Action Plan (CAP) and presented it to the US Army
Corps of Engineers for consideration on June 11, 2007. The CAP contained two phases of
work. The first phase of the project included significant sediment removal and levee
APPROVE OTHER
RECOMMENDATION OF CNTY
ADMINISTRATOR
RECOMMENDATION OF BOARD
COMMITTEE
Action of Board On: 02/03/2009 APPROVED AS RECOMMENDED OTHER
Clerks Notes:
VOTE OF SUPERVISORS
AYE:John Gioia, District I
Supervisor
Gayle B. Uilkema, District II
Supervisor
Mary N. Piepho, District III
Supervisor
Susan A. Bonilla, District IV
Supervisor
Federal D. Glover, District V
Supervisor
Contact:
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: February 3, 2009
, County Administrator and Clerk of the Board of Supervisors
By: , Deputy
cc:
C.7
To:
From:Julia R. Bueren, Public Works Director/Chief Engineer
Date:February 3, 2009
Contra
Costa
County
Subject:TERMINATE the emergency action from April 10, 2007, regarding the Lower Walnut Creek Interim
Protection Measures Project. Proj #7520-6B8345
BACKGROUND: (CONT'D)
reconstruction and was completed in early December 2007.
The US Army Corps of Engineers (Corps) approved both phases of the CAP on May 19,
2008. The second phase of CAP work included levee reconstruction at selected locations
near the confluence of Walnut and Grayson Creeks. This Phase 2 CAP work was
substantially completed in October 2008. The Corps determined the Lower Walnut Creek
flood control facility to be in minimally acceptable condition upon their inspection on
December 10, 2008. The remaining tasks are focused on mitigating the impacts of both
phases of work. Specifically, this includes adjusting topography in reconstructed marsh
areas to reduce mosquito habitat and revegetating and monitoring areas disturbed by both
phases of work. Continuation of the emergency action would have facilitated grading of
sensitive tidally influenced areas to promote drainage and the consequent reduction in
mosquito habitat. Ongoing monitoring indicates that normal tidal action will reestablish a
natural drainage pattern without further intervention. Therefore, the continuation of the
emergency action is no longer necessary.
CONSEQUENCE OF NEGATIVE ACTION:
Without official termination of the emergency action, a state of emergency will technically
continue to exist in the Lower Walnut Creek flood control facility.