Ivins Dams 1-6 Rehabilitation
The Natural Resources Conservation Service (NRCS) is analyzing alternatives to rehabilitate Ivins Dams 1-6 which is located at the base of the foothills in Ivins, Utah. NRCS performed an assessment of Ivins Dams 1-6 in 2005. The 2005 assessment concluded that the Ivins Dams 1-6 does not meet current NRCS and Utah State Dam Safety regulations and engineering standards for a Class “C” dam (potential “Loss of Life”). The purpose of this project is to rehabilitate the dam to meet current NRCS and Utah State Dam Safety regulations, current engineering standards, and stabilize the existing dam structures. The life of the dam would be extended for a minimum of 50 years and a maximum of 100 years. The project would also restore the design storage capacity in the reservoir by possibly raising the height of the dam, removing sediment, enlarging the spillway to pass the Probable Maximum Flood, provide slope stability for seismic events, and as a result potentially increase the reservoir surface area.
This project is being partially funded by the NRCS Small Watershed Rehabilitation Amendments (PL 106-472) which authorizes funding and technical assistance to rehabilitate aging flood control dams built under the Small Watershed Program (PL83-566). NRCS, as the lead federal agency, is initiating NEPA analysis in the form of a Supplemental Watershed Plan and Environmental Assessment to analyze impacts to the natural and human environment from this project. The Environmental Assessment will comply with the Council on Environmental Quality’s regulations at 40 CFR Parts 1500-1508 which require an evaluation of potential environmental impacts associated with federal projects and actions. The project sponsor is the city of Ivinsï»¿.
The project is in the Draft Plan-EA review period and the public/agencies are invited to provide comments on the proposed project.
Public Comment Period
Open: Wednesday, February 11, 2015
Close: Thursday, March 12, 2015
Public Open House
Date: Wednesday, February 25, 2015
Time: 5:00 p.m. – 7:00 p.m.
Place: Ivins City Hall
55 North Main Street
Hard copies may be viewed at:
Santa Clara Library – 1099 Lava Flow Drive, St. George, UT
Ivins City Hall (address listed above)
For further project information please contact:
Greg Allington – McMillen, LLC
1401 Shoreline Drive
Boise, ID 83702
Norm Evenstad – NRCS
125 S. State Street – Room 4010
Salt Lake City, UT 84138-1100
Utah Division of Water Rights Dam Safety – Ivins Dam 1 Website
Utah Division of Water Rights Dam Safety – Ivins Dam 2 Website
Utah Division of Water Rights Dam Safety – Ivins Dam 3 Website
Utah Division of Water Rights Dam Safety – Ivins Dam 4 Website
Utah Division of Water Rights Dam Safety – Ivins Dam 5 Website
Utah Division of Water Rights Dam Safety – Ivins Dam 6 Website
Ivins Dams 1-6 Draft Plan-EA Total Report (PDF, 49.7 MB)
Scoping Report (PDF, 2.83 MB)
Scoping Notice (PDF, 294 KB)
Scoping Project (PDF, 202 KB)
Scoping Public Meeting Presentation (PDF, 202 KB)
NOTE: USDA-NRCS will add other directories and documents as we move through subsequent phases of the NEPA process.
Updated: February 11, 2015