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Mohave supervisors postpone resolution on Hualapai Valley groundwater until updated USGS/ADWR data is presented
Summary
The Mohave County Board of Supervisors voted to postpone adopting a resolution asking the state to include the Hualapai Valley Groundwater Basin in statewide groundwater-management legislation until staff and regional agencies present finalized 2024 model updates and monitoring-well plans.
The Mohave County Board of Supervisors voted May 19 to postpone action on a resolution supporting inclusion of the Hualapai Valley Groundwater Basin in statewide groundwater-management legislation until the county and the U.S. Geological Survey and Arizona Department of Water Resources complete and present updated modeling and monitoring data.
County Manager Sam Elders told the board the USGS model, first run with 2019 data and again updated with 2024 inputs, continues to show a deficit between annual pumping and recharge in the basin. Elders said the county plans a formal presentation of the 2024 model and related findings to the board in June.
The move to delay came after questions from supervisors about how much of the pumping recorded in the model is attributable to municipal users versus agricultural users and whether recent changes in crop type and acreage materially altered the earlier projections. Elders said the county used ADWR (Arizona Department of Water Resources) reporting plus staff observations of crop acreage and types to update the model; he and public-works staff said some grower reporting to ADWR remains incomplete.
Public testimony at the hearing underscored differing views. Kingman Mayor Ken Watkins and county staff urged the board to support protective legislation, saying ADWR and USGS findings support concern about an ongoing deficit. Residents and commenters including Steven Robinson and Jennifer Esposito pressed the board to resolve technical questions first, asking why Kingman’s planned injection well had not yet been permitted or brought online and pointing to differing published estimates of aquifer storage and recharge.
After public comment and staff discussion, the board voted to postpone adoption of the resolution until county staff and cooperating agencies finalize and present the updated model results and monitoring‑well data. The board instructed staff to return when the USGS/ADWR presentation is complete so supervisors can consider the technical findings before taking a policy vote.
Why this matters: county officials and residents disagree about whether current water use in parts of the Hualapai Valley is sustainable. Including the basin in state groundwater-management legislation would change oversight and could affect agricultural and municipal water operations. Mohave County’s decision to wait for final, jointly reviewed hydrogeologic results reflects the board’s stated preference to base policy on the most current technical data available.
What’s next: County staff said they expect to present finalized 2024 USGS model output and a monitoring‑well drilling plan in the coming weeks; the board’s postponement leaves the resolution off the table until that presentation.
