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Wallowa Falls Hydroelectric Project FERC No. P-308

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Wallowa Falls Hydroelectric Project FERC No. P-308 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________ Wallowa Falls Hydroelectric Project FERC No. P-308 Preliminary Licensing Proposal October 2013 1 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________ Wallowa Falls Hydroelectric Project FERC No. P-308 Preliminary Licensing Proposal Prepared by: PacifiCorp Energy Hydro Resources 825 NE Multnomah, Suite 1500 Portland, OR 97232 2 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________ Table of Contents 1.0 INTRODUCTION ........................................................................... 11 1.1 Purpose of the Preliminary Licensing Proposal .......................................... 11 1.2 Process Plan and Schedule .................................................................... 13 1.3 Public Review and Comment .................................................................. 16 2.0 PROPOSED ACTION AND ALTERNATIVES ......................................... 17 2.1 No-action Alternative ............................................................................ 17 2.1.1 Existing Project Facilities ...................................................................... 17 2.1.2 Project Safety ................................................................................... 21 2.1.3 Existing Project Operation ..................................................................... 21 2.1.4 Existing Environmental Measures ............................................................. 23 2.2 Applicants Proposal .............................................................................. 25 2.2.1 Proposed Project Facilities .................................................................... 25 2.2.2 Proposed Project Operation ................................................................... 26 2.2.3 Proposed Environmental Measures ............................................................ 26 2.2.3.1 Construction ........................................................................ 26 2.2.3.2 Operation ........................................................................... 28 2.2.3.3 Geology, Sediment and Substrate .................................................. 28 2.2.3.4 Water Resources ................................................................... 28 2.2.3.5 Fish and Aquatic Resources ....................................................... 29 2.2.3.6 Wildlife and Terrestrial Resources ................................................ 29 2.2.3.7 Recreation Resources .............................................................. 30 2.2.3.8 Aesthetic and Visual Resources .................................................... 31 2.2.3.9 Cultural Resources ................................................................. 32 2.2.4 Modifications to Applicants’s Proposal – Mandatory Conditions ............................ 33 3.0 ENVIRONMENTAL ANALYSIS .......................................................... 33 3.1 General Description of the River Basin .................................................... 33 3.2 Cumulative Effects ............................................................................... 34 3.2.1 Resources that Could Be Cumulatively Affected .............................................. 34 3.2.2 Geographic Scope .............................................................................. 34 3.2.3 Temporal Scope ................................................................................ 34 3.2.4 Discussion of Past Present and Future Actions ............................................... 34 3.3 Proposed Action and Action Alternatives .................................................. 35 3.3.1 Geology, Sediment and Substrate .............................................................. 35 3.3.1.1 Environmental Effects .............................................................. 41 3.3.2 Water Resources ................................................................................ 47 3.3.2.1 Environmental Effects .............................................................. 51 3.3.3 Aquatic Resources .............................................................................. 56 3.3.3.1 Environmental Effects .............................................................. 60 3.3.4 Terrestrial Resources .......................................................................... 67 3.3.4.1 Environmental Effects .............................................................. 74 3.3.5 Threatened and Endangered Species ......................................................... 79 3.3.6 Recreation and Land Use ...................................................................... 79 3.3.6.1 Environmental Effects .............................................................. 89 3 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________ 3.3.7 Aesthetic and Visual Resources ................................................................ 96 3.3.7.1 Environmental Effects .............................................................. 98 3.3.8 Cultural Resources ............................................................................ 101 3.3.8.1 Environmental Effects ............................................................. 113 4.0 LITERATURE CITED .................................................................... 114 4 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________ List of Figures Figure 1. Location of the Wallowa Falls Hydroelectric Project, FERC No. 308, Oregon ........................................ 12 Figure 2. Grain size distribution in the Project forebay, August, 2012. ................................................................ 37 Figure 3. Project forebay and East Fork Wallowa River substrate particle size distributions (cumulative percent per size class) ........................................................................................................................................................ 38 Figure 4. Map of the Cultural Resources APE plotted on USGS Joseph 7.5’ series quadrangle. ......................... 109 Figure 5. Map of the APE for Visual and Indirect Effects plotted on USGS Joseph 7.5’ series quadrangle. ........ 110 5 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________ List of Tables Table 1. Pre filing Schedule and Milestones for the Integrated Licensing Process for Wallowa Falls. ................. 14 Table 2. Wallowa Falls Post‐filing Schedule and Milestones for Integrated Licensing Process ............................ 15 Table 3. Size classifications for sediment samples collected in the Project Forebay, August 14, 2012. ............... 36 Table 4. Metals content in sediment samples collected at Wallowa Falls Hydroelectric project forebay, August 2012. ND=non‐detect, RL=reporting limit; all values mg/kg. ............................................................................... 38 Table 5. Noxious Weeds Identified within the Study Area .................................................................................... 69 Table 6. Riparian Habitat Conservation Acre Standard Widths to Waterbodies within the Wallowa Falls Hydroelectric Project Study Area .......................................................................................................................... 70 Table 7. Plant Association Group Types and Acres within the Study Area. .......................................................... 72 Table 8. Species Detected within the Study Area .................................................................................................. 73 Table 9. Federal Endangered Species Act Listing Status ....................................................................................... 79 Table 10. Recreation Facilities in the Study Area .................................................................................................. 82 Table 11. Number of Campsites Reserved at Pacific Park Campground ............................................................... 85 Table 12. Form 80 Recreation Report Data: Overnight Stays at Pacific Park Campground ................................. 86 Table 13. 2012 Winter Recreational Use of the Forebay Access Road ................................................................. 87 Table 14. Summer and Fall Use of the “Main” User‐Created Trail West of Pacific Park Campground. ................ 87 Table 15. 2008 to 2012 Traffic Counts Near Wallowa Lake State Park Maintenance Facility—Location 2. ........ 88 Table 16. Historic Resources identified within the APE ....................................................................................... 111 6 Wallowa Falls Hydroelectric Project (FERC No. P-308) Preliminary License Proposal October 2013 _______________________________________________________________________________________________
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