RES 87212 - Laserfiche WebLink

Folsom Dam was completed in 1955 and provides a total storage capacity of 1,OlD,POD AF and a safe yield of approximately 590,000 AF. To date, the Bureau has executed only two contracts for the delivery of water via the Fol som-So,sth canal--EBMUD's contract for 15D,O00 AFA and a second contract with the Sacramento Municipal Utility District for delivery of up 75,0OO AFA for the Rancho Seco nuclear power plant. At present, most water that is stored in Folsom Reservoir is released to the lower American River and substantially enhances the summer flow. As shown on Figure 2 above, the average summer flow is 1,500 cfs. The Bureau intends to sign contracts for the delivery of up to 590,000 AFA of water. All or DOrti,~nS of this water could be diverted to the Polsom-South canal. This would the average summer flow to about 1,00O cfs. In 1955, the Board adopted a decision (D-8.q3) approving the Bureau's a~prt~i~.- tion of water at Folsom Dam. D-893 requires that the Bureau provide a flow in the lower American River during the summer period of 250 cfs (i.e., average flow that existing in the summer months prior to construction of Folsom Dam). Thus, the Bureau could divert additional water through the Folsom-So!jt~ Canal and reduce the summer flow in the river to 250 cfs. In 1970, the State Board adopted a decision (D-1400) which relates to the operation of Auburn Dam. The decision would require instream flows of R00 o 1500 cfs during summer months. Since Auburn dan has not been constructed, _ however, the Bureau is only obligated to maintain the minimum instream flow 250 cfs as specified in D-8.q3. In addition, future inbasin developne_nt coupled with the possible diversion water by the Bureau to the Folsom-South Canal will reduce the level of flo~J in