Final Environmental Assessment
Colbert Fossil Plant
Reduction systems for nitrogen oxide control on Units 1 through 5
TVA has prepared an Environmental Assessment of the proposed installation and operation of equipment for the removal of nitrogen oxides (NOx) from coal combustion flue gases at Colbert Fossil Plant. The plant is located in Colbert County, Alabama, about 10 miles west of Tuscumbia and three miles east of Cherokee. Installation of the NOx removal equipment will begin in 2003 and be completed in 2005.
Nitrogen oxide emissions are a factor in causing acid rain and high ground-level ozone concentrations. NOx is produced in motor vehicle and industrial combustion processes, including electric power generation stations such as TVA’s Colbert Fossil Plant. TVA must meet the new Title 1 Clean Air Act (CAA) requirements for ozone, which is formed in part by NOx.
To meet CAA requirements, TVA is considering two alternative technologies for installation at Colbert Fossil Plant. They are a selective catalytic reduction (SCR) system or a NOx Tech System. Either system is expected to reduce emissions of NOx from the plant by up to 90 percent. Either would be primarily installed within the existing plant structure and include an ammonia storage facility, also located within the plant site. A combination of the two systems, such as installation of SCR equipment on Unit 5 and installation of NOx Tech systems on Units 1 through 4, may be used. .
In accordance with the National Environmental Policy Act, TVA has prepared a final Environmental Assessment on the no-action alternative and three proposed alternative actions to comply with Clean Air Act requirements regarding NOx emissions.
The final environmental assessment can be viewed by section, as noted below (PDF files, require Adobe Acrobat Reader):
and Table of Contents (35 kb)
1: Purpose, Need, and Background for the Proposed Action (215
2: Alternatives, Including the Proposed Action (434 kb)
3: Resources and Environment Impacts (470 kb)
A (139 kb)
B (607 kb)
C (36 kb)
Finding of No Significant
Impact (36 kb)
Printed copies of this EA are available for viewing at:
For more information or to provide comments, contact:
Tina M. Tomaszewski,
Senior NEPA Specialist