Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, lower intake channel, Shaft 12, looking west, Quabbin Lake in background, Hardwick, Mass., Nov. 25, 1931

Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, lower intake channel, Shaft 12, looking west, Quabbin Lake in background, Hardwick, Mass., Nov. 25, 1931

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