Contract No. 66, Regulating Dams, Middle Branch (New Salem), and East Branch of the Swift River, Hardwick and Petersham (formerly Dana), looking northerly at dam 4, middle branch regulating dam, Hardwick, Mass., Aug. 8, 1939

Contract No. 66, Regulating Dams, Middle Branch (New Salem), and East Branch of the Swift River, Hardwick and Petersham (formerly Dana), looking northerly at dam 4, middle branch regulating dam, Hardwick, Mass., Aug. 8, 1939

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