The dam provides for slackwater navigation, hydroelectric power generation, recreation, wildlife habitat, and incidental irrigation.
Water spilling at McNary Dam, seen from the Washington shore in July 2013.
Bills for the construction of a dam were introduced in the United States Congress as early as 1931.[4] The United States House of Representatives rivers and harbors committee initially approved the project in April 1941; navigation, power generation, and national security were the major reasons cited for construction of the dam.[5] Construction began in 1947, and was completed in 1954. Activation of all generating units was completed in 1957. Its capacity is 980 MW. There are two fish ladders for salmon and steelhead passage, one on each shore of the dam. The Washington side also has an 86-foot (26 m) wide, 683 foot (208 m) long navigation lock that lifts boats an average of 75 feet (23 m). The dam flooded the Umatilla Rapids, forming a reservoir called Lake Wallula. The lake extends 64 miles (103 km) up the Columbia to the US DOEHanford Site. It also extends up the Snake River to the Ice Harbor Dam.
As with some other dams, it has two additional turbines whose purpose is to power the dam itself. That is, this dam is entirely self-sustaining. In the event of a large-scale grid outage, McNary would provide the black start capability necessary to restart other generation facilities. These two "station service" turbines are only capable of providing about three MW, compared to the 70 MW each of the other 14 turbines. These two turbines alternate service duty to provide the dam with its energy requirements.
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McNary Lock and Dam – Walla Walla District – U.S. Army Corps of Engineers
February 24, 2023
mcnary, mile, long, concrete, gravity, river, which, spans, columbia, river, joins, umatilla, county, oregon, with, benton, county, washington, miles, upriver, from, mouth, columbia, operated, army, corps, engineers, mcnary, lock, office, located, mile, east, . McNary Dam is a 1 4 mile 2 2 km long concrete gravity run of the river dam which spans the Columbia River It joins Umatilla County Oregon with Benton County Washington 292 miles 470 km upriver from the mouth of the Columbia 3 It is operated by the U S Army Corps of Engineers McNary Lock and Dam office The dam is located a mile 2 km east of the town of Umatilla Oregon and 8 miles 13 km north of Hermiston Oregon The dam was originally planned to be named Umatilla Dam but the Flood Control Act of 1945 renamed the dam in honor of Senator Charles L McNary of Oregon who had died the previous year McNary DamSpillway view from the southwest Oregon side of the Columbia RiverLocationBenton County Washington Umatilla County Oregon USACoordinates45 55 47 N 119 17 46 W 45 92972 N 119 29611 W 45 92972 119 29611 Coordinates 45 55 47 N 119 17 46 W 45 92972 N 119 29611 W 45 92972 119 29611Construction began1947Opening date1954Operator s U S Army Corps of Engineers Operator Dam and spillwaysType of damConcrete gravity run of the riverImpoundsColumbia RiverHeight183 feet 56 m Length7 365 feet 2 245 m Spillway typeService gate controlledReservoirCreatesLake WallulaTotal capacity1 350 000 acre ft 1 67 km3 Power StationCommission date1954 1957Turbines14Installed capacity1 127 MWAnnual generation5 170 GWh 1 2 The dam provides for slackwater navigation hydroelectric power generation recreation wildlife habitat and incidental irrigation Water spilling at McNary Dam seen from the Washington shore in July 2013 Bills for the construction of a dam were introduced in the United States Congress as early as 1931 4 The United States House of Representatives rivers and harbors committee initially approved the project in April 1941 navigation power generation and national security were the major reasons cited for construction of the dam 5 Construction began in 1947 and was completed in 1954 Activation of all generating units was completed in 1957 Its capacity is 980 MW There are two fish ladders for salmon and steelhead passage one on each shore of the dam The Washington side also has an 86 foot 26 m wide 683 foot 208 m long navigation lock that lifts boats an average of 75 feet 23 m The dam flooded the Umatilla Rapids forming a reservoir called Lake Wallula The lake extends 64 miles 103 km up the Columbia to the US DOE Hanford Site It also extends up the Snake River to the Ice Harbor Dam As with some other dams it has two additional turbines whose purpose is to power the dam itself That is this dam is entirely self sustaining In the event of a large scale grid outage McNary would provide the black start capability necessary to restart other generation facilities These two station service turbines are only capable of providing about three MW compared to the 70 MW each of the other 14 turbines These two turbines alternate service duty to provide the dam with its energy requirements McNary Dam is part of the Columbia River Basin system of dams Stats Altitude 344 feet 105 m above sea level Height 183 feet 56 m Length 7 365 feet 2 245 m Navigation lock Single lift 86 feet 26 m wide 683 feet 208 m long Powerhouse Fourteen 70 000 kilowatt units Total capacity 980 megawatts Overload capacity 1 127 MW Spillway Gates 22 Length 1 310 feet 400 m See also Edit United States portal Water portal Renewable energy portalList of dams in the Columbia River watershed Hat Rock State Park Hydroelectric dams on the Columbia River List of lakes in Oregon McNary Dam HeliportReferences Edit Carbon Monitoring for Action Center For Global Development Carbon Monitoring for Action Center For Global Development The Columbia River System Inside Story PDF BPA gov pp 14 15 Retrieved 17 July 2010 Julius Meier s Governor s Message 1931 Umatilla Rapids dam approved by House group The Hermiston Herald May 1 1941 External links Edit Wikimedia Commons has media related to McNary Dam McNary Lock and Dam Walla Walla District U S Army Corps of Engineers Retrieved from https en wikipedia org w index php title McNary Dam amp oldid 1085003942, wikipedia, wiki, book, books, library,
