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: July 18 , 2008
Head of Old River Barrier (HORB):
The spring HOR barrier work will not be installed this year due to a court decision by US District Court Judge Wanger that prohibited the installation of the spring barrier to increase protections for delta smelt. This is an interim decision that effects the 2008 season only. The fall HORB is not effected.
Agricultural Barriers (Old River near Tracy [ORT], Middle River [MR], Grant Line Canal [GLC]):
All the agricultural barriers are operating normally, with their culvert flap gates opening and closing tidally. However, three culverts are tied open on the ORT barrier for water quality purposes.
A look at CDEC data shows water levels have risen steadily since mid-last week however will be gradually lowering as the neap tide cycle peaks next week. Even with the weak neap tide cycle, water levels have been well above the trigger levels (0.0 feet MSL at both ORT and GLC barriers, 0.3 feet MSL at the MR barrier) and should remain above through next week.
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Mark A. Holderman, P.E.
Chief, Temporary Barriers Project and
California Department of Water Resources
Phone: (916) 653-7429 FAX: (916) 653-6077
Cell/Pager: (916) 601-6036 E-Mail: firstname.lastname@example.org