Visual Materials
Portal Powerhouse
- Description
- Portal Powerhouse - Tailrace channel excavation progress in section isolated by diverting tunnel discharge in Potter Creek Channel.
- Date
- 8/15/1955
- Call number
- photCL SCE 02 - 43545
Visual Materials
Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
Visual Materials
Portal Powerhouse - View from highway bridge showing excavation progress in tailrace channel section isolated by diverting flow into Potter Creek Tunnel.
photCL SCE 02 - 43562
Visual Materials
Portal Powerhouse - Diverting tunnel flow from Rancheria Creek channel across main channel and into Potter Creek channel.
photCL SCE 02 - 43308
Visual Materials
Portal Powerhouse - Starting to fill Potter Creek temporary diversion channel after returning tunnel flow to permanent tailrace.
photCL SCE 02 - 43686
Visual Materials
Portal Powerhouse - Enlarging Potter Creek channel to handle tunnel flow during excavation of tail race channel.
photCL SCE 02 - 43302
Visual Materials
Portal Powerhouse - Leveling of spoil area over old Potter Creek channel. Note forest litter spread along north bank of tailrace channel.
photCL SCE 02 - 43896
Visual Materials
Portal Powerhouse - Record photo of appearance of tailrace channel immediately downstream from powerhouse prior to excavation for tailrace weir.
photCL SCE 02 - 44821