Dry Creek Debris Basin Rehabilitation
The Natural Resources Conservation Service (NRCS) is analyzing alternatives to rehabilitate Dry Creek Debris Basin which is located within the cities of Lehi and Highland, Utah. NRCS performed an assessment of Dry Creek Debris Basin in 2005. The 2005 assessment concluded that the Dry Creek Debris Basin 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. This debris basin is controlled by the North Utah County Water Conservancy District which is the project sponsor.
The NRCS has completed the Final Supplemental Watershed Plan-Environmental Assessment (Final Plan-EA) describing the proposed rehabilitation of the Dry Creek Debris Basin. The Final Plan-EA presents the alternatives analyzed, potential impacts to the environment, and the Preferred Alternative for the project.
The NRCS Utah State Conservationist has decided that a Finding of No Significant Impact is approved for the Preferred Alternative (Dam Rehabilitation Alternative).
Norm Evenstad – NRCS
125 S. State Street – Room 4010
Salt Lake City, UT 84138-1100
Utah Division of Water Rights Dam Safety – Dry Creek Website
Finding of No Significant Impact (PDF, 767 KB)
The public comment period is now closed. The public was invited to comment on the Draft Plan-EA during the specified time period and attend a Draft Plan-EA public open house in January 2015.
Draft Plan - EA (PDF, 63 MB)
NOTE: We will add other directories as we move through the NEPA process.
Updated: April 29, 2015