Phase II/III Impact Assessment

Location: Iowa, Wisconsin

Client: Alliant Energy

Completion Date: 2011

Burns & McDonnell evaluated the potential impacts of the proposed Section 316(b) Phase II/III rules issued by the Environmental Protection Agency in March 2011 on Alliant Energy's generating assets.

On March 28, 2011, The U.S. Environmental Protection Agency (EPA) issued the proposed rule implementing Section 316(b) of the Clean Water Act at existing cooling water intake structures that withdraw from waters of the United States. Alliant Energy requested evaluations of the potential requirements and costs imposed by the new rule on the following generating assets:

  • Ottumwa
  • Burlington
  • M.L. Kapp
  • Edgewater
  • Lansing
  • Prairie Creek
  • Columbia
  • Nelson Dewey
  • Regulation review
  • Impact analysis
  • Cost estimating

This evaluation determined the facilities' cooling system type, design and actual cooling water intake rates. Based on those parameters, Burns & McDonnell determined the types of studies required, the estimated costs of those studies and the proposed completion dates for the studies. Finally, the likely compliance measures and corresponding conceptual capital costs were estimated for each facility.

Capital cost estimates were provided for two scenarios: that the facility would have to install cooling towers to comply with the entrainment mortality standard, or the existing intake would be deemed Best Technology Available for minimizing entrainment mortality based on a site-specific cost-benefit analysis and only impingement mortality reduction technology would be required.