Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, finished joint on 6 in. casing for vent hole between Shafts 11 and 12, Hardwick, Mass., Nov. 9, 1933

Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, finished joint on 6 in. casing for vent hole between Shafts 11 and 12, Hardwick, Mass., Nov. 9, 1933

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