Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, general view at Shaft 11, looking southeasterly, Quabbin Aqueduct, Hardwick, Mass., May 13, 1935

Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, general view at Shaft 11, looking southeasterly, Quabbin Aqueduct, Hardwick, Mass., May 13, 1935

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