Sacramento District > Missions > Civil Works

US Army Corps of Engineers

Sacramento District Website

/ / /

Folsom Dam

Folsom Dam Raise Project

The U.S. Army Corps of Engineers Sacramento District is moving forward with the Folsom Dam Raise Project to help further reduce flood risk in the Greater Sacramento area. The overall project includes the following authorized components: a three-and-a-half foot raise of the Folsom Facility dikes, Mormon Island Auxiliary Dam (MIAD), Left Wing Dam (LWD), and Right Wing Dam (RWD), along with modifications to the main dam’s Tainter gates; construction of automated temperature control shutters at the main dam to benefit American River fisheries, and; habitat restoration at two sites along the lower American River - Bushy Lake Restoration Site and Woodlake Restoration Site. The overall project also included construction of the Folsom Dam Bridge, which was completed in 2009.

The Dam Raise Project has prioritized completion of the remaining flood risk reduction elements of the overall project, which include raising the existing crest elevation of Dikes 1 through 8, MIAD, LWD, and RWD by approximately 3.5 feet, plus various structural changes to Folsom Dam (primarily modifications to the Tainter gates situated near the crest of the dam). This work is expected to enhance utilization of Folsom Lake’s existing surcharge flood storage space and increase the temporary water storage space that can be used during flood events.

The Corps, in coordination with the California Central Valley Flood Protection Board and the Sacramento Area Flood Control Agency, has prepared a joint Supplemental Environmental Impact Statement/Environmental Impact Report (SEIS/EIR) for the flood risk reduction elements of the Dam Raise Project mentioned above. The draft SEIS/EIR was first released for public review in July 2016. This version of the SEIS/EIR underwent substantial revisions following the original review period. The revised draft SEIS/EIR was released for public review in June 2017. The Corps released the final SEIS-EIR in October 2017. The record of decision was signed in December 2017.

Upcoming Public Meetings

FOLSOM DAM RAISE NOTICE OF INTENT FOR DRAFT SEIS/EIR PUBLIC COMMENT BY WEBINAR/TELECONFERENCE

Notice of Intent (Federal Register)

Meeting Slides (Click Here)

Wednesday, April 8, 2020, 5-6 p.m. PST
You may join the meeting as early 4:45 p.m. PST so that meeting organizers may address any technical issues you have connecting to the meeting. You may join the meeting late but technical assistance may not be available.

For Webinar: Visit https://usace.webex.com/, and enter Meeting Number: 964 384 499
Enter your name and email address. When prompted, you must ask the system to call you back if you would like to use audio during the meeting. The audio on your computer will not work - only phone access works.

Please see below for call-in instructions:
For Teleconference (Toll-free): 1-888-363-4735
Caller Paid and International: 1-215-446-3657
Access Code on prompt: 841 183 9# Security Code: 0408
You can join the meeting at any time.

If callers experience any technical difficulties, please hang up and call again. If you need technical assistance, call the AT&T Help Desk at 1-888-796-6118.

Americans with Disabilities Act accommodations or translation services are available for individuals with hearing or speech disabilities by calling 7-1-1, a free nationwide telecommunications relay service (TRS). For other accommodations, please email your request 72 hours in advance to Folsom-Dam_Raise@usace.army.mil

Participants will be able to comment (3-minute limit) and listen to other callers’ comments. Calls will be recorded and comments will be included in the comment record.

If additional webinars/teleconferences are necessary (due to technical difficulties, etc.), details of any future meetings will be posted here.

We will provide instructions for indicating your interest in providing a comment. We also will pause occasionally to repeat these instructions.

Due to technical limitations, we are not able to tell you how many individuals wishing to comment are in line ahead of you. Thank you for your patience.

IMPORTANT: Teleconferences will be recorded. By speaking, you automatically consent to such recordings. Before including your address, phone number or any other personal identifying information in your comment, be aware that your entire comment may be made available to the public. While individuals providing comments can ask the agencies to withhold this information from public review, the agencies cannot guarantee that they will be able to do so.