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DEQ - Air

Public Notice

CHAPTER 6, SECTION 2 CONSRUCTION/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 Bentonite Performance Minerals, LLC to construct the Ridinger Mine, a bentonite mine encompassing 311 acres with 152 acres of planned disturbance and 15 acres contemporaneously disturbed. The facility will include bentonite stockpiling, exposed acreage, and haul activity. The Ridinger Mine is located in Sections 27, 28, 33, and 34, T58N, R63W, approximately twenty-three (23) miles north-northeast of Hulett, in Crook County, Wyoming. The applicant estimates an annual production rate of 100,000 tons. No crushing, screening, blasting, concrete batch plants or hot mix asphalt plants are planned for this site.

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, utilizing facility ID F031513 and permit number P0037729 under permits. This material may also be viewed online, at the above URL, utilizing a public computer at the Crook County Library, Sundance, Wyoming. Additionally, for the duration of the public comment period a copy of this public notice is available for public inspection at the Crook County Clerk’s Office, Sundance, Wyoming.

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 A0016343 in your comment. Comments may also be submitted electronically through the Division’s website ( Comments submitted by email will not be included in the administrative record. All comments received by 5:00 p.m., Monday, June 10, 2024 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  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.

Publish: May 9, 2024

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