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ITEM: |
ACTION
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11. |
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Meeting
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May 17, 2021 |
Budgeted: |
N/A |
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From: |
David J.
Stoldt, |
Program/ |
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General
Manager |
Line Item
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Prepared
By: |
Jonathan
Lear |
Cost Estimate: |
N/A |
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General
Counsel Review: N/A |
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Committee
Recommendation: N/A |
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CEQA Compliance: Notice of
Exemption, CEQA, Article 19, Section 15301 (Class 1) ESA Compliance:
Consistent with the September 2001 and February 2009 Conservation Agreements
between the National Marine Fisheries Service and California American Water to minimize take of listed steelhead in the Carmel River and
Consistent with SWRCB WR Order Nos.
95-10, 98-04, 2002-0002, and 2016-0016. |
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SUMMARY: Regulation X of the Monterey Peninsula Water Management District (District) Rules and Regulations requires that a water supply summary forecast report be compiled annually to analyze the status of water supply and demand on the resource system within the District. This report quantifies rainfall, runoff, and storage conditions within the District as of May 1, 2021, and forecasts the amount of water that will be available for use during the upcoming water year from the Monterey Peninsula Water Resource System (MPWRS). The MPWRS supplies water to meet both Cal-Am and non Cal-Am demand on the Peninsula. As Cal-Am constructs water projects to comply with the Cease and Desist order, the company will rely less on water from the MPWRS to meet customer demand and more on the water produced from water projects. Regulation X tests the drought resilience of the of the MPWRS to supply the legal component of water to Cal-Am and non Cal-Am users on the Peninsula for the next 17 months.
Physical Water Availability: As of May 1, 2021, usable water storage within MPWRS totaled 28,380 acre-feet (AF) or 86% of maximum storage capacity. A map of the MPWRS is included as Exhibit 11-A. A breakdown of total storage by reservoir and aquifer is shown in Exhibit 11-B. As shown, usable reservoir storage totals 1,650 AF and usable aquifer storage totals 26,740 AF. For the Seaside Groundwater Basin, the annual Natural Safe Yield is 3,000 Acre Feet and 1,390 Acre Feet remain for WY 2021. In addition, a summary of other water-supply related conditions within the MPWRS – rainfall and runoff recorded at San Clemente Dam and California American Water (Cal-Am) monthly diversions from the Carmel River and Seaside Groundwater Basins relative to limits set by the State Water Resources Control Board (SWRCB) and Court -- are shown in Exhibit 11-C and 11-D.
The amount of carryover storage that is needed to meet the projected water needs within the District for the remainder of Water Year (WY) 2021 and all of WY 2022 is shown in Exhibit 11-E. These projections include the water needs of both Cal-Am customers and non Cal-Am water users within the District who rely on water from the MPWRS. As shown, the projected water demand for the remainder of WY 2021 on the MPWRS is 5,634 AF. Similarly, the projected demand for WY 2022 is 7,896 AF. These projections are based on the maximum annual production amount for the Cal-Am main system from the Carmel River Basin directed by the SWRCB in Order WR 2016-0016 (7,310 AF in WY 2021 and 3,376 in WY 2022), the maximum annual production amount for Cal-Am from the Seaside Groundwater Basin specified by the Court as a result of the Seaside Basin adjudication (1,474 AF in WY 2021 and 1,474 AF in WY 2022), and the maximum production amount for non Cal-Am users in the MPWRS specified in the District’s Water Allocation Program (3,046 AF). As shown in Exhibit 11-E, the total amount of water needed on May 1 to meet the projected water demand for the remainder of WY 2021 and all of WY 2022 is 13,530 AF. Given the current usable storage estimate of 28,380 AF, there is sufficient stored water in the MPWRS to meet the projected water needs from the MPWRS for the remainder of WY 2021 and begin WY 2022 with a full year’s supply in reserve. This is consistent with the District drought protection goal approved by the Board in August 1993.
It should also be noted that this approach is conservative in that it is based entirely on storage and does not include any allowance for surface and subsurface inflows that are expected to occur. Therefore, based on the physical availability of water, no mandatory water demand reductions, i.e., rationing actions, are required at this time. It should be noted, however, that this analysis does not incorporate environmental considerations such as effects on riparian and aquatic resources or regulatory restrictions.
Note that all water users within the District are presently under Stage 1 Water Conservation which prohibits water waste and all non-essential uses of water.
Community Water Demand: For WY 2021, as of May 1, 2021, Cal-Am had produced 3,629 AF of water from its sources in the MPWRS. This amount of production is 222 AF under the year-to-date at month-end production target that had been set for Cal-Am based on SWRCB Order WR 2016-0016 and the Seaside Groundwater Basin adjudication decision.
RECOMMENDATION: The Board should receive the water supply forecast for the May 1, 2021 through September 30, 2022 period and adopt Resolution 2021-04 to amend Rationing Table (XV-4).
IMPACTS ON STAFF/RESOURCES: District staff currently tracks and reports on water production and water supply conditions on a monthly basis; no additional impacts are anticipated related to this item.
EXHIBITS
11-A Map of the Monterey Peninsula Water Resources System (MPWRS)
11-B Water Storage Conditions, MPWRS
11-C MPWMD Water Supply Status -- May 1, 2021
11-D California American Water Production vs. CDO and Adjudication to Date: Water Year 2021
11-E Derivation of Water Rationing Triggers for the MPWRS for the Remainder of 2021 Water Year and all of 2022Water Year
11-F Draft
Resolution 2021-04
U:\staff\Boardpacket\2021\20210517\Public Hearings\11\Item-11.docx