[Landscape view of San Francisco in the background from Yerba Buena Island, showing west approach cut to the tunnel ready for the deck of San Francisco-Oakland Bay Bridge]

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Local identifier: AAD-2076
Title: [Landscape view of San Francisco in the background from Yerba Buena Island, showing west approach cut to the tunnel ready for the deck of San Francisco-Oakland Bay Bridge]
Date: 1934 Sept. 6
Issuance: monographic
Collection: San Francisco Historical Photograph Collection
Type of Resource: still image
Physical Description: 1 photographic print: b&w.
Form: graphic
Use and Reproduction: Permission to use this image must be obtained from the San Francisco History Center, San Francisco Public Library.
Note: Folder: S.F. Bridges-Bay-Construction-Yerba Buena Island.
Printed on back of duplicate: "WEST BAY CROSSING SUBSTRUCTURE NEARS COMPLETION--These stepping stones to carry the San Francisco-Oakland Bay Bridge between San Francisco and Yerba Buena Island constitute the most difficult underwater construction work ever undertaken. This deep water and deep rock pier construction is now beyond the danger stage, according to Chief Engineer C.H. Purcell. beginning with the tower on the skyline, the photo shows Tower W-2, Pier W-3, Pier W-4, Pier W-5, and completed Pier W-6 in the immediate foreground. Pier W-6 was sunk through the deepest water encountered in the bay, 107 feet, and rests on rock at an average depth of 180 feet. Pier W-5, shallowest, rests on rock at an average depth of 110 feet in 68 feet of water. Pier W-4, the huge concrete center anchorage, rests on rock at an average depth of 210 feet in 70 feet of water. Pier W-3 is built on rock at 237 feet below water, which is 70 feet deep...".
LCSH Subjects: San Francisco (Calif.)--Photographs
San Francisco-Oakland Bay Bridge (Oakland and San Francisco, Calif.)
Yerba Buena Island (Calif.)
Keywords: Bridge construction
Bibliographic Number: .b10268984
Handle: http://hdl.handle.net/20.500.12352/islandora:141894