EXHIBIT 10-B
Quarterly Water Supply Strategy and
Budget Report
California American Water
Main Water Distribution System: October –
December 2008
1. Management
Objectives
The
Monterey Peninsula Water Management District (District) desires to maximize the
long-term production potential and protect the environmental quality of the Carmel River
and Seaside Groundwater Basins. In addition, the District desires to maximize
the amount of water that can be diverted from the Carmel
River Basin and injected into the Seaside Groundwater
Basin while complying with the
instream flow requirements recommended by the National Marine Fisheries Service
(NMFS) to protect the Carmel
River steelhead
population. To accomplish these goals, a
water supply strategy and budget for production within the California American
Water (CAW) main 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: October - December 2008
On
September 3, 2008, staff from the District, CAW, CDFG, and NMFS met and
discussed the proposed water supply strategy and related topics for the
remainder of September 2008 and the October-December 2008 period. Currently, flow in the Carmel River
is fully regulated, with CAW’s San Clemente Reservoir being drawn down to
comply with the Division of Safety of Dams’ requirements and Los Padres
Reservoir below its spillway elevation.
Rainfall during Water Year 2008 to date at San Clemente Dam in the upper
watershed has totaled 19.6 inches or 92% of the long-term average at this site. More significantly, only 0.54 inches of rain
have been recorded at the San Clemente Dam site between March and August
2008. This total is the third lowest
during the 87-year period of record (WY 1922 – WY 2008) and is less than 10% of
the average amount of rainfall expected between March and August (5.60
inches). At this time, based primarily
on the lack of rainfall during the March through August period, inflow
conditions in the Carmel River Basin are projected to be “critically-dry” for
the beginning of the WY 2009.
Carmel River
Basin Given these conditions,
it was agreed that CAW would:
1.
divert no surface water from its San Clemente Reservoir
during the October through December 2008 period,
2.
divert approximately 30 AF of groundwater from its wells in
the Upper Carmel Valley
per month during the October through December 2008 period, when low-flow
conditions remain in effect, and
3.
divert in a downstream-to-upstream sequence, as needed,
approximately 860, 630, and 590 AF of groundwater from its wells in the Lower Carmel
Valley during October,
November, and December 2008, respectively.
Seaside Groundwater
Basin
It was also agreed that CAW would:
1.
pump
450, 400, and 350 AF of naturally-occurring water from the Coastal Subareas of
the Seaside Basin in October, November, and December
2008, respectively.
Phase 1 Aquifer Storage
and Recovery (ASR) Project Lastly, it was agreed that:
1.
CAW would divert no water from the Carmel
River Basin during the October through
December 2008 period for injection and storage in the Seaside Groundwater
Basin, and
2.
CAW would not recover any artificially-recharged water from
the Seaside Basin for CAW customer use during the
October through December 2008 period.
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