Wallowa Falls Hydroelectric Project FERC Project No. P-308 Study Progress Report (Draft Technical Report) Terrestrial December 2012 Prepared by: PacifiCorp Energy Hydro Resources 825 NE Multnomah, Suite 1500 Portland, OR 97232 For Public Review TABLE OF CONTENTS 1.0 INTRODUCTION .............................................................................................................. 1 2.0 PROJECT AREA ................................................................................................................ 1 3.0 SPECIAL STATUS PLANT STUDY ................................................................................ 2 3.1 Objectives & Description ............................................................................................................. 2 3.2 Background Information .............................................................................................................. 3 3.3 Methods ........................................................................................................................................ 3 3.3.1 Pre-field Review .................................................................................................................... 3 3.3.2 Field Surveys ......................................................................................................................... 9 3.4 Results .......................................................................................................................................... 9 3.5 Discussion & Conclusions .......................................................................................................... 10 4.0 NOXIOUS WEEK STUDY .............................................................................................. 10 4.1 Study Objectives & Description ................................................................................................. 10 4.2 Background Information ............................................................................................................ 10 4.3 Methods ...................................................................................................................................... 11 4.3.1 Pre-field Review .................................................................................................................. 12 4.3.2 Field Surveys ....................................................................................................................... 20 4.4. Results ....................................................................................................................................... 20 4.5 Discussion & Conclusions .......................................................................................................... 21 5.0 WETLAND AND RIPARIAN STUDY ........................................................................... 21 5.1 Study Objectives & Description ................................................................................................. 21 5.2 Background Information ............................................................................................................ 23 5.3 Methods ...................................................................................................................................... 23 5.3.1 Pre-field Work ..................................................................................................................... 23 5.3.2 Field Surveys ....................................................................................................................... 23 5.3.2.1 Wetland ............................................................................................................................ 24 5.3.2.2 Riparian ............................................................................................................................ 26 5.4 Results .................................................................................................................................... 27 5.5 Discussion & Conclusions ...................................................................................................... 33 Wallowa Falls Hydro Project December 2012 FERC Project No. P-308 Page TOC Study Progress Report - Terrestrial 6.0 VEGETATION COVER STUDY .................................................................................... 34 6.1 Study Objectives & Description ................................................................................................. 34 6.2 Background Information ............................................................................................................ 34 6.3 Methods ...................................................................................................................................... 34 6.3.1 Pre-field Work ..................................................................................................................... 34 6.3.2 Field Surveys ....................................................................................................................... 35 6.4 Results ........................................................................................................................................ 36 6.5 Discussion & Conclusions .......................................................................................................... 37 7.0 WILDLIFE OBSERVATION STUDY ............................................................................ 38 7.1 Study Objectives & Description ................................................................................................. 38 7.2 Background Information ............................................................................................................ 39 7.3 Methods ...................................................................................................................................... 39 7.3.1 Pre-field Review .................................................................................................................. 39 7.3.2 Field Surveys ....................................................................................................................... 39 7.4 Results ........................................................................................................................................ 40 7.5 Discussion & Conclusions .......................................................................................................... 42 8.0 REFERENCES ................................................................................................................. 43 APPENDIX A Wallowa Falls Project Vicinity and Survey Area Map APPENDIX B USDA Forest Service TES Plant Survey Field Form Botanical Survey Map Special Habitat Map Comprehensive Plant Species List APPENDIX C Noxious Weed Priority Areas Map Noxious Weed Plant Occurrence Record Wallowa-Whitman National Forest Survey Route Map Wallowa Falls Hydro Project December 2012 FERC Project No. P-308 Page TOC Study Progress Report - Terrestrial APPENDIX D Riparian Habitat Conservation Areas within the Study Area Map APPENDIX E Vegetation Cover Types within the Study Area Map APPENDIX F Oregon Biodiversity Information Center List of Rare, Threatened and Endangered, Candidate, or Special Status Wildlife Species in Wallowa County Regional Forester’s Special Status Species Lists for Sensitive Vertebrates and Federally Threatened, Endangered, and Proposed (TE&P) Management Indicator Species and Forestwide Standards and Guidelines (USFS 2010) Federally Listed, Proposed, Candidate Species, and Species of Concern under the jurisdiction of the Fish and Wildlife Service which may occur within Wallowa County, Oregon. Wallowa Falls Hydro Project December 2012 FERC Project No. P-308 Page TOC Study Progress Report - Terrestrial 1.0 INTRODUCTION PacifiCorp Energy filed a Notice of Intent (NOI) and the associated Pre-Application Document (PAD) to commence the Federal Energy Regulatory Commission’s (FERC) Integrated Relicensing Process (ILP) of the Wallowa Falls Hydroelectric Project on February 22, 2011 (PacifiCorp 2011). During compilation of the PAD, PacifiCorp found there was limited information on terrestrial species and habitat specific to the Project Area. However, through agency comments on the PAD, review of historical documents, review of applicable and available databases, PacifiCorp was able to identify adequate information to indicate that rare plants, protected wildlife species, and their associated habitats exist within the Project Area. In consideration of available information, PacifiCorp conducted 5 terrestrial resource studies to gain information on the terrestrial resources and potential impacts of the Wallowa Falls Hydroelectric Project to these resources within a defined Study Area that included PacifiCorp and United States Forest Service (USFS) lands within 100-meters of Project facilities. The following is a list of the 5 terrestrial resource studies: • Special Status Plant Study • Noxious Weed Study • Riparian and Wetland Study • Vegetation Cover Type Study • Wildlife Observation Study 2.0 PROJECT AREA The Wallowa Falls Hydroelectric Project is located on the East Fork Wallowa River approximately 11 miles outside of the City of Joseph in Northeastern Oregon. The Project impoundment/forebay lies over 1,600 meters above mean sea level. The Project operates as run-of-river; therefore there is no measurable storage. Water is instead diverted from the forebay into a flow line and penstock to the generating turbine in the Project