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

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