University of Massachusetts Amherst ScholarWorks@UMass Amherst International Conference on Engineering and Ecohydrology for Fish Passage International Conference on Engineering and Ecohydrology for Fish Passage 2017 Jun 21st, 9:45 AM - 10:10 AM Project Award Presentation Follow this and additional works at: http://scholarworks.umass.edu/fishpassage_conference "Project Award Presentation" (2017). International Conference on Engineering and Ecohydrology for Fish Passage. 30. http://scholarworks.umass.edu/fishpassage_conference/2017/june21/30 This Event is brought to you for free and open access by the Fish Passage Community at UMass Amherst at ScholarWorks@UMass Amherst. It has been accepted for inclusion in International Conference on Engineering and Ecohydrology for Fish Passage by an authorized administrator of ScholarWorks@UMass Amherst. For more information, please contact scholarworks@library.umass.edu.
Soda Springs Dam Fish Passage Program North Umpqua Hydroelectric Project, Oregon PacifiCorp Richard Grost, Scott Schevenius, Steve Albertelli (and many more) Resource Coordination Committee (BLM, NMFS, ODFW, ODEQ, OWRD, USFS, USFWS) MWH Americas Clint Smith Stillwater Sciences Dirk Pedersen Meridian Environmental George Gilmour
North Umpqua Hydroelectric Project, Oregon, USA
North Umpqua Hydroelectric Project Western Cascade Mountains, National Forest
North Umpqua Hydroelectric Project Soda Springs - 8 dams, 8 powerhouses, 40 miles of waterway - 194 MW Generation Capacity - built 1946-56, new license in 2003 - required many new fish protection facilities
Soda Springs Fish Passage Program Restores access to most historical habitat (6.6 miles) Spawning habitat improvements Higher flow Toketee Falls Tailrace barriers Log habitat improvements Ladder, screen, spillway modifications
Spawning Habitat below Soda Springs dam
Gravel Augmentation below Soda Springs dam
Spawning Habitat Soda Springs bypass reach
Slide Creek bypass reach, spawning habitat
Soda Springs Tailrace Barrier Preclude adult salmon and steelhead Powerhouse capacity 1,600 cfs Criteria: <1 gap, <1 ft/s velocity Area = 1,600 ft^2 Natural challenges: narrow canyon, bedload and debris
Soda Springs powerhouse pretailrace barrier
Soda Springs powerhouse with tailrace barrier
Soda Springs Tailrace Barrier prior to submersion (1-inch gap aluminum grating, 20 bays, each 10 ft wide)
Hydraulic Evaluation
Hydraulic evaluation water velocity (fps) 3.5 SDS TRB water velocity msmts 7-3-08 (powerhouse 1,400 cfs; bypass 290 cfs) 14 Approach velocity (fps) 3 2.5 2 1.5 1 0.5 a2 a7 b5 c2 c7 approach velocity average Gate opening (inches) 12 10 8 6 Gate opening (inches) 4 0-0.5 2-1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0 Bay #
Soda TRB Baffle Testing
Operational challenges: debris management
TRB Biological Evaluation no injury
Soda Springs Dam Fish Passage Steelhead, Chinook and Coho salmon, Cutthroat, trout, Lamprey Dam 60 ft high, screened flow 1,875 cfs Criteria: Half-Ice-Harbor ladder, 1 ft steps V-screen, <1.75 mm gap, <0.4 ft/s velocity Operational challenges: reservoir fluctuation 14 ft for re-regulation of upstream load following Natural challenges: steep canyon with active landslides, fractured rock, debris
Soda Springs Fish Passage Project 2006: Recon (geotech, aerial, surveys) 2007-10: Design, modeling, permitting 2009-12: Construction employed many local contractors work area flooded out 4 times 2013-15: Major repairs and Upgrades 2014-16: Performance Evaluation 2017-38: O&M, Monitor Results Ladder, screen, spillway modifications
Soda Springs Dam, March 1952
Soda Springs Dam 2004
Soda Springs Dam 2011
Soda Springs Dam 2012
Soda Springs Fish Passage Design
Half-Ice Harbor design, smooth floor and curved turning walls
15 Fish Ladder Exit Gates to account for Reservoir Fluctuation
Fish Ladder Underwater Video Study of Fish Behavior -no delay or injury -
Soda Springs Fish Ladder Video Fish Counting Window
Soda Springs Fish Ladder Annual Upstream Passage Winter Steelhead ~260-330 Summer Steelhead ~60-130 Spring Chinook salmon ~250-650 Coho Salmon ~65-270 Brown Trout ~200-400 Rainbow Trout ~100-300 and, there are still 100 s of fish spawning downstream of the dam, too
Fish Screen for Juvenile Fish Moving Downstream
Fish Return Ramp Varies 14-ft to Account for Reservoir Fluctuation via Ramp - Hopper - Pipe
Fish Return Ramp Varies 14-ft to Account for Reservoir Fluctuation via Ramp - Hopper - Pipe
Evaluated Test Fish vs. Control Mortality Rate 0, Injury Rate <1%
Soda Springs Fish Passage Summary Restores Volitional Access to Most Historical Habitat <1% -injury rate for fry and smolts 6.6 -miles of restored habitat and access 194 MW capacity of low impact hydropower 344 feet of tailrace barrier length (2) 800-1,200 -adult salmon and steelhead passing annually 2038 year that program and monitoring is completed