Visual Materials
By the mid-fifties, helicopters were being used by the Edison Company to carry snow surveyors into the back country
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An Edison snow surveyor prepares to force a hollow tube into the snow
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An Edison snow surveyor prepares to force a hollow tube into the snow. Measurements made from the resulting core sample will reveal the water content of the snow. When coupled with the depth of the snow pack, hydrographers can estimate the amount of runoff water that will be available in the upcoming spring and summer. from this data, Edison planners can estimate how much hydroelectric generation will be available for the system in the coming months.
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Prior to the development of the purpose built "Sno-Cat" for winter use, specially modified Caterpillar tractors were used to carry supplies over snowed-in roads
Visual Materials
Prior to the development of the purpose built "Sno-Cat" for winter use, specially modified Caterpillar tractors were used to carry supplies over snowed-in roads. This tractor is breaking a trail for the opening of Kaiser Pass Road in the early Spring of 1927.
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The most difficult of surveying assignments at Big Creek was to run levels and alignments for tunnels across the rugged terrain of the back country
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The most difficult of surveying assignments at Big Creek was to run levels and alignments for tunnels across the rugged terrain of the back country. Here, T.R. Bond and his party pose at an unidentified location, about 1912. [THIS IS NOT AN EDISON PHOTO! DO NOT USE THIS NEGATIVE FOR ANY PURPOSE WITHOUT WRITTEN PERMISSION FROM WILLIAM A. MYERS.]
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Early computer equipment being used by Edison workers
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Early computer equipment being used by Edison workers - [with 13 variants]
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Edison President Miller's daughter, Carrita, on one of the family's periodic camping trips to the Sierra high country
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Edison President Miller's daughter, Carrita, on one of the family's periodic camping trips to the Sierra high country.
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