AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 06/04/2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 • • Project Background FERC and Planning Process Stream Assessment Methods Site Conditions and Functional Attributes Stream Restoration Design Process Example Treatments Summary YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY MT, 2019 PROJECT BACKGROUND This Project is in the Yellowstone River… But… NOT Located in Yellowstone National Park NOT in Montana Ashley National Forest Duchesne County, Utah YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 PROJECT BACKGROUND YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 FERC AND PLANNING PROCESS • Federal Energy Regulatory Commission Surrender of License • Dam and Public Safety • Environmental Resources • Licensee is responsible for restoration if project is on federal lands • NEPA Environmental Assessment • NHPA Class III Cultural Resources Survey YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 SITE ASSESSMENT METHODS • Topographic Survey – Reservoir Bathymetry – Floodplain, Springs, Wetlands – Roadway and Campground – Diversion and Penstock • Geomorphic Survey – Cross sections – Longitudinal Profiles – Bank Stability – Large Wood – Sediment Gradation • Reservoir Sediments – Several Core Samples – Laboratory Testing (chemical and physical) Aquatic Surveys Biological Surveys Cultural Surveys • • • YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 SITE CONDITIONS AND FUNCTIONAL ATTRIBUTES YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 • • Brown Trout Brook Trout Rainbow Trout Cutthroat Trout Mountain Sucker Mountain Whitefish Mottled Sculpin YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 REFERENCE CONDITIONS Stream Parameter Reference Conditions 60% Main Channel Design 60% Side Channel Design 20 Average bankfull cross-sectional area (Abkf) 135 125 0. 021 Reach slope (feet/feet) 0. 021 0. 017 22. 4 Average riffle bankfull width (Wbkf) 62. 1 64. 2 0. 90 Average riffle bankfull depth (Dbkf) 2. 23 1. 95 25 Width/depth ratio (Wbfk/Dbkf) 27. 5 33 Average riffle length (feet) 118. 5 120 Average riffle slope (feet/feet) 0. 04 0. 065 Average pool spacing (feet) 289 331 Average max pool depth (feet) 5. 2 5. 4 Average pool length (feet) 168 173 Sinuosity (feet/feet) 1. 14 1. 11 190– 338 160– 208 46 0. 043 98 2. 5 51 1. 1 95– 111 Radius of curvature range (feet) PRESENTATION TITLE HERE

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 DESIGN CONSIDERATIONS • Bankfull velocity <5 fps • No drops more than 0. 5 fps • Pool depths min. 3’ at base flow. YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 DESIGN CONSIDERATIONS • Wetland Fringe Habitats at Mouth of Reservoir • Historic Side Channel Habitats YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 PRESENTATION TITLE HERE

AMERICAN SOCIETY OF MINING AND RECLAMATION BIG SKY, MT JUNE 4 2019 BANK STABILIZATION STRUCTURES • Wood toe • J-hook YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 BANK STABILIZATION STRUCTURES YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 GRADE CONTROL STRUCTURES • • Boulder Constructed Riffle Boulder Cross Vane with Step (A-Structure) Log Riffles Boulder Cluster YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 GRADE CONTROL STRUCTURES • Boulder Constructed Riffle YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 GRADE CONTROL STRUCTURES • Boulder A-Structure YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 SIDE CHANNEL GRADE CONTROL STRUCTURES • Log Riffles YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 HABITAT FEATURES • • Boulder Clusters Floodplain Roughness Features On-shore Boulder/log Clusters Robust Planting Plan YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

QUESTIONS?

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 STREAM RESTORATION YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH

AMERICAN FISHERIES SOCIETY – CO/WY CHAPTER ANNUAL MEETING FEB 26 -28 2019 YELLOWSTONE HYDROELECTRIC DECOMMISSIONING PROJECT DUCHESNE COUNTY, UTAH