Public Notice: Peabody Power River Mining North Antelope Rochelle Mine

Peabody Power River Mining

North Antelope Rochelle Mine

PUBLIC NOTICE

STATE OF WYOMING

Department of Environmental Quality - Air Quality Division

North Antelope Rochelle Mine, December 11, 2021, September 8, 2022, December 13, 2022 & August 3, 2024, Exceptional Events Demonstrations

The Wyoming Air Quality Division (AQD) will submit Exceptional Events Demonstrations for the North Antelope Rochelle Mine, December 11, 2021, September 8, 2022, December 13, 2022 & August 3, 2024, PM₁₀ exceedances attributed to high wind and smoke events to EPA Region 8 in accordance with 40 CFR 50.14. The AQD is soliciting comments from the interested public on these Exceptional Events Demonstrations. The plan is available for public comment, and the public will be allowed a period of thirty (30) days to submit written comments. Public comments must be received no later than October 7, 2025. All comments received by the close of business on October 7, 2025, will be submitted to EPA's Region 8 along with the Exceptional Events Demonstrations and will be retained on file in the Cheyenne office.

Notice is hereby given the State of Wyoming, Department of Environmental Quality, Air Quality Division, proposes to submit the North Antelope Rochelle Mine, December 11, 2021, September 8, 2022, December 13, 2022 & August 3, 2024, for PM₁₀ exceedances to the EPA.

Comments can be submitted to the AQD's Air Pollution Monitoring Program Manager, Mr. Mark R. Gagen, Air Pollution Monitoring Program Manager, Air Quality Division, Department of Environmental Quality, 200 West 17^th Street, 3^rd Floor, Cheyenne, Wyoming 82002. Comments may also be submitted electronically through the following website: ( https://aq.wyomingdeq.commentinput.com/comment/search ). Comments submitted by email will not be accepted. Interested parties may examine the documentation packet and relevant supporting materials on AQD's website https://deq.wyoming.gov/aqd/monitoring/ . In accordance with the Americans with Disabilities Act, special assistance or alternate formats will be made available upon request for individuals with disabilities. Para espanol 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