WSP12980 - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I Based upon the 1991 preliminary planning study, the construction of reservoirs along the All- American Canal is feasible although it would be an extensive project requiring further evaluation. A two to four year time frame would be needed to allow for the additional planning as well as design and construction. A negative impact of this project would be its reduction of flows to Mexico. While not "officially" entitled to these waters by agreement or treaty, Mexico may have become somewhat reliant on these excess flows and might object to the construction of these reservoirs. Also, if in the future upstream Colorado River water users improve their systems, the conservation potential of this project will decrease and lose a portion of its appeal. _ IV.A.4 Additional Interceptors Lateral interceptors are designed to collect and store water that prior to their construction would have spilled into drains as lateral discharge. These interceptors generally run perpendicular to the laterals they serve, and discharge into an interceptor reservoir or existing District regulating reservoir where the captured flows can later be put to a beneficial use by downstream deliveries. Additional conservation is obtained through the added flexibility that the interceptors allow the water user in terms of delivery duration and adjustments (cut-backs and shutdowns). To date, one interceptor is in place and two more are in various phases of design and construction. The Plum-Oasis Lateral Interceptor began operation in 1992, and as a part of the nD/MWD conservation program went through a verification process that calculated its 1995 annual conservation savings at 6,420 acre-feet. (Projected 1995 Water Conservation Savings with Summaries qfSulJPorting Documentation, CVC, March 1995.) A 1993 reconnaissance level study prioritized the construction of eighteen lateral interceptor systems, in addition to the completed Plum-Oasis system, throughout the District's service area. By 1996, two of these systems will be in place, leaving sixteen interceptors still to be developed. For each of these proposed systems, a Limited Flexibility Interceptor (LFI) and a Multi-Purpose Interceptor (MPI) concepts were proposed. "The LFI is a minimal service system that only collects operational discharges and a nominal amount of ending flows (partial return of a water Draft: Subject To Revision 12/21/95 38