Alternative Periodic Evaluation

7-024.01 BORREGO SPRINGS

Base Information

06/24/2026

08/13/2026

10/27/2026
Public Comments 

Samantha Adams (Borrego Springs Watermaster)
23692 Birtcher Drive
1 (949) 238-069819492380698
borregospringsWM@westyost.com

Borrego Springs Watermaster

Notice Date: 04/24/2026
Public Hearing Date: 06/24/2026
The attached proof of adoption is a letter signed by the Board Chairperson and Executive Director of the Borrego Springs Watermaster verifying that the Borrego Springs Watermaster Board of Directors approved the following documents for the Borrego Springs Subbasin (Basin No. 7-024.01) at its June 24, 2026 Special Board Meeting: • 5-Year Assessment Report of the Judgment and Groundwater Management Plan for the Borrego Springs Subbasin (5-Year Assessment Report) • 2026 Update to the Groundwater Management Plan for the Borrego Springs Subbasin (2026 GMP Update) As noted in the letter, the June 24th Board meeting minutes documenting the Board’s approval of these reports will be approved by the Board at its August 19, 2026 Board meeting. Once approved, the meeting minutes will be submitted to the DWR as additional proof of the Board’s adoption of the Alternative Periodic Evaluation and 2026 GMP Update.

Plan Contents

Alternative Periodic Evaluation (120MB)
Elements of the Periodic Evaluation

Supporting Information

File Name GSP Regulation Element(s) Uploaded Date & Time
Borrego Springs 2026 GMP Clean-No Redline.pdf (189.1MB) S354.4(a) 06/24/2026 3:24:44 PM
Alternative Plan Resubmission - Borrego Springs Judgment with 2026 GMP.pdf (193.3MB) S354.4(a) 06/24/2026 3:22:03 PM

References

Title Publication Name Publish Date Author(s) File Name or URL
Borrego Water District v. All Persons Who Claim a Right to Extract Groundwater in the Borrego Valley Groundwater Subbasin No. 7.024-01 (Judgment) Superior Court of California, County of Orange 2021-04-08 Borrego Water District
Borrego Water District v. All Persons Who Claim a Right to Extract Groundwater in the Borrego Valley Groundwater Subbasin No. 7.024-01 (Judgment Findings and Order) Superior Court of California, County of Orange 2021-04-08 Borrego Water District
Letter to the California Department of Water Resources Re: Borrego Water District GSA Withdrawal 2021-06-15 Borrego Water District
Groundwater Quality Risk Assessment Update 2023-10-17 Borrego Water District
Data on water wells in Borrego, Ocotillo, San Felipe, and Vallecito Valley areas, Eastern San Diego County, California U.S. Geological Survey 1954-10-31 Burnham, W.L.
Groundwater Sustainability Plan Implementation: A Guide to Annual Reports, Periodic Evaluations, & Plan Amendments DWR 2023-10-01 California Department of Water Resources
Letter to the Borrego Springs Watermaster Re: Assessment of Alternative Groundwater Sustainability Plan DWR 2025-02-25 DWR
SGMA Data Viewer 2026-03-09 DWR
Daily Evapotranspiration Data for CIMIS Station 207 - 2008 through 2025 CIMIS 2012-12-17 CIMIS
Update to USGS Borrego Valley Hydrologic Model for the Borrego Valley GSA (draft final) 2019-07-01 Dudek
Groundwater Management Plan for the Borrego Springs Subbasin 2021-04-08 Dudek
Hydrogeology, hydrologic effects of development, and simulation of groundwater flow in the Borrego Valley, San Diego County, California U.S. Geological Survey 2015-11-24 Faunt, C.C., Stamos, C.L., Flint, L.E., Wright, M.T., Burgess, M.K., Sneed, Michelle, Brandt, Justin, Martin, Peter, and Coes, A.L.
California Basin Characterization Model USGS Data Release 2014-01-01 Flint, L.E. and Flint, A.L.
Letter to the California Department of Water Resources Re: Borrego Water District GSA Withdrawal 2021-06-15 Borrego Water District
Groundwater Quality Risk Assessment Update 2023-10-17 Borrego Water District
One-Water Hydrologic Flow Model (MODFLOW-OWHM) U.S. Geological Survey 2014-10-31 Hanson, R.T., Boyce, S.E., Schmid, Wolfgang, Hughes, J.D., Mehl, S.M., Leake, S.A., Maddock, Thomas, III, and Niswonger, R.G.
Biological restoration of fallowed lands in Borrego Valley, California: Recommended retired farmland rehabilitation strategies Borrego Springs Watermaster 2025-03-31 Land IQ and UCI
Water resources of Borrego Valley and vicinity, California; Phase 1 U.S. Geological Survey 1982-11-01 Moyle, W.R.
Climate Data Online—Borrego Desert Park, California Daily Summary Observations NOAA 2026-01-01 NOAA
The Farm Process Version 2 (FMP2) for MODFLOW-2005 U.S. Geological Survey 2009-01-01 Schmid, Wolfgang, and Hanson, R.T
TAC Recommendation Report: Redetermination of the 2025 Sustainable Yield 2024-10-29 Technical Advisory Committee
GDE Identification and Monitoring Program Report and Recommendations 2025-05-15 UCI, Tubb Canyon Desert Conservancy, and San Diego Natural History Museum
Network Monitoring 2026-05-28 UNAVCO
Extension of the Borrego Valley Hydrologic Model through Water Year 2021 2022-09-21 West Yost
Groundwater Monitoring Plan for the Borrego Springs Subbasin 2023-04-11 West Yost
Review Results of Task 1 and Task 2 to Redetermine the Sustainable Yield by 2025 2023-05-31 West Yost
Task 2 to Redetermine the Sustainable Yield by 2025 – Update Water-Use Factors in the Farm Process 2023-08-22 West Yost
Task 3 to Redetermine the Sustainable Yield by 2025—Correct Errors Identified in the 2021 BVHM 2023-12-11 West Yost
Task 4 – Model Calibration and Redetermination of the 2025 Sustainable Yield 2024-10-29 West Yost
Use of the 2022 BVHM to Evaluate Sustainability of Future Pumping in the Borrego Springs Subbasin 2026-03-20 West Yost
Expansion of the Borrego Springs Subbasin Groundwater Monitoring Program and Conversion of Inactive/Abandoned Wells 2025-03-31 West Yost

Monitoring Network Module

SGMA Wells


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