Black Hills Bentonite’s Midwest 5-A Plan of Operations
The Bureau of Land Management (BLM) is announcing the availability of the proposed Mine Plan of Operations submitted by Black Hills Bentonite, LLC for the Midwest 5-A Project, located in Township 40N, Range 79W, Sections 5, 8, and 17 in Natrona County, State of Wyoming.
The proposed plan outlines the company’s intent to develop and operate an open-pit bentonite mine on approximately 227 acres of public land administered by the BLM. The plan includes details on mining methods, reclamation measures, and environmental protection practices.
The BLM invites the public to review the Mine Plan of Operations and submit written comments. The comment period will be open from March 26, 2026, through April 25, 2026. All comments must be received or postmarked by the closing date.
Copies of the plan are available for review at the BLM Casper Field Office, 2987 Prospector Dr., Casper, WY, during normal business hours, and linked below under Related Files.
Comments by Email: [email protected]
Comments by Mail:
BLM Casper Field Office
Attn: Midwest 5-A Project Comments
2987 Prospector Dr.
Casper, WY 82604
For additional information or questions, please contact:
Matt Clark | Project Lead
BLM WY | High Plains District
307-261-7584
[email protected]
The BLM manages about 245 million acres of public land located primarily in 12 western states, including Alaska, on behalf of the American people. The BLM also administers 700 million acres of sub-surface mineral estate throughout the nation. Our mission is to sustain the health, diversity, and productivity of America’s public lands for the use and enjoyment of present and future generations.