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City advisory member briefs council on groundwater modeling, 10% reduction target under SGMA
Summary
An advisory-committee member reported modeling from the county’s supply-and-demand assessment showing a 10% reduction in pumping (especially within 1,500 feet of streams) meets the basin’s sustainability model goals; Saint Helena’s municipal wells pose different operational concerns but the city should aim to contribute to regional reductions, the presenter said.
Mister Hardy, who serves on the Groundwater Sustainability Plan advisory committee and is an elected city council member, briefed the council on county modeling and the implications of the Sustainable Groundwater Management Act (SGMA).
Hardy summarized three recharge and demand scenarios under the county’s assessment and provided model figures: base-period pumping (2005–2014) averaged about 15,000 acre‑feet per year across the basin,…
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