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reservoir level is considerably lower and the warmer water from the surface enters the intakes and makes the river downstream unnaturally warm which causes salmon eggs to hatch several months too early. In order to help control the temperature of water discharged below the dam, the original intake tower was modified by adding a 302-foot (92 m) tall wet well. The wet well has three adjustable gates at various levels so that different temperature water can be mixed in the wet well to a desired temperature. The mixed water enters the existing regulating and penstock intakes. By controlling the temperature of the water released from the dam, the impacts on the McKenzie River are greatly reduced.
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the units to operate at heads between 400 and 438 feet (122 and 134 m) one third of the time and at heads between 270 and 310 feet (82 and 94 m) one fifth of the time. In 2002, the Corps began lowering the level of the reservoir for the construction of a temperature control facility. The reservoir level was lowered to an elevation below the turbine intakes, which put the powerhouse out of service and provided an opportunity to overhaul the turbine-generator units.
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310:. By 2000, the replacement runners were again experiencing cavitation problems and in need of repair. Repair of the runners would prove to be difficult because the runner blades are thin, making them difficult to weld, and the spacing between the blades is small which gives limited access to the damaged area.
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rewind, and disassembly and reassembly of the units. The problems with the runners for the turbines at Cougar powerhouse are associated with the cycle of large head changes of the Cougar
Reservoir. Since Cougar Reservoir is built for flood control, the levels of the reservoir vary greatly, causing
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for the powerhouse and regulating outlet were deep and pulled water from the bottom of the reservoir which is much colder than the surface water. During the spring and summer, the release of unnaturally cold water into the McKenzie River reduces salmon migration and productivity. In the fall, the
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realized that a state-of-the-art runner design was required and devised a turbine-generator rehabilitation program. Due to the technical challenges associated with the program, the Corps chose a best value procurement method for this project. In 2003, the contract was awarded to
General Electric
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The runners from the two turbines in the Cougar powerhouse experienced significant cavitation damage during operation and by the 1980s they were in need of repair and had to be taken out of service four times a year for inspections and repair. In 1987, the U.S. Army Corps of
Engineers installed
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In 2005, the
Willamette temperature control facility was constructed to help regulate the water temperature released to the river below Cougar Dam in an attempt to reduce the negative effects on salmon migration. To further help recover threatened
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to control flooding, and since the completion of the dam, it is estimated that it prevented approximately $ 452 million in potential flood damages. The dam consists of a rock-fill embankment approximately 1,500 feet (460 m) long, a
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When the Cougar Dam was originally constructed, it contained adult and juvenile fish passage facilities that helped fish move past the dam. However, fish no longer migrated to the facility, and it became ineffective.
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decided to construct a new collection and sorting facility to collect, sort, and transport fish upstream and downstream of the dam. The new facility would cost $ 14.7 million and include a
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259:, an emergency spillway capable of a capacity of 76,140 cu ft/s (2,156 m/s), a regulating outlet, and a diversion tunnel. The diversion tunnel was built to divert the
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constructed a fish collection and sorting facility on the South Fork McKenzie River below Cougar Dam which was completed in 2010. From 2003 to 2005, state-of-the-art
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will be loaded on trucks and released into high-quality habitats above Cougar Dam in an effort to recover threatened salmon and bull trout populations.
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Cougar Dam was completed in 1963 at a cost of $ 54.2 million and the two turbine units were completed in 1964. Cougar Dam operates in coordination with
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and the project was completed in March 2005. The project included physical model testing, new turbine runners, a major turbine overhaul, a
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during the construction of Cougar Dam, and the tunnel was later closed with a concrete plug once the construction of the dam was complete.
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214:, hydropower, water quality improvement, irrigation, fish and wildlife habitat, recreation, storage, and navigation.
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591:"5-Year Review: Summary & Evaluation of Upper Willamette River Steelhead and Upper Willamette River Chinook"
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which has a storage capacity of 219,000 acre-feet (270,000,000 m). The purpose of Cougar Dam is to provide
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642:"Design of a Multi-Level Intake for Temperature Control featuring a Lake Tap at Cougar Dam, Vida, Oregon"
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were installed in the turbine-generator units at the Cougar powerhouse, and were designed to resist
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561:"Corps Completes Cougar Dam Fish Collection Facility To Aid McKenzie River Salmon, Bull Trout"
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424:. Department of Civil and Environmental Engineering, Stanford University. Archived from
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and a powerhouse with two turbines totaling 25 megawatts of electric power.
