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Huge Steel Pipes Prevent Wall Collapse (108 views)
Big Dig For The Transbay Center external link
Fremont Street between Howard and Mission
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San Francisco, California

(Photo posted Sunday 24 February 2013)

(Photo taken 16:54:03 Saturday 23 February 2013)

© 2013 Bryan Costales
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Huge steel pipes were welded to the vertical side supports that prevented wall collapse. Note the work lights near the highway cones on the left.

by Bryan Costales
(2 of 9) An elevated platform was supported by steel stilts in the center. On this platform were two cranes used to haul up dirt from the hole. Notice busy First Street passing over the hole midway.
by Bryan Costales
(3 of 9) A backhoe stood next to a crane on the platform on stilts that ran down the center of the dig.
by Bryan Costales
(4 of 9) The dig as visible mid-block between Fremont and First Streets. Notice how much deeper it was in the lower left of this image.
by Bryan Costales
(5 of 9) There were two crane outliers to the main central island on stilts in the center of the dig. Also note the red porta-potty in the center of this shot.
by Bryan Costales
(6 of 9) A generator could be seen far below at the bottom of the dig as it appeared this day.
by Bryan Costales
(7 of 9) A backhoe parked on the central platform near to First Street. Note the seat in the backhoe cab to give you a sense of the scale based on the understood size of a seated man.
by Bryan Costales
(8 of 9) A yellow depth gauge was mounted on the wall across from Minna Street. It was a little too far away to read clearly.
by Bryan Costales
(9 of 9) A hole in the fence allowed this dramatic overview of the project as seen from Minna Street near to Second Street.