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  2. Permitting Under the Clean Air Act

Title V Operating Permit Public Petition Deadlines in Region 8

This table lists Proposed Title V Operating Permits submitted to Region 8 and undergoing EPA's 45-day Review, including the start and end dates for EPA's 45-day review period. It also lists the start and end dates for the public's 60-day petition period

State Company and Facility Name Permit Number Type of Permit Action EPA 45-Day Review
Period Start Date
EPA 45-Day Review
Period End Date

60-Day Public Petition Period Start Date
60-Day Public Petition Period End Date Review Type
Colorado Allied Waste Systems of Colorado - Jeffco Foothills Landfill 99OPJE221 Renewal and Minor Modification 6/17/2025 7/31/2025 8/1/2025 9/29/2025 Concurrent
Colorado Public Service Company of Colorado - Haden Station 96OPRO132 Renewal 6/12/2025 7/28/2025 7/29/2025 9/26/2025 Concurrent
Colorado Boulder Scientific Company - Mead Facility 23OPWE577 Initial 6/6/2025 7/21/2025 7/22/2025 9/19/2025 Sequential
Colorado Phillips 66 Company - Phillips 66 Pipeline LLC - Denver Terminal 96OPAD160 Minor Modification 6/6/2025 7/21/2025 7/22/2025 9/19/2025 Sequential
Colorado Williams Gilcrest, LLC - Kersey Compressor Station 21OPWE462 Initial 6/6/2025 7/21/2025 7/22/2025 9/19/2025 Sequential
Colorado Tri-State Generation and Transmission Association, Inc - Limon Generating Station 02OPLI253 Renewal 5/29/2025 7/14/2025 7/15/2025 9/12/2025 Concurrent
Colorado Colorado Interstate Gas Company, LLC - Totem Natural Gas Transmission and Storage Facility

21OPAD443

Significant Modification

5/29/2025

7/14/2025

7/15/2025

9/12/2025

Concurrent

Colorado Enterprise Gas Processing, LLC - Meeker Gas Plant 10OPRB346 Initial 5/29/2025 7/14/2025 7/15/2025 9/12/2025 Concurrent
Colorado University of Colorado at Boulder - Campus (West District Energy Plant, Williams Village, East District Energy Plant)

95OPBO059

Renewal

5/28/2025

7/11/2025

7/12/2025

9/9/2025

Concurrent

Colorado Las Animas Municipal Power and Light - Las Animas Municipal Power Plant 01OPBE233 Initial 5/23/2025 7/7/2025 7/8/2025 9/5/2025 Sequential
Colorado DCP Operating Company, LP - Crossroads Facility 21OPWE447 Initial 5/22/2025 7/7/2025 7/8/2025 9/5/2025 Sequential
Colorado Holly Energy Partners - Operating, L.P. - Denver Products Terminal 96OPAD172 Minor Modification 5/20/2025 7/3/2025 7/4/2025 9/2/2025 Sequential
Colorado Colorado Department of Human Services Southern District, Facilities Management - Colorado Mental Health Institute at Pueblo 95OPPB068 Renewal 5/20/2025 7/3/2025 7/4/2025 9/2/2025 Concurrent
Colorado Red Rock Gathering Company, LLC - Holmes Mesa Compressor Station 10OPGA352 Renewal 5/20/2025 7/3/2025 7/4/2025 9/2/2025 Concurrent
Colorado Red Rock Gathering Company, LLC - Rifle Clough Compressor Station - Reopening 96OPGA137 Minor Modification 5/13/2025 6/26/2025 6/27/2025 8/25/2025 Concurrent
Colorado Boulder Scientific Company - Mead Facility 23OPWE577 Renewal 6/6/2025 7/21/2025 7/22/2025 9/19/2025 Sequential
Colorado Public Service Company of Colorado - Yosemite Air Blend Plant 02OPWE247 Renewal 4/29/2025 6/12/2025 6/13/2025 8/13/2025 Concurrent
Colorado Caerus Energy Services, LLC - StoryGulch Compressor Station 13OPGA380 Renewal 4/24/2025 6/9/2025 6/10/2025 8/8/2025 Sequential
Colorado Bargath, LLC - Hayes Gulch Compressor Station 10OPGA343 Renewal 2/28/2025 4/14/2025 4/15/2025 6/16/2025 Sequential
Colorado Bargath, LLC - Riley Compressor Station 08OPGA317 Renewal 2/28/2025 4/14/2025 4/15/2025 6/16/2025 Sequential
Colorado Teleport Communications America, LLC - AT&T Telecommunications Service Facility 23OPDE580 Initial 3/19/2025 5/2/2025 5/3/2025 7/1/2025 Sequential
Colorado CoorsTek, Inc. - GMC South, Clear Creek Valley Plant (CCVP) 21OPJE465 Renewal 3/10/2025 4/23/2025 4/24/2025 6/26/2025 Sequential
Colorado Rocky Mountain Metal Container 96OPJE139 Renewal 3/27/2025 5/12/2025 5/13/2025 7/11/2025 Sequential
Colorado Elevation Midstream, LLC - Buffalo Compressor Station 21OPWE468 Initial 3/13/2025 4/28/2025 4/29/2025 6/27/2025 Sequential
Colorado Colorado Interstate Gas Company, LLC - Watkins Compressor Station 95OPAD047 Renewal 3/18/2025 5/1/2025 5/2/2025 7/2/2025 Sequential
Colorado Public Service Company of Colorado - Alamosa Combustion Turbines 98OPAL203 Renewal 3/18/2025 5/1/2025 5/2/2025 7/2/2025 Concurrent
Colorado Bonanaza Creek Energy Operating Company, LLC - North Platte 14-36 22OPWE492 Initial 4/2/2025 5/16/2025 5/17/2025 7/21/2025 Sequential
Colorado Public Service Company of Colorado - Comanche Station 6OPPB133 Renewal
 
