Visual Materials
Portal Powerhouse
- Description
- Portal Powerhouse - Charging Skip-loader with concrete thru hole in top of 12' pipe, outside tunnel portal.
- Date
- 9/3/1955
- Call number
- photCL SCE 02 - 43693
Visual Materials
Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
Visual Materials
Portal Powerhouse - Concreting pipe supports in Ward Tunnel. Skip-loader delivering concrete to buggies on runway.
photCL SCE 02 - 43692
Visual Materials
Portal Powerhouse - Forebay - Mucking skip-loader, inlet channel.
photCL SCE 02 - 43766
Visual Materials
Portal Powerhouse - Forebay - Excavating trench thru damp area in original ground downstream from relief hole R-24, for installation of perforated pipe drain.
photCL SCE 02 - 43701
Visual Materials
Portal Powerhouse - Excavating rock shot out of 15' plug. Left remaining at bottom of surge chamber shaft until after tunnel outage. D-4 [?] in tunnel loading into skip operated by Bay Cities Crane at top of shaft.
photCL SCE 02 - 44804
Visual Materials
Portal Powerhouse - Forebay - Progress picture showing placement of upstream impervious fill in sluice pipe area, to top of 24" sluice pipe concrete encasement.
photCL SCE 02 - 43327
Visual Materials
Portal Powerhouse - Water trapped during night around powerhouse structure - due to failure of diversion pipe to carry increased seepage thru rack fill between tunnel diversion channel and bench at elevation.
photCL SCE 02 - 43733