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Wyandotte Creek GSA adopts new sustainable‑yield method and reclassifies PMAs
Summary
The board voted Feb. 26 to update the sustainable‑yield methodology to a 10‑year rolling average based on measured annual‑report data and to reclassify project and management actions (PMAs) into simpler categories; both measures passed by voice vote.
The Wyandotte Creek Groundwater Sustainability Agency on Feb. 26 voted to change how the agency calculates the basin’s sustainable yield and to adopt revised classifications for project and management actions.
The board approved a consultant recommendation to calculate sustainable yield from measured data in the annual report using a 10‑year rolling average (2015–2024 in the draft), rather than relying each year on an updated regional groundwater model. Laura Fadia of Larry Walker Associates explained that using observed groundwater levels and the annual report’s storage calculations would allow the GSA to update yield…
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