News Release Archive

Reclamation Releases the Mormon Island Auxiliary Dam Modification Project Final Supplemental EIS/EIR

Media Contact: Pete Lucero, 916-978-5100 TTY 916- 978-5608 , 05/07/2010 16:42
Matthew See, 916-989-7198  TTY 916-989-7285, msee@usbr.gov

For Release: May 07, 2010

- Modified - The Bureau of Reclamation and Sacramento Area Flood Control Agency (SAFCA) have released the Mormon Island Auxiliary Dam (MIAD) Modification Project Final Supplemental Environmental Impact Statement/ Environmental Impact Report (EIS/EIR), which tiers from the March 2007 Folsom Dam Safety and Flood Damage Reduction (DS/FDR) Final EIS/EIR. The site-specific MIAD Draft Supplemental EIS/EIR was developed pursuant to the National Environmental Policy Act and California Environmental Quality Act by Reclamation, the lead Federal agency, and SAFCA, the lead State agency.

The MIAD Modification Project Final Supplemental EIS/EIR discusses the project background, purpose and need, project description, and revisions to the Draft EIS/EIR. Responses to all comments received from interested individuals and organizations on the Draft EIS/EIR during the public review period are provided in the Final EIS/EIR. The MIAD Modification Project proposed action being considered is the alternative that includes:

  • Cellular open excavation as the preferred method to excavate and replace the downstream MIAD foundation to reduce seismic (earthquake) risks associated with the downstream foundation.

  • Placement of an overlay on the downstream side of MIAD to address seismic (earthquake) risks associated with the upstream foundation and installation of filters and drains to reduce static (seepage and piping) risks.

  • Creation of up to 80 acres of riparian habitat mitigation and 5 acres of seasonal wetland mitigation at Mississippi Bar.

In accordance with NEPA, no decision will be made on the proposed action for at least 30 days, after which time Reclamation will complete the Record of Decision (ROD). SAFCA will complete the CEQA certification on the Final EIR. The ROD and CEQA certification will identify the recommended action to be implemented, including any measures found necessary to avoid, reduce, or mitigate any significant adverse environmental effects.

The Final EIS/EIR may be viewed on-line. For a CD or bound copy or for questions, please contact Mr. Matthew See, Reclamation, at 916-989-7198 (TTY 916-989-7285). Information on the Folsom Dam JFP may be viewed online.

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Relevant Link:

NEPA Documents