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Tibble Fork Dam Rehabilitation

 Project Description

The Natural Resources Conservation Service (NRCS) is analyzing alternatives to rehabilitate Tibble Fork Dam located on United States Forest Service Uinta-Wasatch-Cache National Forest property. NRCS performed an assessment of Tibble Fork Dam in 2004. The 2004 assessment concluded that Tibble Fork Dam does not meet current NRCS and Utah State Dam Safety regulations and engineering standards for a high hazard dam (potential “Loss of Life”). The purpose and need of this project is for Tibble Fork Dam to meet current USDA-NRCS and Utah State Dam Safety regulations and current engineering standards. It would also continue to provide current benefits for the primary authorized purposes of flood prevention and sediment retention with secondary benefits of recreation and irrigation water storage.  Stabilizing the existing dam structures would address the risk of loss-of-life and flooding associated with a dam failure because the dam is not meeting current safety criteria.

NEPA Analysis

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 (PL 83-566). 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 project is located within the boundary of the Uinta-Wasatch-Cache National Forest and the United States Forest Service is a cooperating agency.

Current Status

The NRCS has completed the Final Supplemental Watershed Plan-Environmental Assessment (Final Plan-EA) describing the proposed rehabilitation of the Tibble Fork Dam.  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).

Contact Information

For further project information please contact:

Greg Allington – McMillen, LLC
1401 Shoreline Drive
Boise, ID  83702
208.342.4214 phone
208.342.4216 fax
tibblefork@mcmillen-llc.com

or

Norm Evenstad - NRCS
Wallace F. Bennett Federal Building
125 S. State Street – Room 4010
Salt Lake City, UT 84138-1100
Phone: 801-524-4569
Fax: 801-524-4403
tibbleforkdam@mcmillen-llc.com


Project Documents

Finding of No Significant Impact

Tibble Fork Finding of No Significant Impact (PDF, 90 KB)

Final Plan - EA

Tibble Fork EA Final Plan (PDF, 144 MB)

Draft Plan - EA

Tibble Fork Draft Plan EA Total Report (PDF, 114 MB)
Tibble Fork Draft Plan EA Report (PDF, 1.73 MB)
Tibble Fork Draft Plan EA Appendix A (PDF, 576 KB)
Tibble Fork Draft Plan EA Appendix B (PDF, 16.2 MB)
Tibble Fork Draft Plan EA Appendix C (PDF, 13.3 MB)
Tibble Fork Draft Plan EA Appendix D (PDF, 9.05 MB)
Tibble Fork Draft Plan EA Appendix E (PDF, 74 MB)

Other Documents

Scoping