Contract No. 30, Stream Control Works at Main Dam, Swift River Reservoir, Belchertown, Enfield, Ware, progress panorama of downstream cofferdam, looking west, diversion tunnel, Belchertown, Mass., Sep. 11, 1931

Contract No. 30, Stream Control Works at Main Dam, Swift River Reservoir, Belchertown, Enfield, Ware, progress panorama of downstream cofferdam, looking west, diversion tunnel, Belchertown, Mass., Sep. 11, 1931

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