Northern Delta-Mendota Region Management Committee

May 4, 2026

Cost-share debate on model calibration (options shown at ~$500K) continued; members discussed keeping the 1/7 cost share and/or consolidating smaller groups' seats. The Committee voted to support pursuing a WaterSMART grant (up to $400K; 50% match) if cost share is agreed. PRP reminders: metering due Jan 2026; aquifer-specific reporting required; 2026 lower-aquifer target: 1,805 AF.

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March 4, 2026

Committee voiced support for proceeding with groundwater model calibration in 2026 rather than waiting, a perspective Vice Chair Lucchesi will bring to the JPA Board meeting the following Monday. Significant basin‑wide pumping data discrepancies were flagged, with a push for more consistent estimation methods across GSAs. Staff also noted the State Water Board is scheduled April 7 to act on returning the subbasin's GSP to DWR, increasing pressure to have defensible data and tools in place.

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January 7, 2026

The Committee recommended member GSAs approve a Special Projects Agreement establishing governance structure under the new Joint Powers Authority, set to take effect March 1, 2026, maintaining current cost-sharing arrangements. The SGMA Round 1 Grant deadline requires all deliverables submitted by January 23, 2026, with final grant closeout in early March. JPA formation awaits one remaining member agency signature before holding its first organizational meeting.

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November 5, 2025

The committee advanced a special projects agreement to maintain continuity under the new Joint Powers Authority structure while addressing multiple water quality exceedances for TDS and nitrate that require investigation protocols. With the SGMA grant deadline approaching December 31st, agencies must complete remaining deliverables and submit final materials by November 28th to ensure compliance and project completion.

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October 1, 2025

The committee unanimously supported a water rights petition that could provide 11,000 acre-feet of additional surface water annually to reduce regional groundwater pumping. Members were reminded that all SGMA Round 1 grant construction projects must be completed by end of 2025, with draft invoices due in March 2026. The committee confirmed it will maintain its current operational structure when transitioning to a new joint powers authority, ensuring continuity in regional water management ...

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