Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, progress panorama, Shaft 9, looking northeast, compressor house on right, Barre, Mass., Jul. 10, 1931

Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, progress panorama, Shaft 9, looking northeast, compressor house on right, Barre, Mass., Jul. 10, 1931

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