Image / At the bottom end of the pipelines lies this complex casting. the …

At the bottom end of the pipelines lies this complex casting. the "needle valve housing."

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Title: At the bottom end of the pipelines lies this complex casting. the "needle valve housing."
Creator: Stone & Webster, photographer
Date Created and/or Issued: 1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
Contributing Institution: Huntington Library
Collection: Southern California Edison Photographs and Negatives
Rights Information: For information on using Huntington Library materials, please see Reproductions of Huntington Library Holdings: https://www.huntington.org/library-rights-permissions
Description: At the bottom end of the pipelines lies this complex casting, the "needle valve housing." Inside this pipe, a long, slender "needle valve" travels back and forth to regulate the flow of water onto the waterwheel, thus regulating the electrical output of the generators. This picture of one of the four needle valve housings in Powerhouse #1 gives an idea of the comparatively small size of the hole through which the water must come.
Type: image
Format: 334533 Bytes
Extent: Copy negative ; A--8x10
Identifier: 12 - 00046
232861
http://hdl.huntington.org/cdm/ref/collection/p16003coll2/id/5490
Subject: Hydroelectric power-plants
Construction
Construction crew
Penstocks
Pipes (Conduits)
Place: Big Creek (Calif.)
Fresno County (Calif.)
Source: Southern California Edison Photographs and Negatives
Story of Big Creek
Southern California Edison Photographs and Negatives, Huntington Digital Library

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