ITEM:

INFORMATION ITEMS/STAFF REPORT

 

31.

MONTHLY WATER SUPPLY STATUS REPORT

 

Meeting Date:
December 13, 2010

Budgeted: 

N/A

 

From:

Darby Fuerst,

Program/

N/A

 

General Manager

Line Item No.:

 

 

 

Prepared By:

Jonathan Lear

Cost Estimate:

N/A

 

General Counsel Review:  N/A

Committee Recommendation:  N/A

CEQA Compliance:  N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Exhibit 31-A shows the water supply status for the Monterey Peninsula Water Resources System (MPWRS) as of December 1, 2010.  This system includes the surface water resources in the Carmel River Basin, the groundwater resources in the Carmel Valley Alluvial Aquifer and the Seaside Groundwater Basin.  Exhibit 31-B focuses on four factors: rainfall, runoff, storage, and steelhead.  The report is limited to the water year that began October 1, 2010 and will end September 30, 2011 (WY 2011).  The rainfall and streamflow values are based on measurements in the upper Carmel River Basin at San Clemente Dam.  This site was selected because of its location above storage facilities and the availability of long-term rainfall and runoff records.

 

Water Supply Status:  As shown, rainfall during November 2010 totaled 2.26 inches and brings the cumulative rainfall total for WY 2011 to 2.88 inches, which is 100% of the long-term average through November of 2.88 inches.  Estimated unimpaired runoff during November 2010 totaled 1,072 acre-feet (AF) and brings the cumulative runoff total for WY 2011 to 1,706 AF, which is 92% of the long-term average through November of 1,864 AF.  Usable storage, which includes surface and groundwater, was 29,970 AF, or 110% of the long-term average through November of 27,300 AF.  This storage equates to 80% of system capacity.  In addition, 0 adult steelhead were counted in the fish ladder at San Clemente Dam for WY 2011 through November; fish rescues have yet to begin.

 

Production Compliance:  Under State Water Resources Control Board (SWRCB) Cease and Desist Order No. 2009-0060, California American Water (Cal-Am) is allowed to produce no more than 10,429 AF of water from the Carmel River in WY 2011.  In addition, under the Seaside Basin Decision, Cal-Am is allowed to produce 3,202 AF of water from the Coastal Subareas and 246 AF from the Laguna Seca Subarea of the Seaside Groundwater Basin in WY 2011, as modified by the Seaside Basin Watermaster in December 2010.  Altogether, Cal-Am is currently allowed to produce 13,631 AF from Carmel River and Seaside Coastal sources for customers in its main Monterey system and 246 AF from the Laguna Seca Subarea for customers in its Laguna Seca subsystems, i.e., Ryan Ranch, Hidden Hills, and Bishop Systems (not adjusted for ASR recovery or Sand City desalination plant production).  For WY 2011 through November, Cal-Am has produced 2,021 AF from the Carmel River and Seaside basins for customer use.  This water production is 179 AF or approximately 8% less than the target specified for Cal-Am’s production from the MPWRS for WY 2011 through November.  A monthly breakdown of Cal-Am’s production from the Carmel River and the Seaside Groundwater Basin Subareas for WY 2011 through November is included as Exhibit 31-B.  Cal-Am’s production from the Carmel River Basin is reduced for diversions that are made for injection into the Seaside Basin; Cal-Am’s “native” production from the Seaside Basin is reduced for the recovery of injected water. For WY 2011 through November, 0 AF of groundwater have been diverted from the Carmel River aquifer for injection into the Seaside Groundwater Basin; 812 AF have been recovered for customer use.

 

EXHIBITS

31-A    Water Supply Status: December 1, 2010

31-B    Monthly Cal-Am Diversions from Carmel River and Seaside Groundwater Basins:  Water Year 2011                                        U:\staff\word\boardpacket\2010\20101213\InfoItems\31\item31.doc