PROSPECT NO. 3 HYDROELECTRIC PROJECT FERC PROJECT NO. P-2337 Final License Application for Major Project—Existing Dam Volume III Exhibit E—Environmental Exhibit Appendices December 2016 PROSPECT NO. 3 HYDROELECTRIC PROJECT FERC PROJECT NO. P-2337 Final License Application for Major Project—Existing Dam Volume I: Initial Statement and Exhibits A, B, C, D, F, G, and H* Volume II: Exhibit E* Volume III: Exhibit E Appendices Volume IV: Exhibit F Appendices (CEII)* (*Provided under separate cover) VOLUME III TABLE OF CONTENTS Contents APPENDIX A. EROSION AND SEDIMENT CONTROL PLAN ........................................ 186 APPENDIX B. FISH PASSAGE FACILITIES OPERATIONS AND MAINTENANCE PLAN ....................................................................................................................... 214 APPENDIX C. VEGETATION MANAGEMENT PLAN .................................................... 226 APPENDIX D. HISTORIC PROPERTIES MANAGEMENT PLAN ................................... 270 APPENDIX E. CONSULTATION CONTACT LIST ........................................................... 358 Prospect No. 3 Hydroelectric Project (FERC No. P-2337) December 2016 Final License Application Page iii APPENDIX A. EROSION AND SEDIMENT CONTROL PLAN Prospect No. 3 Hydroelectric Project (FERC No. P-2337) December 2016 Final License Application Page E-186 EROSION & SEDIMENT CONTROL PLAN Prospect No. 3 Hydroelectric Project FERC Project No. P-2337 Prepared by: PacifiCorp Portland, OR August 2016 PacifiCorp Prospect No. 3 Hydroelectric Project Erosion and Sediment Control Plan FERC Project No. P-2337 TABLE OF CONTENTS 1.0 INTRODUCTION .............................................................................................................................. 1 1.1 Purpose of the Plan ............................................................................................................................... 1 1.2 Organization of the Plan ....................................................................................................................... 1 2.0 SITE CHARACTERISITCS ............................................................................................................. 3 2.1 Climate .................................................................................................................................................. 3 2.2 Soils ...................................................................................................................................................... 3 3.0 MANAGEMENT PRIORITIES ........................................................................................................ 7 3.1 Overland Flow Routes .......................................................................................................................... 8 3.2 Roads .................................................................................................................................................... 8 3.3 Dredging ............................................................................................................................................... 9 3.4 Erosion Control During Construction ................................................................................................... 9 4.0 BEST MANAGEMENT PRACTICES AND ACTIONS .............................................................. 10 4.1 Roads .................................................................................................................................................. 10 4.1.1 Roads in Wet Meadows ............................................................................................................ 10 4.1.2 Piped Stream Crossings ............................................................................................................ 11 4.1.3 Road Upgrades .......................................................................................................................... 11 4.1.4 Road Realignment ..................................................................................................................... 12 4.1.5 Road Decommissioning ............................................................................................................ 12 4.1.6 Establishment of Vegetative Buffers ........................................................................................ 12 4.1.7 Drainage Gradients and Features .............................................................................................. 13 4.1.8 Inspection .................................................................................................................................. 16 4.1.9 Maintenance Schedule .............................................................................................................. 16 4.1.10 Resource-Friendly Contracting ................................................................................................. 17 4.1.11 Maintain Drainage Ditches and Sediment Traps ...................................................................... 18 4.1.12 Maintain Dissipation Aprons .................................................................................................... 18 4.1.13 Roadside Vegetation ................................................................................................................. 18 4.1.14 Road Tread Maintenance .......................................................................................................... 19 4.2 Ground-disturbing Activities .............................................................................................................. 20 4.3 Erosion Control and Remediation on Federal Lands .......................................................................... 21 5.0 IMPLEMENTATION APPROACH ............................................................................................... 21 6.0 REFERENCES ................................................................................................................................. 22 August 2016 Page i PacifiCorp Prospect No. 3 Hydroelectric Project Erosion and Sediment Control Plan FERC Project No. P-2337 1.0 INTRODUCTION PacifiCorp owns and operates the 7.2-megawatt (MW) Prospect No. 3 Hydroelectric Project (Project; Federal Energy Regulatory Commission (FERC) Project No. P-2337) located on the South Fork Rogue River, near the community of Prospect in northeastern Jackson County, Oregon. The 376.2-acre Project occupies approximately 52.5 acres of federal lands administered by the U.S. Department of Agriculture (USDA)-Forest Service, High Cascades Ranger District of the Rogue River-Siskiyou National Forest (RR-SNF). The Project primarily consists of a 172-foot-long, 24-foot-high concrete diversion dam; upstream and downstream fish passage facilities; a 15,894-foot-long conduit system, including canal, pipeline, tunnel, and penstock sections; a powerhouse containing one generating unit with a rated capacity of 7,200 kilowatts (kW) operating under 740 feet of static head; and a 6.97-mile-long, 69-kilovolt transmission line. The Project is operated in run-of-river mode with no appreciable storage capacity. A map showing the general location of Project facilities is presented below (Figure 1). 1.1 Purpose of the Plan This plan provides a resource for preventing and controlling erosion at the Project. The plan includes a detailed description of actual site conditions; measures proposed to control erosion, to prevent slope instability, and to minimize the quantity of sediment mobilized from Project operation or maintenance activities; detailed descriptions of control measures; and an implementation schedule for monitoring and maintenance activities. The plan provides additional resources for further development of erosion prevention and control strategies at the Project, as well as for constructing, inspecting and maintaining a range of erosion control measures. 1.2 Organization of the Plan This plan begins with a discussion of the conditions that underlie potential erosion at the Project, providing context for the erosion and sediment control measures that follow. Section 2 reviews the physical characteristics of the area, and Section 3 presents the routine and emergency maintenance activities that can contribute to erosion. Section 4 identifies the facility operations and features that PacifiCorp is prioritizing in its effort to prevent and remediate erosion. Specific erosion control measures that PacifiCorp is already undertaking are addressed in Section 4. With respect to prevalent features such as roads and overland flow routes, this section also touches on the key factors that PacifiCorp will consider when making decisions about where to focus its resources for maximum impact. This plan concludes with a review of Best Management Practices (BMPs) applicable to the sources and types of erosion that may occur at the Project. In recognition of the dynamic nature of facility operations, Section 5 is structured as a guide to BMP selection that will serve as a resource for future project-specific erosion and sediment control plans. August 2016 Page 1 PacifiCorp Prospect No. 3 Hydroelectric Project Erosion and Sediment Control Plan FERC Project No. P-2337 Figure 1. Project Facilities and Vicinity August 2016 Page 2 PacifiCorp Prospect No. 3 Hydroelectric Project Erosion and Sediment Control Plan FERC Project No. P-2337 2.0 SITE CHARACTERISITCS The Project is located primarily on the western slope of the High Cascade Mountains between the South Fork and North