HomeMy WebLinkAboutMINUTES - 10062009 - C.11RECOMMENDATION(S):
APPROVE the Installation of Stream Flow Gauge on Marsh Creek Project (Clayton) and
FIND the project is a California Environmental Quality Act (CEQA), Class 6 Categorical
Exemption, pursuant to Section 15306 of the CEQA Guidelines, and
DIRECT the Director of Conservation and Development to file a Notice of Exemption with
the County Clerk, and
AUTHORIZE the Chief Engineer to arrange for payment of a $25 fee to the Department of
Conservation and Development for processing, and a $50 fee to the County Clerk for filing
the Notice of Exemption, and
AUTHORIZE the Public Works Director, or designee, to advertise the project.
FISCAL IMPACT:
The estimated project cost is $23,567.68. This project is funded by FCD Stream Gauge and
APPROVE OTHER
RECOMMENDATION OF CNTY ADMINISTRATOR RECOMMENDATION OF BOARD COMMITTEE
Action of Board On: 10/06/2009 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: Kimani Birden (925)
313-2190
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: October 6, 2009
David J. Twa, County Administrator and Clerk of the Board of Supervisors
By: EMY L. SHARP, Deputy
cc: Emma Kuevor, Affirmative Action Officer, Stephen Ybarra, Auditor Controller, Patricia Hofherr, DCD, Karen Fernandez, Finance, Scott McQuarrie,
Flood Control, Marlon Epps, Engineering Services
C.11
To:Contra Costa County Flood Control District Board of Supervisors
From:Julia R. Bueren, Public Works Director/Chief Engineer
Date:October 6, 2009
Contra
Costa
County
Subject:APPROVE the Installation of Stream Flow Gauge on Marsh Creek project, and make related findings under
CEQA. CP#09-69 Project No.: 7524-6D8144
Equipment Purchase and Installation Funds (100%).
BACKGROUND:
The project consists of installation of a stream flow gauge on Marsh Creek. The gauge
will be used to analyze flood models and possibly correlate them with mercury levels in
Marsh Creek associated with the mercury mine located 1.25 miles upstream from the
proposed stream flow gauge location. The work consists of the installation of a small
sensor (1' long by 1.5" inch diameter) anchored to the bed of the stream channel. The
sensor would be attached to a wire that is encased in a small (2" diameter) steel pipe
which is anchored to bedrock in the stream channel. The pipe will protect the wire from
the creek flows. In order to calibrate the sensor (to ensure it is working properly), staff
gauges that identify the depth of water in the creek will also be installed. The concrete
footings associated with the staff gauges will result in a tiny amount of fill in the bed of
the channel (a total of 2 ft2 or 0.000046 acre). The fill associated with the steel pipe and
sensor will also be tiny (1.69 ft² or 0.000039 acre). Total fill created by the completed
stream gauge system will be approximately 0.0001 acre. All of the work will be done
completely by hand (one man with a shovel) and is planned to occur during the dry
season when the creek is dry, so no impacts to wildlife will occur. In order to minimize
damage to any nearby trees, any roots exposed during excavation will be cut cleanly and
tree branches will be trimmed. No tree removal will be necessary.
CONSEQUENCE OF NEGATIVE ACTION:
Delay in approving the project will result in delay of design, construction, mercury mine
mitigation and may jeopardize funding.
ATTACHMENTS
S:\ENG Services\BO Installation of stream flow Marsh Creek project.pdf