Visual Materials
Portal Powerhouse
- Description
- Portal Powerhouse - Excavation in inlet channel near vertical shaft north-west approx. 18' above bottom grade.
- Date
- 8/15/1955
- Call number
- photCL SCE 02 - 43547
Visual Materials
Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
Visual Materials
Portal Powerhouse - Forebay - Inlet channel from top of vertical shaft.
photCL SCE 02 - 43768
Visual Materials
Portal Powerhouse - Forebay - Inlet channel from vertical shaft shows blanket in place.
photCL SCE 02 - 43767
Visual Materials
Portal Powerhouse - Forebay - Progress of excavation in intake channel to vertical shaft.
photCL SCE 02 - 43703
Visual Materials
Portal Powerhouse - Forebay - View of intake channel taken from vertical shaft. Absence of hard rock in area of excavation is here shown.
photCL SCE 02 - 43631
Visual Materials
Portal Powerhouse - Foundation excavation in firm decomposed granite draft tube side of powerhouse. Excavation approx. 1' above final grade.
photCL SCE 02 - 43546
Visual Materials
Big Creek, Huntington Lake Dams - Portal Forebay - Progress in intake channel. Drilling for rock excavation approx. 5' above grade.
photCL SCE 02 - 43732