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Construction of a Third Hydroelectric Generating Unit - Black Canyon Dam
Final Environmental Assessment

Black Canyon DamReclamation made the first announcement to construct a new third hydroelectric unit at Black Canyon Diversion Dam in a news release issued on July 26, 2010.  Prior to the announcement, Reclamation coordinated with the State Historic Preservation Office (SHPO) and the Advisory Council on Historic Preservation (ACHP) to ensure historic integrity of the dam would not be lost with the addition of a new plant.

Efforts were also undertaken to obtain an updated list of potential Endangered Species Act (ESA) listed species within Gem County and the project area.

Environmental Assessment Process:

  • Reclamation’s public involvement process included incorporating comments from individuals and public agencies where appropriate into the Final Environmental Assessment (EA). Editorial revisions were included in the EA to clarify aspects of the document and to ensure accuracy.
  • Based on a thorough review of the comments and analysis of the environmental impacts, Reclamation concluded that constructing a third hydroelectric generation unit will not have a significant effect on the quality of the human environment or natural and cultural resources.

  • Preparation of an Environmental Impact Statement (EIS) is not required and that the Finding of No Significant Impact (FONSI) satisfies the requirements of the National Environmental Policy Act (NEPA) since the construction alternative will be short-term, minor, and localized.

For more information contact Ms. Gretchen Fitzgerald, Bureau of Reclamation, Snake River Area Office, 230 Collins Road, Boise, ID 83702-4520 or call (208) 383-2231.

10/2011 Final Environmental Assessment Finding of No Significant Impact Construction of a Third Hydroelectric Generating Unit - Black Canyon Dam PDF 2.22 mb
06/2011 Construction of a Third Hydroelectric Generating Unit - Black Canyon Dam Draft Environmental Assessment PDF 2.21 mb
Gretchen Fitzgerald
(208) 383-2231|

Bureau of Reclamation
Snake River Area Office
230 Collins Road
Boise, Idaho 83702


Last Update: October 30, 2013 3:03 PM