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Clean Air Act stationary source · ICIS-AIR WY0000005602100139

CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER), Cheyenne, WY: Clean Air Act compliance record, inspections, violations, penalties

CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER), at SECTION 1, T13N, R66W, Cheyenne in Laramie County, Wyoming, is an operating major source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “No Violation Identified”. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.

Identity

Facility as filedCHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER)
ICIS-AIR IDWY0000005602100139
EPA facility registry ID110071012329
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
AddressSECTION 1, T13N, R66W, Cheyenne, WY 82001
CountyLaramie County
In a nonattainment countyNo (EPA Green Book)
Industry (NAICS)Utilities (NAICS 2211)
SIC code4911
EPA region08

Cited to the EPA ICIS-AIR facility file (ECHO download).

Programs and pollutants

Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER) is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
August 17, 2026FCE On-SiteStateTitle V Permits
September 24, 2024FCE On-SiteStateTitle V Permits
September 21, 2022FCE On-SiteStateTitle V Permits
July 9, 2020FCE Off-SiteStateTitle V Permits
December 14, 2017FCE On-SiteStateTitle V Permits

Violations

A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.

EPA’s violation history file holds no violation for ICIS-AIR WY0000005602100139 since January 1, 2017.

Enforcement and penalties

0 formal enforcement actions since January 1, 2017, 0 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.

Informal enforcement

EPA’s informal action file holds no notice or warning for ICIS-AIR WY0000005602100139 since January 1, 2017.

Stack tests

DateWhat EPA recordedAgency
April 9, 2026PassState
April 9, 2026PassState
April 9, 2026PassState
August 13, 2025PassState
August 13, 2025PassState
August 13, 2025PassState
August 13, 2025PassState
August 13, 2025PassState
August 13, 2025PassState
August 13, 2025PassState
August 13, 2025PassState
September 11, 2024PassState
September 11, 2024PassState
September 11, 2024PassState
September 10, 2024PassState
September 10, 2024PassState
September 10, 2024PassState
September 9, 2024PassState
September 9, 2024PassState
May 9, 2024PassState
May 9, 2024PassState
May 9, 2024PassState
May 9, 2024PassState
May 8, 2024PassState
May 8, 2024PassState
September 14, 2023PassState
September 14, 2023PassState
September 12, 2023PassState
September 12, 2023PassState
September 12, 2023PassState
May 16, 2023PassState
November 1, 2022PassState
September 21, 2022PassState
September 21, 2022PassState
May 17, 2022PassState
May 3, 2022PassState
November 17, 2021PassState
June 9, 2021PassState
January 18, 2021PassState
December 7, 2020PassState
July 22, 2020PassState
June 6, 2019PassState
June 6, 2019PassState
June 3, 2019PassState
April 19, 2018PassState
April 18, 2018PassState
April 27, 2017PassState
April 26, 2017PassState

Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110071012329 there.

Nearby on the register

Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.