ITEM:

CONSENT CALENDAR

 

7.

RECEIVE AND FILE DISTRICT-WIDE ANNUAL WATER PRODUCTION SUMMARY REPORT FOR WATER YEAR 2006

 

Meeting Date:

March 19, 2006

Budgeted:

N/A

 

From:

David A. Berger,

Program/

Hydrologic Monitoring

 

General Manager

Line Item No.:†††† N/A

 

Prepared By:

Thomas Lindberg

Cost Estimate:

N/A

 

General Counsel Approval:N/A

Committee Recommendation: N/A

CEQA Compliance:N/A

 

SUMMARY: Staff has prepared a draft Water Production Summary Report of all registered production sources, i.e., wells and surface water diversions, within the Monterey Peninsula Water Management District (District) for Water Year 2006 (WY 2006).WY 2006 covers the 12-month period from October 1, 2005 through September 30, 2006.Preliminary computations indicate that 18,788 acre-feet (AF) of ground water were produced from registered wells in the District during WY 2006.In addition, 40 AF of surface water were diverted by private users.Combined surface and ground water production from all sources within the District in WY 2006 is calculated at 18,828 AF.This report presents comparisons of California American Water (CAW) and non CAW production in WY 2006 and WY 2005, and compares WY 2006 production with the Districtís current water allocation program limits.

RECOMMENDATION:This report is for informational purposes only.The Board should review the draft summary report and provide staff with any comments or questions.Staff will complete and file the final report, incorporating any late revisions, if this item is approved with the Consent Calendar.

 

BACKGROUND:District Rules and Regulations require well owners and operators to submit annual water production information to the District.Well production is calculated by either the Land Use or Water Meter reporting method and is described below.

 

Number of Wells Ė Presently, there are 1,084 registered wells in the District.Of this total, 699 wells are active, and 299 wells are inactive.A well is considered active if it has produced any water in the last reporting period, i.e., WY 2006.Information on the remaining 86 registered wells is not available because reporting forms were not returned by owners of those wells.

 

Data Adjustments Ė For certain wells, staff estimated actual production to more accurately quantify water produced during WY 2006.Data adjustments were required to estimate water production from 74 wells that had either incomplete water meter records or reported water production for a period longer than the water year. Production from metered wells with incomplete records was estimated by using generalized non CAW monthly distribution factors developed by staff.In 26 cases, production records were incomplete because reported meter readings covered a period shorter than WY 2006.In eight other cases, production records were incomplete because meters were replaced or repaired after the start of WY 2006.The application of monthly distribution factors allowed staff to reasonably account for the percentage of production that was not reported for each of these wells, which was then added to the annual total for these wells.

 

Similarly, there were 48 cases in which production was reported for a period longer than WY 2006.Estimates of the amounts that were over-reported were made based on the monthly distribution factors.These amounts were then subtracted from the reported totals.In three cases, production from wells with non-functioning water meters during WY 2006 was estimated based on historical production reports for these wells.

 

District-wide Production - Preliminary production values for WY 2006 are summarized by reporting method (Water Meter or Land Use), reporting status (active, inactive, or not reporting), and source area in Exhibit 7-A.For comparison, production values for WY 2005 are presented in Exhibit 7-B.The various source areas are shown in Exhibit 7-C.The volume of water produced from each source area is shown in Exhibit 7-D.The number of active non CAW wells and the volume of water produced by each reporting method in WY 2006 and WY 2005 are compared in Exhibit 7-E.

 

District-wide, total water production increased by 124 AF (0.7%) in WY 2006 compared to WY 2005.Specifically, ground water withdrawals increased by 133 AF (0.7%), while surface diversions decreased by 9 AF (18.0%) in WY 2006.No surface water has been diverted within the CAW main system since WY 2003 because of seismic safety and sedimentation concerns at San Clemente Dam and Reservoir.WY 2004 marked the first year since 1921, when San Clemente Dam was completed, that CAW or its predecessor did not divert surface water from San Clemente Reservoir.

††

Monterey Peninsula Water Resources System (MPWRS) Ė The MPWRS includes surface water in the Carmel River and its tributaries, and ground water in the Carmel Valley alluvial aquifer and coastal subareas of the Seaside Ground Water Basin.Overall water production within the MPWRS in WY 2006 increased by 180 AF (1.1%) compared to WY 2005.Specifically, CAW production in WY 2006 increased by 179 AF (1.3%), and non CAW production increased by one AF (0.0%) relative to reported production in WY 2005.CAW production from Carmel Valley decreased 83 AF (0.7%), and CAW production from the coastal areas of the Seaside Basin increased by 262 AF (8.7%).Non CAW production from Carmel Valley decreased by less than one AF (0.0%) compared to WY 2005, and non CAW production from the coastal areas of the Seaside Basin decreased by seven AF (0.8%).

 

It is important to note that of the 10,954 AF of CAW production from Carmel Valley, 411 AF was produced and delivered to the Districtís Santa Margarita Test Injection Well (SMTIW) No. 1 for injection into the Seaside Basin.No recovered water from the Districtís SMTIW No. 1 was delivered to CAW in WY 2006. For reference, since the Districtís Seaside Injection/Recovery Program began testing in WY 1998, a total of 1,863 AF have been injected into the Seaside Basin and 1,139 AF have been recovered or produced from the SMTIW No.1 for delivery into the CAW System. ††

 

Water Allocation Program Ė With respect to the Districtís Water Allocation Program limits, CAW production from the MPWRS in WY 2006 was 14,218 acre-feet, or 3,423 acre-feet (19.4%) less than the CAW production limit of 17,641 acre-feet that was established with the adoption of Ordinance No. 87 in 1997.Non CAW production within the MPWRS in WY 2006 was 2,740 acre-feet, or 306 acre-feet (10.0%) less than the non CAW production limit of 3,046 acre-feet established by Ordinance No. 87.Combined production from CAW and non CAW sources within the MPWRS was 16,958 acre-feet in WY 2006, which is 3,729 acre-feet (18.0%) less than the 20,687 acre-feet production limit set for the MPWRS as part of the Districtís Water Allocation Program.A comparison of reported water production from the MPWRS in WY 2006 relative to the Districtís Water Allocation limits is presented in Exhibit 7-F.

 

Lastly, it should be noted that 99% of the ground water production within the District was reported by the water meter method in WY 2006.In addition, over 90% of registered well owners in the District reported annual production for their wells in WY 2006.

 

EXHIBITS

7-A††††† District-wide Water Production Summary for Water Year 2006

7-B††††† District-wide Water Production Summary for Water Year 2005

7-C†††† MPWMD Water Production Source Areas

7-D††††† Water Production by Source Area for Water Year 2006

7-E††††† District-wide Production by Reporting Method for non CAW Wells in WY 2006 and

††††††††††† WY 2005

7-F†††††† Comparison of Reported Production to Production Limits within the MPWRS in

WY 2006

 

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