Visual Materials
Portal Powerhouse
- Description
- Portal Powerhouse - Installing backing I-beams (15") prior to forming for concrete. Strengthening to reduce vibration during high flows.
- Date
- 11/3/1955
- Call number
- photCL SCE 02 - 43902
Visual Materials
Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
Visual Materials
Portal Powerhouse - Temporary backing to reduce vibration in 3/8" plate bulkhead in turbine Wye branch inadequate; it was replaced with concrete disc back by I-beams.
photCL SCE 02 - 43898
Visual Materials
Portal Powerhouse - 12' diameter pipe installed to reduce pressure at portal during high flows. At time, the lower baffle was still there at outlet restricting end area.
photCL SCE 02 - 43917
Visual Materials
Portal Powerhouse - Forebay - Installing 6" dia. drain in foundation, sluice pipe area, prior to any fill. Note form for concrete cutoff around pipe. One of three installed.
photCL SCE 02 - 43323
Visual Materials
Portal Powerhouse - Placing concrete in supporting wall under end of 12' diameter pipe. Excavating old concrete anchor. [Forming new] foundation & Wye branch anchor.
photCL SCE 02 - 43529
Visual Materials
Portal Powerhouse - View of forming for substructure concrete, showing neat excavation in tight decomposed granite for the draft tube encasement.
photCL SCE 02 - 43623
Visual Materials
Portal Powerhouse - Final leveling of Scroll Case prior to concrete encasement.
photCL SCE 02 - 44618