Public Notices: Tallgrass Midstream, LLC (F000470/A0018494), (F000468/A0018418)

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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:

Tallgrass Midstream, LLC (F000470, P0040351):

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 Tallgrass Midstream, LLC to update the compressor blowdown and start-up (SSM) emissions (BVC005) and that the existing Emission Units (EUs) BVC005, BVC006, BVC009, and BVC012 be grouped under one (1) EU identifier, EU BVC005 at the Scott Compressor Station located in the SE¼ SE¼ of Section 4, T35N, R71W, approximately fifteen (15) miles south-southwest of Bill, in Converse County, Wyoming.

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 F000470 and permit number P0040351 under permits. This material may also be viewed online, at the above URL, utilizing a public computer at the Converse County Library, Douglas, Wyoming. Additionally, for the duration of the public comment period a copy of this public notice is available for public inspection at the Converse County Clerk's Office, Douglas, 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 A0018494 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., Friday, January 23, 2026 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.

Tallgrass Midstream, LLC (F000468/P0040352)

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 Tallgrass Midstream, LLC to update the compressor blowdown and start-up (SSM) emissions (BVC001) and that the existing Emission Units (EUs) BVC001, BVC004, and BVC007 be grouped under one (1) EU identifier, EU BVC001 at the Well Draw - Aurora Compressor Station located in the SE¼ SE¼ of Section 21, T35N, R69W, approximately eighteen (18) miles south-southeast of Bill, in Converse County, Wyoming.

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 F000468 and permit number P0040352 under permits. This material may also be viewed online, at the above URL, utilizing a public computer at the Converse County Library, Douglas, Wyoming. Additionally, for the duration of the public comment period a copy of this public notice is available for public inspection at the Converse County Clerk's Office, Douglas, 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 A0018418 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., Friday, January 23, 2026 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