 4/8/2025  5/22/2025 5/23/2025 7/23/2025 Concurrent
Colorado DCP Operating Company, LP - Spindle Natural Gas Processing Plant 95OPWE039 Renewal 4/9/2025 5/23/2025 5/24/2025 8/4/2025 Concurrent

Colorado

Utah GasOP Ltd. dba Utah Gas Corp - Dragon Trail Gas 95OPRB044 Renewal 4/16/2025 5/30/2025 5/31/2025 8/4/2025 Sequential
Montana Par Montana, LLC - Billings Refinery OP1564-22 Renewal 6/3/2025

 7/17/2025

6/18/2025 9/15/2025 Sequential
North Dakota Cargill Corn Milling AOP-28379 v6.0 Renewal 3/1/2025 4/14/2025 4/15/2025 6/16/2025 Sequential
South Dakota NorthWestern Energy Title V Construction and Amendment 28.0801-03-02C Minor Modification 5/21/2025 7/7/2025 7/8/2025 9/5/2025 Concurrent
Southern Ute El Paso Natural Gas Company - Bondad Compressor Station V-SUIT-0028-2023.00 Renewal 3/11/2025 4/24/2025 4/25/2025 6/23/2025 Sequential
Utah Hill Air Force Base 1100007004 Renewal; Administrative Amendment 5/3/2025 6/16/2025 6/17/2025 8/15/2025 Sequential
Utah Materion Natural Resources - Delta Mill 2700001005  Renewal 4/22/2025 6/5/2025 6/6/2025 8/4/2025 Sequential
Utah Central Valley Water Reclamation Facility - Wastewater Treatment Plant AN104140015-21 Renewal; Administrative Amendment 4/17/2025 6/2/2025 6/3/2025 8/1/2025 Sequential

Permitting Under the Clean Air Act

  • Clean Air Act Permitting Around the Nation
    • New England Region (R1)
    • New York, New Jersey, Puerto Rico and U.S. Virgin Islands (R2)
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    • Great Lakes Region (R5)
    • South Central Region (R6)
    • Midwest Region (R7)
    • Mountains and Plains Region (R8)
    • Pacific Southwest Region (R9)
      • Air Permit Delegation and PSD SIP Approval
      • Electronic Permit System and Dashboards
      • Pending and Issued Permits
      • About NSR Permitting
      • About OCS Permitting
      • About PSD Permitting
      • About Title V Permitting
      • Permitting in Arizona
      • Permitting in California
      • Permitting in Hawai'i and Pacific Islands
      • Permitting in Nevada
    • Pacific Northwest Region (R10)
  • CAA Permitting Tools & ​Related Resources
  • Outer Continental Shelf Air Permits
Contact Us About Permitting Under the Clean Air Act
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Last updated on June 16, 2025
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