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Needle Valve On Base (Installation of turbines and generators) Item Info

An 84-inch needle valve being placed on erection base in bay R-5 of the right powerhouse at Grand Coulee Dam. Eight of these needle valves, transferred from Boulder Dam, are being temporarily installed in the turbine pits by use of steel reducers (elbows) joining the valve with the 18-foot in diameter penstock tubes. A portion of the stream flow of the Columbia River is to be passed through those needle valves during the low water season. The flow through the needle valves, in addition to that portion of the river flow passing through the turbines in the left powerhouse will make unnecessary the use of the spillway. This program of diversion will provide a minimum of turbulence in the water at the foot of the spillway section, facilitating future repair work to the concrete bucket or trough at the base of the spillway. At some future date, the needle valves will be replaced by 150,000 horsepower hydro-turbines, designed to propel 108,000 kilowatt hydroelectric generators.
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Title:
Needle Valve On Base (Installation of turbines and generators)
Creator:
Fuller, H.W.
Date Created:
1944-11-24
Description:
An 84-inch needle valve being placed on erection base in bay R-5 of the right powerhouse at Grand Coulee Dam. Eight of these needle valves, transferred from Boulder Dam, are being temporarily installed in the turbine pits by use of steel reducers (elbows) joining the valve with the 18-foot in diameter penstock tubes. A portion of the stream flow of the Columbia River is to be passed through those needle valves during the low water season. The flow through the needle valves, in addition to that portion of the river flow passing through the turbines in the left powerhouse will make unnecessary the use of the spillway. This program of diversion will provide a minimum of turbulence in the water at the foot of the spillway section, facilitating future repair work to the concrete bucket or trough at the base of the spillway. At some future date, the needle valves will be replaced by 150,000 horsepower hydro-turbines, designed to propel 108,000 kilowatt hydroelectric generators.
Subjects:
power plants in Washington state (Grand Coulee Dam) installation of turbines and generators
Location:
Washington (State) Grant County Grand Coulee Dam
Latitude:
47.955333
Longitude:
-118.988233
Publisher:
University of Idaho Library Digital Initiatives, http://www.lib.uidaho.edu/digital/
Source:
Army Corps of Engineers Dam Construction photographs, 1933-1965, PG 94, University of Idaho Library Special Collections and Archives
Finding Aid:
https://archiveswest.orbiscascade.org/ark:80444/xv165618
Source Identifier:
94-3-12517
Type:
Image;StillImage
Format:
image/jpeg

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Source
Preferred Citation:
"Needle Valve On Base (Installation of turbines and generators)", Columbia River Basin Project: Dam Construction in the Pacific Northwest, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/crbp/items/crbp1077.html
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Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at [libspec@uidaho.edu](mailto:libspec@uidaho.edu). The University of Idaho Library is not liable for any violations of the law by users.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/
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