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Construction workers
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Drainage
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Klamath Project (U.S.) -- History
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Tractors
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Trenches
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Tule Lake Region (California)
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P12-200-2929NA Klamath Project - Oregon-California. View of small crawler tractor being used to backfill the open trench. Excavated earth, windrowed along the open trench, provides the material needed ...
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