EXHIBIT B
Monterey Peninsula Water Management District
Quarterly Water Supply Strategy Report: January - March 2001December 11, 2000
1. Management ObjectivesThe District desires to maximize the long-term production potential and protect the environmental quality of the Seaside and Carmel Valley basins. To accomplish these goals, a water supply strategy and budget for production within the Cal-Am water distribution system is reviewed quarterly to determine the optimal strategy for operations, given the current hydrologic and system conditions.
2. Quarterly Water Supply Strategy: January - March 2001
On December 5, 2000, staff from the District, Cal-Am, CDFG, and the NMFS discussed the proposed water supply strategy and related topics for the remainder of December 2000 and the January-March 2001 period. Currently, storage in Los Padres Reservoir is approximately 1,100 acre-feet (AF), or 520 AF greater than was anticipated for the 2000 Memorandum of Agreement. Because of this and the continued construction of Cal-Am's Clearwell Project, the parties agreed that Cal-Am would maintain a maximum diversion rate of 1.0 cfs and a minimum release of 10 cfs in January 2001, according to the schedule (Table 1). In past years, the releases and diversions were increased as rainfall and runoff occur during this period. For this analysis, the maximum diversion rate was set at 1.0 cfs in January to avoid impacts on juvenile steelhead habitat in the reach immediately downstream of San Clemente Dam. During February 2001, the proposed budget allows Cal-Am to divert up to 1.0 cfs through the Filter Plant and to operate Scarlett No. 8, and Laureles Wells Nos. 5 and 6. During March 2001, the proposed budget allows Cal-Am to divert up to 12 cfs, via direct diversion from San Clemente Dam to the Carmel Valley Filter Plant, assuming that the Clearwell Project will be completed by that time. The parties agreed that if Cal-Am has not completed the Clearwell Project by March 2001 or if the quality of raw water limits production at the Begonia Treatment Plant, then Cal-Am wells upstream of Robinson Canyon Road Bridge could be used to meet demand. The operation of Cal-Am Wells in the upper Carmel Valley or the direct diversion of 12 cfs during the February-March period is based on the assumption that inflows equal median levels of 173 cfs in February and 187 cfs in March.
It should be noted that the flow schedule shown in Table 1 represents guidelines for distributing the initial 11.0 cfs of reservoir inflow. The actual distribution of flow below San Clemente Dam will depend on the timing and intensity of specific flow events. It should also be noted that the guidelines in Table 1 are intended for use during steelhead rearing periods, not during spawning periods. Following the first migration of adult steelhead into the river, revised guidelines will be provided for review and implementation. In addition, Cal-Am is expected to complete its Clearwell Project by March 2001. Pending adequate streamflow during March 2001, Cal-Am will want to maintain diversion rates higher than 1.0 cfs to test the Clearwell facility, provide high quality water throughout their distribution system and minimize pumping costs.
Based on the runoff that occurred during the October-November 2000 period and a comparison of runoff during the 2000 Water Year (WY) with the long-term historical record, it was agreed that the projections for the upcoming quarter should be based on the median historical flows. Based on this technique, staff projected monthly unimpaired inflows at San Clemente Dam of 2,100, 5,700, 9,600 and 10,500 AF for the months of December 2000, and January, February, and March 2001, respectively.
Table 2 shows a monthly breakdown of the recommended diversion and release schedule under the projected inflow condition. Table 2 also shows expected inflows, outflows, and storage volumes at Los Padres and San Clemente Reservoirs for the December 2000-March 2001 period. The total runoff for the projected period is equivalent to the sum of the long-term median monthly runoff at San Clemente Dam. Under the existing 2000 Memorandum of Agreement, Cal-Am is allowed to divert a maximum of 3 cfs during December 2000. However, due to water quality constraints and construction of the Clearwell Project, it is assumed that Cal-Am would maintain maximum diversion rates of 1.0 cubic feet per second (cfs) from San Clemente Reservoir during December 2000, January 2001 and February 2001, and a maximum diversion rate of 12.0 cfs during March 2001.
Table 1
QUARTERLY WATER SUPPLY STRATEGY AND BUDGET:
JANUARY 1 -31, 2001
FLOW RELEASE AND DIVERSION SCHEDULE FOR
SAN CLEMENTE RESERVOIR UNDER NORMAL FLOW CONDITIONS 3
(All Values are in Cubic Feet Per Second)
RESERVOIR
INFLOWMINIMUM
RELEASEFILTER PLANT
DIVERSION< = 11.0 10.0 1.0 >11.0 > 10.0 1.0 Notes:
1. This schedule assumes that both Los Padres and San Clemente Reservoirs are full and ignores reservoir evaporation. In addition, it is assumed that the release at San Clemente Reservoir includes leakage. Reservoir releases will be monitored at the downstream Sleepy Hollow Weir.
2. This schedule is designed to avoid impacts on steelhead rearing, prior to the occurrence of attraction flows at the Carmel River Lagoon. Following an attraction event, a revised schedule may need to be developed and used to provide adequate flows for adult spawning and egg incubation between San Clemente Dam and the Narrows and juvenile rearing in the lower river below the Narrows.
3. During normal years the diversion rate at Carmel Valley Filter Plant would be set to a maximum of 16 cfs. Production at the CVFP is constrained by construction of the Clearwell Project and turbidity of raw water diverted at San Clemente Dam. Due to these constraints, the maximum diversion rate has been reduced from 16 to 1.0 cfs during January.