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Home My WebLink About20190919PAC to IIPA Supp 10 Attach OPUC 12.pdfOR - UM 1968 OPUC 12 Attachment OPUC 12 1 of 25 •The energy of falling or flowing water can be harnessed to generate electricity •Hydraulic head is primarily a factor of gravitational force and differences in elevation What is hydroelectric power? OR - UM 1968 OPUC 12 Attachment OPUC 12 2 of 25 •The mechanical energy of water is converted to electrical power by a generator •Water moves the turbine, which rotates the rotor •Movement of the rotor past the stator creates a changing magnetic field inducing an electric current Hydroelectric generator OR - UM 1968 OPUC 12 Attachment OPUC 12 3 of 25 Penstock Powerhouse (turbine) Tailrace Transmission Line Impoundment (Reservoir) Waterway (e.g., Canal) Diversion Dam Bypass Reach (of river) Spillway & SluicewayFish Ladder Sub-station River OR - UM 1968 OPUC 12 Attachment OPUC 12 4 of 25 North Umpqua Hydroelectric Project •North Umpqua River, Clearwater River, Fish Creek •8 dams, 10 turbines, 44 miles of waterway (and roads) •3 reservoirs, 5 impoundments, 5 forebay ponds •Crew of 29 Full Time Employees •Operations & Maintenance •Compliance & Engineering •Management & Administration •On-site housing, standby and on-call duty •Clearwater Village •Toketee Village •3 Remote Outposts •Entirely on Umpqua National Forest OR - UM 1968 OPUC 12 Attachment OPUC 12 5 of 25 OR - UM 1968 OPUC 12 Attachment OPUC 12 6 of 25 OR - UM 1968 OPUC 12 Attachment OPUC 12 7 of 25 •Built between 1946 and 1956 •8 dams and 8 powerhouses with 10 generating units •Consistent spring flows provide water fuel •2,460 feet of elevation change (head) provides energy •Generating capacity of 194 megawatts (MW) •Average generation of about 100 MW, which is enough to power approximately 79,600 homes (Numbers from Northwest Power and Conservation Council, 2019) •Generation load shaping allows the Project to respond to variable customer demand (e.g., higher electricity use during the day) by using Project reservoirs and forebays to store and release water North Umpqua Hydroelectric Project History & Operation OR - UM 1968 OPUC 12 Attachment OPUC 12 8 of 25 9 Daytime Operation •Higher generation •Water released from Lemolo Reservoir •Water stored in Soda Springs Reservoir OR - UM 1968 OPUC 12 Attachment OPUC 12 9 of 25 10 Nighttime Operation •Lower generation •Water stored in Lemolo Reservoir •Water released from Soda Springs OR - UM 1968 OPUC 12 Attachment OPUC 12 10 of 25 Soda Springs Reservoir allows for load following and natural flows to the Wild and Scenic Reach of the river OR - UM 1968 OPUC 12 Attachment OPUC 12 11 of 25 •1947: Original 50-year FERC license •1970s-80s: New laws including Federal Power Act, National Environmental Policy Act (NEPA), and Endangered Species Act (ESA) •Early 1990s: Relicensing studies, meetings, and application •1997: License expiration and annual renewals •1996-1998: Watershed Analysis conducted by Forest Service •2001: Settlement Agreement, Resource Coordination Committee (RCC) forms, and work begins on new projects •RCC comprised of BLM, FS, FWS, NOAA Fisheries, ODEQ, ODFW, OWRD, and PacifiCorp •2003: New license issued for 35 years North Umpqua Hydroelectric Project Relicensing OR - UM 1968 OPUC 12 Attachment OPUC 12 12 of 25 •Fluvial geomorphic processes •Aquatic and riparian habitat connectivity •In-stream flows •Reservoir and forebay management •Water quality •Anadromous fish passage and off-site mitigation •Terrestrial species connectivity and wildlife entrapment These goals are accomplished through the Protection, Mitigation, and Enhancement (PM&E) Measures of the license and Settlement Agreement …all while providing low-impact, affordable, and renewable power Management Goals of the Settlement Agreement OR - UM 1968 OPUC 12 Attachment OPUC 12 13 of 25 OR - UM 1968 OPUC 12 Attachment OPUC 12 14 of 25 •Aquatic Connectivity •Riparian Restoration (Potter Creek, White Mule Creek) •Aquatic reconnections (64 sites) •Wildlife Crossings (68 canal bridges, 5 penstock overpasses, 4 penstock underpasses) •Wetland Enhancement Sites (8 locations) •Resource Management Plans •Avian Protection Plan •Vegetation Management Plan (Noxious weed survey, treatment and control; revegetation) •Erosion and Sediment Control Plan •Transportation Management Plan •Aesthetics Management Plan •Recreation Management Plan •Historic Properties Management Plan Terrestrial Resources and Management Plans OR - UM 1968 OPUC 12 Attachment OPUC 12 15 of 25 •Habitat Enhancements •River Flows (higher, more natural) •Spawning Habitat (Soda Springs, Slide Cr bypass) •Gravel Augmentation (below Soda Springs) •New Fish Passage and Protection Facilities •Fish ladders (Soda Springs, Lemolo 2 dams) •Fish Screens (Soda Springs, Fish Cr, Toketee dams) •Tailrace barriers (Soda Springs, Slide Cr powerhouses) •New Culverts (Velvet, Cedar Springs creeks) •Other passage (Clearwater Reconnect) •Other –State, Federal, RCC mitigation funds •Development of native rainbow trout broodstock •Performance Evaluations •Monitoring Aquatic Resources OR - UM 1968 OPUC 12 Attachment OPUC 12 16 of 25 Spawning Habitat Creation Soda Springs Bypassed Reach OR - UM 1968 OPUC 12 Attachment OPUC 12 17 of 25 12/01/14 12/22/14 03/16/15 09/02/15 OR - UM 1968 OPUC 12 Attachment OPUC 12 18 of 25 Soda Springs Fish Passage Project Toketee Falls Ladder, screen, and spillway modifications •2006: Recon (geotechnical, topographical, and aerial) •2007-2010: Design, modeling, and permitting •2009-2013: Construction •Local contractors including Todd Construction, Weekly Bros., Sims Electric, Convey-Keystone, Umpqua Sand & Gravel, Caldwell Construction, et al. •2014-2016: Performance Evaluation •2014-2038: Monitor fish numbers OR - UM 1968 OPUC 12 Attachment OPUC 12 19 of 25 Soda Springs Tailrace Barrier As-built in 2007 OR - UM 1968 OPUC 12 Attachment OPUC 12 20 of 25 Slide Creek Tailrace Barrier As-built in 2011 OR - UM 1968 OPUC 12 Attachment OPUC 12 21 of 25 Soda Springs Fish Passage Design Water Flow Upstream Fish Downstream Fish North Intake Spillway & Log Chute OR - UM 1968 OPUC 12 Attachment OPUC 12 22 of 25 Soda Springs Fish Ladder Annual Upstream Passage (2013 to present) •Winter Steelhead: ~260-350 •Summer Steelhead: ~60-150 •Spring Chinook Salmon: ~230-650 •Coho Salmon: ~65-270 •Brown Trout: ~200-400 •Rainbow Trout: ~100-300 …and there are still hundreds of fish spawning downstream of the dam, too! OR - UM 1968 OPUC 12 Attachment OPUC 12 23 of 25 OR - UM 1968 OPUC 12 Attachment OPUC 12 24 of 25 OR - UM 1968 OPUC 12 Attachment OPUC 12 25 of 25