IDEM opens 30-day comment window on draft air permit for Cummins’ Columbus engine plant
IDEM is taking public comments through Nov. 21 on a proposed change to the air permit for Cummins’ Columbus Engine Plant in Bartholomew County. The company applied to increase the engine capacity allowed in Test Cell 10 from 500 to 900 horsepower for diesel, biodiesel and JP-8 fueled engines, and to change the coolant type and use rate in a machining operation. IDEM’s notice says the draft adds no equipment that would emit air pollutants. These are proposed permit changes, not a final approval or a plant expansion announcement. After the comment period, IDEM will issue a decision that may differ from the draft.
IDEM is taking public comments through Nov. 21 on a proposed change to the air permit for Cummins’ Columbus Engine Plant in Bartholomew County. The company applied to increase the engine capacity allowed in Test Cell 10 from 500 to 900 horsepower for diesel, biodiesel and JP-8 fueled engines, and to change the coolant type and use rate in a machining operation. IDEM’s notice says the draft adds no equipment that would emit air pollutants. These are proposed permit changes, not a final approval or a plant expansion announcement. After the comment period, IDEM will issue a decision that may differ from the draft.
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SOURCE STATUS: One-source report; independent confirmation pending.
Sources
- Indiana Department of Environmental Management (IDEM): IDEM Public Notices — Central Indiana: Cummins, Inc. draft air permit public comment period (Columbus engine plant) ↗
- www.in.gov ↗
Linked source published October 28, 2026 at 6:35 AM EDT. A sourced news brief; no independent staff reporting is implied. Prepared with AI assistance; source-dependent claims remain attributed in the article.
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