Application for Low Impact Hydropower Institute Recertification Prospect No. 3 Hydroelectric Project (FERC No. P-2337; LIHI Certificate No. 109) Jackson County, Oregon Prepared by: PacifiCorp 925 South Grape Street, Building 5 Medford, OR 97501 February 2020 Application for LIHI Recertification Prospect No. 3 Hydroelectric Project (Certificate No. 109) TABLE OF CONTENTS TABLE OF CONTENTS ........................................................................................................... II LIST OF FIGURES ................................................................................................................... IV LIST OF TABLES ..................................................................................................................... IV ACRONYMS AND ABBREVIATIONS .................................................................................. VI 1.0 PROJECT DESCRIPTION .................................................................................................. 1 1.1 PROJECT FACILITIES .............................................................................................. 1 1.1.1 South Fork Diversion Dam ........................................................................... 8 1.1.2 South Fork Impoundment ............................................................................. 8 1.1.3 Fish Passage Facilities .................................................................................. 8 1.1.4 Proposed Auxiliary Minimum Flow Release System ................................. 10 1.1.5 Conduit System ........................................................................................... 10 1.1.6 Powerhouse ................................................................................................. 11 1.1.7 Tailrace ....................................................................................................... 11 1.1.8 Inverted Siphon (Sag-Pipe) ......................................................................... 11 1.1.9 Project Water Discharge ............................................................................. 12 1.2 PROJECT HISTORY ................................................................................................ 12 1.2.1 Construction History ................................................................................... 12 1.2.2 Compliance History .................................................................................... 15 1.3 PROJECT OPERATIONS ......................................................................................... 15 1.4 PROJECT WATERSHED ......................................................................................... 16 1.5 ZONES OF EFFECT ................................................................................................. 17 1.6 CHANGES SINCE LAST CERTIFICATION .......................................................... 19 2.0 CERTIFICATION STANDARDS ..................................................................................... 24 2.1 CRITERION A - ECOLOGICAL FLOW REGIMES............................................... 25 2.1.1 ZOE 1: Project Facilities ............................................................................. 26 2.1.2 ZOE 2: Bypassed Reach ............................................................................. 26 2.1.3 ZOE 3: North Fork Reservoir ..................................................................... 32 2.2 CRITERION B - WATER QUALITY ...................................................................... 32 2.2.1 ZOE 1: Project Facilities ............................................................................. 33 2.2.2 ZOE 2: Bypassed Reach ............................................................................. 33 2.2.3 ZOE 3: North Fork Reservoir ..................................................................... 35 2.3 CRITERION C - UPSTREAM FISH PASSAGE ..................................................... 36 2.3.1 ZOE 1: Project Facilities ............................................................................. 36 2.3.2 ZOE 2: Bypassed Reach ............................................................................. 36 2.3.3 ZOE 3: North Fork Reservoir ..................................................................... 40 2.4 CRITERION D - DOWNSTREAM FISH PASSAGE AND PROTECTION .......... 41 2.4.1 ZOE 1: Project Facilities ............................................................................. 41 2.4.2 ZOE 2: Bypassed Reach ............................................................................. 43 2.4.3 ZOE 3: North Fork Reservoir ..................................................................... 43 2.5 CRITERION E – SHORELINE AND WATERSHED PROTECTION ................... 43 2.5.1 ZOE 1: Project Facilities ............................................................................. 44 2.5.2 ZOE 2: Project Bypassed Reach ................................................................. 44 February 2020 Page ii Application for LIHI Recertification Prospect No. 3 Hydroelectric Project (Certificate No. 109) 2.5.3 ZOE 3: North Fork Reservoir ..................................................................... 45 2.6 CRITERION F - THREATENED AND ENDANGERED SPECIES PROTECTION .............................................................................................................................. 45 2.6.1 ZOE 1: Project Facilities ............................................................................. 45 2.6.2 ZOE 2: Bypassed Reach ............................................................................. 46 2.6.3 ZOE 3: North Fork Reservoir ..................................................................... 46 2.7 CRITERION G - CULTURAL AND HISTORIC RESOURCE PROTECTION ..... 46 2.7.1 ZOE 1: Project Facilities ............................................................................. 47 2.7.2 ZOE 2: Bypassed Reach ............................................................................. 47 2.7.3 ZOE 3: North Fork Reservoir ..................................................................... 47 2.8 CRITERION H - RECREATIONAL RESOURCES ................................................ 47 2.8.1 ZOE 1: Project Facilities ............................................................................. 48 2.8.2 ZOE 2: Bypassed Reach ............................................................................. 48 2.8.3 ZOE 3: North Fork Reservoir ..................................................................... 49 3.0 SWORN STATEMENT AND WAIVER ........................................................................... 50 4.0 CONTACTS ......................................................................................................................... 51 5.0 REFERENCES ..................................................................................................................... 53 APPENDIX A: PROJECT MAPS ............................................................................................ 55 APPENDIX B: PROJECT PHOTOS ...................................................................................... 61 February 2020 Page iii Application for LIHI Recertification Prospect No. 3 Hydroelectric Project (Certificate No. 109) LIST OF FIGURES Figure 1. Project facilities and vicinity map ....................................................................................9 Figure 2. Project location and watersheds .....................................................................................18 Figure 3. Zones of effect conceptual flowchart .............................................................................20 Figure 4. Aerial overview of zones of effect .................................................................................21 Figure 5. ZOE 1: Project facilities aerial map ...............................................................................22 Figure 6. ZOE 3: North Fork Reservoir .........................................................................................23 Figure 7. Normalized (% of maximum) AWS curve for trout species' life stages in the upper bypassed reach ........................................................................................................28 LIST OF TABLES Table 1. Project facilities (LIHI Table B-1.1.) .................................................................................1 Table 2. Project construction history .............................................................................................14 Table 3. Alternative standards matrix for ZOE 1: Project Facilities .............................................24 Table 4. Alternative standards matrix for ZOE 2: Bypassed Reach ..............................................25 Table 5. Alternative standards matrix for ZOE 3: North Fork Reservoir ......................................25 Table 6. Ecological flow regime alternative standards matrix ......................................................25 Table 7. Water quality alternative standards matrix ......................................................................33 Table 8. Upstream fish passage alternative standards matrix ........................................................36 Table 9. Downstream fish passage and protection alternative standards matrix ...........................41 Table 10. Shoreline and watershed protection alternative standards matrix .................................43 Table 11. Threatened and endangered species protection alternative