Visual Materials
Portal Powerhouse
- Description
- Portal Powerhouse - Excavation in progress at powerhouse site.
- Date
- 7/30/1955
- Call number
- photCL SCE 02 - 43331
Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108

Visual Materials
Portal Powerhouse - Portal Forebay - Excavation in progress in intake channel.
photCL SCE 02 - 43725

Visual Materials
Portal Powerhouse - Progress picture showing excavation in progress in powerhouse and weir area.
photCL SCE 02 - 43330

Visual Materials
Portal Powerhouse - Flattening south excavation slope between powerhouse site and tunnel diversion channel.
photCL SCE 02 - 43541

Visual Materials
Portal Powerhouse - Excavation below pipe. Progress about 7ft. from final elevation.
photCL SCE 02 - 43658

Visual Materials
Portal Powerhouse - Tailrace channel excavation progress in section isolated by diverting tunnel discharge in Potter Creek Channel.
photCL SCE 02 - 43545

Visual Materials
Portal Powerhouse - Forebay - Progress of excavation in intake channel to vertical shaft.
photCL SCE 02 - 43703