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Year-Round Operation of Paradise Fossil Plant SCR Systems

Muhlenberg County, Kentucky

In preparation for meeting Clean Air Interstate Rule requirements, the Tennessee Valley Authority (TVA) is considering year-round operation of selective catalytic reduction (SCR) systems for nitrogen oxide (NOx) at Paradise Fossil Plant Units 1, 2, and 3.

Because the 1999 Environmental Assessment (EA) for the Paradise SCRs addressed operation of the SCRs only during the five-month ozone season, TVA prepared this Supplemental EA (SEA) to consider the environmental effects of year-round operations control at current ammonia slip rates.

Two alternatives were considered: Action and No Action. The preferred alternative gives TVA the option of increasing the operation of the three Paradise SCRs beyond the five-month ozone season up to full 12-month operations at a 2 parts per million by volume ammonia slip in order to help TVA meet air quality standards or achieve voluntary NOx reduction targets.

The SEA found minimal additional adverse impacts as compared with the impacts from the current operating schedule. No additional mitigation would be required beyond those commitments provided for in the 1999 Finding of No Significant Impact (FONSI) for the Paradise NOx Reduction EA. TVA selected the Action Alternative and issued a new FONSI on March 3, 2006. In the event that TVA proposes to implement higher slip rates for ammonia, this new action would be subject to the appropriate level of National Environmental Policy Act review.


PDF files, require Adobe Acrobat Reader.

Final Supplemental Environmental Assessment (PDF, 81 kb)

Finding of No Significant Impact (PDF, 20 kb)


Ruth Horton
Tennessee Valley Authority
400 West Summit Hill Dr., WT 9B-K
Knoxville, TN 37902
Phone: 865-632-3719
Fax: 865-632-6855

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