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KP-2045-R2 - Klamath Project. Mossing Operation. Two T-D6 cats pull a heavy chain in lateral to cut away weeds and moss. The cats work a see-saw operation with the 100 foot heavy chain, that is, one cat moves ahead while the second one holds fast then the second one moves ahead while the first one holds fast; August 16, 1950; Photo by Andrew M. Bergloff

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