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After tests show radionuclides and limited yield, commission recommends selling Sheep Mountain No. 2 well to Douglas

Wyoming Water Development Commission / Select Water Committee · October 31, 2025
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Summary

Testing of a newly drilled well revealed elevated radiological constituents and limited potable yield after blending; staff recommended the City of Douglas purchase the well for direct drilling costs and the commission voted to request enabling legislation to complete the transfer.

The Wyoming Water Development Commission voted Jan. 20 to recommend allowing the City of Douglas to acquire Sheep Mountain No. 2, a test well drilled under a Level‑2 study, after testing showed the hole contains elevated radionuclide levels and a lower usable potable yield than hoped.

George Mosier of the Water Development Office summarized the study and pump tests: the borehole is approximately 1,350 feet deep and open‑hole below 455 feet; geochemical testing identified exceedances of primary drinking water standards for gross alpha and radium‑226/228. Mosier said an on‑site treatment system or long transmission pipelines to blend the source with other supplies would be costly — estimates ranged from about $4 million (ion exchange plus upsized…

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