Reclamation Releases the Mormon Island Auxiliary Dam Modification Draft Supplemental EIS/EIR for Public Review; Two Public Open House Sessions Scheduled

Media Contact: Pete Lucero, 916-978-5100

For Release: December 04, 2009

The Bureau of Reclamation has released for public review and comment the Mormon Island Auxiliary Dam (MIAD) Modification Draft 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 the Sacramento Area Flood Control Agency, the lead California State agency.

The preferred MIAD action alternative of jet grouting selected in the Folsom DS/FDR Project EIS/EIR and Record of Decision has been determined to be neither technically nor economically feasible.  Four action alternatives are analyzed in the Draft Supplemental EIS/EIR.  All alternatives address methods to excavate and replace the MIAD foundation, place an overlay on the downstream side, and install drains and filters; the alternatives differ only in their method of excavation.  In addition, all four action alternatives in the Draft Supplemental EIS/EIR include habitat mitigation proposed for up to 80 acres at Mississippi Bar on the shore of Lake Natoma to address impacts from the Folsom DS/FDR Project.

Reclamation will hold two Open House sessions to provide information and receive written comments on the Draft Supplemental EIS/EIR.  The public is welcome to arrive at any time during either Open House to visit with Reclamation staff at information stations, ask questions, and provide their written comments.  The Open House sessions will be held:


December 16, 2009, 6-8 p.m.
Folsom Community Center
West Room
52 Natoma Street
Folsom 95630

December 17, 2009, 6-8 p.m.
El Dorado Hills Community Services District
Pavilion Meeting Room 
1021 Harvard Way
El Dorado Hills 95762

Please visit to view the Draft Supplemental EIS/EIR.  If you encounter problems accessing the document online, please contact the Public Affairs Office at 916-978-5100 or  Information on the Folsom DS/FDR Joint Federal Project is available at

Written comments on the Draft Supplemental EIS/EIR should be mailed by Tuesday, January 19, 2010, to Mr. Matthew See, Bureau of Reclamation, 7794 Folsom Dam Road, Folsom CA  95630, or e-mailed to, or faxed to 916-989-7208.  For questions or to request a CD or paper copy of the Draft Supplemental EIS/EIR, please contact Mr. See at 916-989-7198 (TDD 916-989-7285) or

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Reclamation is the largest wholesale water supplier and the second largest producer of hydroelectric power in the United States, with operations and facilities in the 17 Western States. Its facilities also provide substantial flood control, recreation, and fish and wildlife benefits. Visit our website at and follow us on Twitter @USBR.

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NEPA Documents