CLOSED TODAY

Visual Materials

Portal Powerhouse - Forebay - Left: placing impervious blanket material

Description: Portal Powerhouse - Forebay - Left: placing impervious blanket material - Foreground: material scraped from damsite.
Type: Visual Materials(Opens in new tab)
Date: 7/20/1955
Call number: photCL SCE 02 - 43581
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

You might also be interested in

Portal Powerhouse - Forebay
Visual Materials
Portal Powerhouse - Forebay - Placing impervious blanket on morane slope upstream from right abutment.
photCL SCE 02 - 43534
Portal Powerhouse - Forebay
Visual Materials
Portal Powerhouse - Forebay - Placing first fill in impervious section under location of sluice pipe. Note dozer pushing layer of saturated & disturbed surface material, exposing firm foundation, before fill placement.
photCL SCE 02 - 43315
Portal Powerhouse - Forebay
Visual Materials
Portal Powerhouse - Forebay - Damsite view, borrow area 2 in foreground.
photCL SCE 02 - 43604
Portal Powerhouse - Forebay
Visual Materials
Portal Powerhouse - Forebay - View from station 5+00, looking toward left abutment, showing outcroppings of ledge rock while excavating for upstream cutoff under impervious section.
photCL SCE 02 - 43311
Portal Powerhouse - Forebay
Visual Materials
Portal Powerhouse - Forebay - View of portion of reservoir stripped for borrow and left section of damsite, from new Forest Service road.
photCL SCE 02 - 43314
Portal Powerhouse - Forebay
Visual Materials
Portal Powerhouse - Forebay - Impervious fill upstream and start of rock fill in sluicepipe area of forebay dam.
photCL SCE 02 - 43322