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 26 , 2007Head of
The Spring HOR barrier has been completely removed. The HOR barrier will be re-installed in the fall upon request by DFG.
Agricultural Barriers (Old River near Tracy [ORT], Middle River [MR], Grant Line Canal [GLC]):
All agricultural barriers are in place but only the GLC and MR barriers have been operating normally this week. Four culvert flap gates on the ORT barrier have been tied open to help improve circulation and water quality on Old River. We may untie the flap gates, on all or some of the nine culverts at the ORT barrier, if water level conditions deteriorate during the next neap tide cycle.
Modeling was done earlier this week it included the change to tie open four of the nine ORT barrier culverts flap gates. The modeling shows water levels remaining above the level of concern at the ORT, and GLC monitoring stations (0.0 feet MSL) and the level of concern at the MR station (0.3 feet MSL)
These weekly updates are also available for your information on our website:
If you know of anyone else that should be receiving this update, please let me know by email, and I'll add them to the mailing list. Thanks!
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: email@example.com