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Six views of the Mile Rock Sewage Tunnel construstion. M.M. O'Shaughnessy, engineer. View 1 (2003-0291). Shows tunnel entrance with scaffolding and equipment -- view 2 (2001-0161). Shows two men on the scaffold next to pipes, gages, bags (cement?) -- view 3 (2003-0292). Shows support beams and bracing -- view 4 (2003-0293) Shows tunnel formed in the rock with shovel and drills on the ground -- view 5 (2003-0294). Shows inside of completed tunnel, rail car, and pipes -- view 6 (2003-0295). Shows MacDonald & Kahn Ltd. no. 2 rail car.
Photographs. Nonprojected graphic
6 photographic prints ; 10 x 8 in. or smaller.
Construction--California--San Francisco Tunnels--California--San Francisco San Francisco (Calif.)--Photographs Photographic prints