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

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  Big Creek snow survey. four men break snowshoe trail for Sno

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  Big Creek snow survey. four men break snowshoe trail for Sno-cat. Kaiser Meadow

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  By the mid-fifties, helicopters were being used by the Edison Company to carry snow surveyors into the back country

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  By the mid-fifties, helicopters were being used by the Edison Company to carry snow surveyors into the back country.

  photCL SCE 12 - 00191

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  One of six very early model Caterpillar tractors used to haul materials to the Rush Creek plant site from the Benton Railroad Station 56 miles away

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  One of six very early model Caterpillar tractors used to haul materials to the Rush Creek plant site from the Benton Railroad Station 56 miles away.

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  The winter snows of the Sierras were the entire reason for the Big Creek Project

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  The winter snows of the Sierras were the entire reason for the Big Creek Project. As the heavy snowpack melted, the runoff water was stored in reservoirs, then used to generate electricity before going down to irrigate crops in the San Joaquin Valley below. Unfortunately, the heavy snowfalls at higher altitudes made construction of portions of the project very difficult, shortening the working season and making transportation difficult.

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