Sudbury Department, Sudbury Dam Hydroelectric Power Plant, form for concrete outlet conduit, Framingham Reservoir No. 3 service, Southborough, Mass., Sep. 22, 1915

Sudbury Department, Sudbury Dam Hydroelectric Power Plant, form for concrete outlet conduit, Framingham Reservoir No. 3 service, Southborough, Mass., Sep. 22, 1915

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