WMRD, AML | Draft Environmental Assessment Sunset Mine | Comment Period Ends July 07, 2026
General Reasonable Necessity Statement
The Sunset Mine Drainage Project responds to emergency groundwater flooding events that occurred in July 2024, which resulted in significant flooding at 221/217 Grant Avenue South. These events prompted the rapid installation of a temporary dewatering system to mitigate rising hydrostatic pressure believed to be caused by the failure of a historic abandoned mine drainage pipeline. This EA provides a comprehensive analysis of the potential environmental, cultural, and socioeconomic consequences associated with implementing a permanent dewatering solution and related infrastructure. It includes a comparative analysis of alternatives, including the No Action Alternative, and is intended to inform agency decision-making while ensuring full compliance with applicable environmental statutes and permitting requirements.
Draft Sunset Mine Environmental Assessment
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Contact
DEQ AML Program
Attn: John Babcock
(406) 444-6473
Tags: MEPA, Public Comment and AML