Title V Draft Permit Tallgrass Interstate Gas Transmission LLC, Casper CS
Wyoming Department of Environmental Quality sent this bulletin at 03/19/2026 06:00 AM MDT
Title V Draft Permit Tallgrass Interstate Gas Transmission LLC, Casper CS
PUBLIC NOTICE State of Wyoming, Department of Environmental Quality/Division of Air Quality Draft Operating Permit
Chapter 6, Section 3(d)(ix) of the Wyoming Air Quality Standards and Regulations provides, prior to final determination on an application for a Chapter 6, Section 3 operating permit, opportunity be given for public comment and public hearing on the information submitted by the owner or operator and on the draft permit. The regulation further requires such information be made available to the public and the public be allowed a period of thirty (30) days to submit comments. A public hearing will be conducted only if, in the opinion of the Administrator, sufficient interest is generated or if an aggrieved party requests a hearing within the 30 day public comment period.
Notice is hereby given on March 19, 2026 that the State of Wyoming, Department of Environmental Quality, Division of Air Quality, proposes to issue a renewed Chapter 6, Section 3 operating permit to the following applicant for the Casper Compressor Station in Natrona County, Wyoming:
Tallgrass Interstate Gas Transmission LLC 370 Van Gordon Street Lakewood, CO 80228
The Casper Compressor Station is located in Section 5, Township 33 North, Range 78 West, Natrona County, Wyoming (approximately 1 mile east of Evansville, Wyoming). The facility is a natural gas transmission facility. The pollutants of primary concern from this facility are Nitrogen Oxides (NOX), Carbon Monoxide (CO), and Volatile Organic Compounds (VOCs).
Chapter 6, Section 3 does not impose new substantive requirements on an air pollution source but does require sources subject to the Operating Permit Program obtain a renewable operating permit that clarifies in a single document which air quality requirements apply to the source and provides methods for assessing the source's compliance with those requirements.
The Division's Operating Permit contact is Melissa Meares, Operating Permit Program Manager, Division of Air Quality, Department of Environmental Quality, 200 West 17th Street, Cheyenne, Wyoming 82002 at (307) 777-3784. Interested parties may examine the draft permit, permit application, and statement of basis for the permit at the Division's Cheyenne office or the Division's Casper Field Office located at 444 West Collins Drive, Casper, Wyoming, (307) 473-3455. These documents are also available online at the Division’s website (https://openair.wyo.gov), utilizing facility ID F027558 and permit number P0037049 under permits. Arrangements can be made with the Division to copy relevant materials, if necessary (a fee will be assessed for reproductions).
Public comments or a request for a hearing must be received no later than 5:00 p.m. local time (Mountain) on April 20, 2026. Requests for a hearing shall be in writing and shall include the name and contact information of the person requesting the hearing, a brief statement identifying the purpose of the request, and a brief statement of the issues to be discussed. Written public comments or requests for a hearing should be directed to the Administrator, Division of Air Quality, Department of Environmental Quality, 200 West 17th Street, Cheyenne, Wyoming 82002. The FAX number for the Division is (307) 635-1784. Comments may also be submitted electronically through the Division’s website (http://aq.wyomingdeq.commentinput.com). Comments or requests submitted by email will not be included in the administrative record. All written comments received by 5:00 p.m. local time (Mountain) on April 20, 2026 will be considered in arriving at a final determination on the issuance of this permit and will be retained in the Cheyenne office.
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.
