Visual Materials
This picture of Dam #1 taken in February 1913
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Work crews pouring an eastern "wing wall" extension to Dam #1
Visual Materials
By May of 1913, each of the three dams at the Basin was virtually complete. Here, work crews are pouring an eastern "wing wall" extension to Dam #1. By this time, with much of the original "Basin Railroad" flooded by the rising waters of the reservoir, a two-foot narrow-gauge tramway was being used to deliver mixed concrete to each work face.
photCL SCE 12 - 00040

Photo shows the complex system of railroads and chuting employed to pour concrete the dams at Huntington Lake
Visual Materials
Photo shows the complex system of railroads and chuting employed to pour concrete the dams at Huntington Lake. Steam locomotives ran trains of three-yard dump cars from the mixing plant to each dam site. At the dam site the standard gauge trains dumped their concrete into one-yard dump cars that were pulled onto the dam on a narrow gauge track with a gasoline powered locomotive.
photCL SCE 12 - 00067

Upstream core drill hole Dam 1
Visual Materials
Upstream core drill hole Dam 1. U-s station 10+62.7. Elevation 6898.9. This hole is in column of concrete near gate house which shows evidence of different mix than surrounding concrete on upstream face.
photCL SCE 02 - 20101

Power Producers - Not SCE - Stewart Mountain Dam
Visual Materials
Power Producers - Not SCE - Stewart Mountain Dam - Spalling concrete at form ties and cracks from expanding concrete on the upstream face of the arch.
photCL SCE 02 - 27954

Upstream face Dam 1, showing condition of concrete in vicinity of core-drill hole U-2 prior to drilling
Visual Materials
Upstream face Dam 1, showing condition of concrete in vicinity of core-drill hole U-2 prior to drilling.
photCL SCE 02 - 20103

Stone & Webster #11 is working the gravel pit in the Basin in February 1913
Visual Materials
Stone & Webster #11, which began life in 1866 as Central Pacific #24 "Montana," is working the gravel pit in the Basin in February 1913. Trainloads of gravel were carried several miles to a crushing and mixing plant, where the rock was made into concrete for the three dams then under construction on the perimeter of the Basin.
photCL SCE 12 - 00038