Public Notices: Black Hills Bentonite LLC (F000429/A0017391)

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Electronic copies of all public notices, permit application analyses, and permit applications are now available through the IMPACT Public-Facing Website OpenAir. For more information on OpenAir, please visit our website here.

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The Division of Air Quality, proposes to approve the following requests:

Clack Hills Bentonite LLC (F000429, P0039859):

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 increase the allowable production limit for the Worland Plant, located at 1025 ½ Lane, approximately one (1) mile north of Worland, in Washakie County, Wyoming, from a current production rate of 394,200 tons per year (tpy) to 500,000 tpy.

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 F000429 and permit number P0039859 under permits. This material may also be viewed online, at the above URL, utilizing a public computer at the Washakie County Library, Worland, Wyoming. Additionally, for the duration of the public comment period a copy of this public notice is available for public inspection at the Washakie County Clerk's Office, Worland, 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 Amber Potts, Administrator, Division of Air Quality, Department of Environmental Quality, 200 West 17th St., Cheyenne, Wyoming 82002 or by fax (307) 635-1784. Please reference A0017391 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, October 20, 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.

Please note that the Wyoming Department of Environmental Quality Cheyenne Office has moved.
The new address is:

200 West 17th Street
Cheyenne, WY 82002