Department of Environmental Quality, Division of Air Quality PUBLIC NOTICE
CHAPTER 6, SECTION 2 CONSTRUCTION/MODIFICATION PERMIT - Department of Environmental Quality, Division of Air Quality PUBLIC NOTICE: In accordance with Chapter 6, Section 2(m) of the Wyoming Air Quality Standards and Regulations, notice is hereby given that the State of Wyoming, Department of Environmental Quality, Division of Air Quality, proposes to approve a request by Black Hills Bentonite LLC to establish the Perino Mine, a 200 acre bentonite mine, which will include exposed acreage, truck loading, stockpiling, and haul activity, located in Section 20, T47N, R63W, approximately ten (10) miles east-southeast of Upton, in Weston County, Wyoming. No crushing/screening, blasting, concrete batch plants, or hot mix asphalt plants are planned for this site. The applicant estimates an annual production rate of 50,000 tons.
For the duration of the public comment period, the permit application, the agency’s analysis, and the public notice are available for public inspection online at https://openair.wyo.gov, utilizing facility ID F032254 and permit number P0040205 under permits. This material may also be viewed online, at the above URL, utilizing a public computer at the Weston County Library, Newcastle, Wyoming. Additionally, for the duration of the public comment period a copy of this public notice is available for public inspection at the Weston County Clerk’s Office, Newcastle, Wyoming. In accordance with the Americans with Disabilities Act, special assistance or alternate formats will be made available upon request for individuals with disabilities.
Written comments may be directed to Nancy Vehr, Administrator, Division of Air Quality, Department of Environmental Quality, 200 West 17th St., Cheyenne, Wyoming 82002 or by fax (307) 635-1784. Please reference A0018235 in your comment. Comments may also be submitted electronically through the Division’s website (http://aq.wyomingdeq.commentinput.com). Comments submitted by email will not be included in the administrative record. All comments received by 5:00 p.m., Monday, September 29, 2025 will be considered in the final determination on this application. A public hearing will be conducted only if in the opinion of the administrator sufficient interest is generated or if an aggrieved party so requests. Para español, visite deq.wyoming.gov.
(Publish August 28, 2025)