Daily: 10 A.M.–5 P.M.
Closed on Tuesdays
1151 Oxford Road
San Marino, CA 91108
Visual Materials
Portal Powerhouse - Photo taken shortly after break-through of diversion ditch seepage into tailrace to south of Powerhouse.
photCL SCE 02 - 43932
Visual Materials
Portal Powerhouse - Cut bank in rear of powerhouse structure showing extent of minor washing due to overflow of seepage water into excavation.
photCL SCE 02 - 43734
Visual Materials
Portal Powerhouse - Excavation for spill pipe of Surge Tank.
photCL SCE 02 - 44605
Visual Materials
Portal Powerhouse - Forebay - Foundation excavation in vicinity of sluice pipe. Picture covers from axis to upstream toe. Dragline excavating for impervious cut-off upstream from toe to lessen seepage.
photCL SCE 02 - 43310
Visual Materials
Portal Powerhouse - Close-up of 1500 cfs discharge from end of by-pass pipe - unrestricted end area.
photCL SCE 02 - 43913
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
