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Public Notice: Mine Permit Amendment Application - Black Hills Bentonite LLC, PT0745, TFN 7 2/087

The Black Hills Bentonite, LLC of 55 Salt Creek Highway in Casper, Wyoming has applied
for a mining permit amendment from the Land Quality Division of the Department of
Environmental Quality for the State of Wyoming. The mining permit amendment area for the
mining of bentonite will be located in: Sections 10, 15, and 22, Township 49 North, Range 66
West, Crook County, Wyoming. The area is approximately 10 miles northwest of the town of
Upton, Wyoming. The proposed operation is scheduled to begin October 2025 and is estimated to
continue until 2038.

Information regarding this application may be reviewed in the Office of the Land Quality Division
of the Department of Environmental Quality in Cheyenne and Sheridan or the Crook County
Clerk's Office, Sundance, Wyoming. Written objections to the proposed mining operation must
be received by the Administrator of the Land Quality Division, Department of Environmental
Quality, 200 W. 17th Street, Suite 10, Cheyenne, WY 82002 before the close of business
September 27, 2025. Objections may also be submitted by the same deadline via the Land Quality
Division’s electronic comment portal at [link removed]. The Director
shall issue a final written decision on the application within thirty days after the deadline to file
objections. The applicant or objector may appeal the Director’s written decision to the
Environmental Quality Council (EQC). If a hearing is held, the EQC shall issue findings of fact
and a decision within sixty days after the final hearing. The hearing shall be conducted as a
contested case in accordance with the Wyoming Administrative Procedure Act (W.S. §16-3-101
through §16-3-115), and the right of judicial review shall be afforded as provided in that Act. All
parties as given in W.S. §35-11-406(j) will be mailed a copy of this notice. The Wyoming Oil and
Gas Conservation Commission will be mailed a copy of the application mine plan map as required
in W.S. §35-11-406(j).

"*Para español, visite deq.wyoming.gov*". Americans with Disabilities Act: special assistance or
alternative formats will be made available upon request for individuals with disabilities. Please
provide at least fourteen (14) days before the close of the public comment period for such requests.


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