National Mining Association
EPARulemakingEPA-R08-OAR-2026-1651

Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Regional Haze Federal Implementation Plan

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Jun 8, 2026
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National Mining Association filings
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National Mining Association filed 1 comment on this docket between Aug 4, 2026 and Aug 4, 2026. 0 other organizations filed here. The comment window closed 32d ago.

What National Mining Association filed (1)

Aug 4, 2026· Comment submitted by National Mining Association· EPA-R08-OAR-2026-1651-0527

Attached please find comments from the National Mining Association. If you have any questions regarding these comments, please contact Tawny Bridgeford at tbridgeford@nma.org.

Abstract

The U.S. Environmental Protection Agency (EPA) is proposing revisions to the Federal Implementation Plan (FIP) addressing regional haze in the State of Wyoming. The EPA is proposing revisions to the FIP’s nitrogen oxides (NOX) best available retrofit technology (BART) requirements for the PacifiCorp Dave Johnston Power Plant Unit 3. In response to PacifiCorp’s letter no longer consenting to closure of Dave Johnston Unit 3, the EPA is proposing to withdraw the NOX BART determination containing the closure requirement. Additionally, in response to a request from PacifiCorp, and in light of new information that was not available at the time the EPA originally promulgated the FIP in 2014, the Agency is also proposing to revise the other NOX BART determination for Dave Johnston Unit 3.

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