683:"Cougar Reservoir Water Temperature Control and Upstream Passage Project"
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Bird, Brad; Stephen J. Schlenker; Nathan T. Higa (October 8, 2003).
567:. Intermountain Communications. August 27, 2010. Archived from
470:. HCI Publications, Inc., a division of PennWell Corporation
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685:. Oregon Department of Fish and Wildlife. Archived from
596:. National Oceanic and Atmospheric Administration. 2011
615:"Species Profile-Bull Trout (Salvelinus confluentus)"
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G. Charles Allen Jr., U.S. Army Corps of
Engineers.
238:and operate efficiently at very large head ranges.
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530:. Bonneville Power Administration. Archived from
464:"Seeking Best Value During Equipment Procurement"
226:populations, in the Willamette River Basin, the
746:Buildings and structures in Lane County, Oregon
647:. U.S. Army Corps of Engineers. Archived from
422:National Performance of Dams Project Directory
8:
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751:United States Army Corps of Engineers dams
306:replacement runners that were designed by
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183:is a 519-foot (158 m) tall rockfill
761:Energy infrastructure completed in 1964
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741:Hydroelectric power plants in Oregon
308:Voith Siemens Hydro Power Generation
280:Fish collection and sorting facility
202:about 42 miles (68 km) east of
709:"The Projectwise Project Showcase"
14:
156:219,000 acre-feet (0.270 km)
617:. U.S. Fish and Wildlife Service
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312:The U.S. Army Corps of Engineers
166:210 square miles (544 km)
1:
766:1964 establishments in Oregon
228:U.S. Army Corps of Engineers
287:The Army Corps of Engineers
191:. It has a gated concrete
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499:"Cougar Dam and Reservoir"
267:Temperature control tower
261:South Fork McKenzie River
200:South Fork McKenzie River
174:1,280 acres (520 ha)
116:South Fork McKenzie River
26:
711:. Bentley Systems. 2011
565:Columbia Basin Bulletin
386:List of lakes in Oregon
378:Renewable energy portal
301:Replacement of turbines
133:1,600 feet (488 m)
756:Dams completed in 1964
75:44.12889°N 122.24028°W
212:flood risk management
198:The dam impounds the
187:in the U.S. state of
125:519 feet (158 m)
80:44.12889; -122.24028
162:Catchment area
153:Total capacity
71: /
16:Dam in Oregon, U.S.
689:on August 23, 2011
571:on October 8, 2011
185:hydroelectric dam
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171:Surface area
107:Dam and spillways
91:Opening date
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771:Rock-filled dams
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147:Cougar Reservoir
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220:chinook salmon
204:Eugene, Oregon
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713:. Retrieved
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691:. Retrieved
687:the original
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649:the original
619:. Retrieved
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598:. Retrieved
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573:. Retrieved
569:the original
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536:. Retrieved
532:the original
528:"Cougar Dam"
507:. Retrieved
503:the original
472:. Retrieved
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430:. Retrieved
426:the original
421:
418:"Cougar Dam"
364:Water portal
304:
283:
270:
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197:
180:
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468:Hydro World
291:fish ladder
206:, creating
99:Operator(s)
78: /
66:122°14′25″W
54:Coordinates
43:Lane County
33:Aerial view
730:Categories
621:2013-12-05
600:2013-12-03
392:References
295:bull trout
242:Background
236:cavitation
224:bull trout
181:Cougar Dam
22:Cougar Dam
329:generator
315:Hydro of
138:Reservoir
63:44°7′44″N
336:See also
317:Montreal
253:penstock
193:spillway
112:Impounds
39:Location
273:intakes
143:Creates
715:May 9,
693:May 9,
658:May 9,
575:May 9,
538:May 9,
509:May 9,
474:May 9,
432:May 9,
325:Canada
321:Quebec
189:Oregon
130:Length
122:Height
49:, U.S.
47:Oregon
652:(PDF)
645:(PDF)
594:(PDF)
102:Cenwp
717:2011
695:2011
660:2011
577:2011
540:2011
511:2011
476:2011
434:2011
222:and
94:1964
732::
668:^
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719:.
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
