The following report on the Temporary Barriers Project is for your information and action, as appropriate.  This report will be transmitted whenever changes occur to the operation of the barriers, and as a result of modeling and/or field monitoring of water levels in the south Delta.

STATUS AS OF:   March 17, 2015


Agricultural Barriers (Middle River [MR], Old River near Tracy [ORT], Grant Line Canal [GLC]):

The installation of the Old River near Tracy barrier started on March 16, 2015. Work will continue on the construction of the ORT with closure anticipated by April 6, 2015. All nine flap gates will be tied open until the Head of Old River barrier closes on April 8. Construction will continue after the closure on dressing up the barrier and putting the final touches until April 11, 2015.

The installation of the Middle River barrier will start on March 30, 2015and the closure is anticipated by April 03, 2015. The flap gates upon closure will be tied open until the Head of Old River barriers closes on April 8.

The construction of the Grant Line Canal barrier will start on April 2, 2015 with the partial closure anticipated by April 14, 2015. As in the past, full closure of the Grant Line Canal will occur in early June after the approval from the fishery agencies.

Head of Old River Barrier [HORB]:

The construction on the Spring Head of Old River barrier started on March 16, 2015. The closure is anticipated to take place on April 8, 2015 two days after the closure of the Old River near Tracy barrier. Construction will continue on completing the clay notch which is expected to be done by April 13, 2015.

Environmental Permits Compliance Reporting:

Environmental staff conducted preconstruction surveys as required by State and Federal permits and Biological Opinions. An Environmental Tailgate Session was held at the Old River Tracy Barrier site to inform construction staff of the permit requirements, to give a general overview of sensitive species found at or near the construction sites and to instruct personnel on proper procedures to follow when sensitive species are encountered on the construction site. Additionally, an Environmental Compliance Monitor is on-site for all construction work, an approved Swainson's Hawk and nesting raptor monitor is conducting regular observations of nesting and territory sites and a water quality monitor is monitoring settleable solids and turbidity.

Water Levels and Water Quality Notifications:

DWR will continue to monitor the water quality and water levels before, during and after the installation of the temporary barriers.


Computer modeling will begin first week of April.

Real-time south Delta water level data is available on CDEC at the URL below: 

These weekly updates are also available for your information on our website:

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Thank you!
Jacob McQuirk, P.E.
DWR|Bay-Delta Office
Temporary Barriers and Lower San Joaquin
1416 9th St., Room 215-23
Sacramento, CA 95814
office:   916-653-9883
Fax:      916-653-6077


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