Central Artery/Tunnel Project : Design contract 17A -- Utility contract 14C : Massachusetts Department of Public Works Central Artery (I-93)/Tunnel (I-90) Project : 1-93 -- Central Artery / Bechtel/Parsons Brinckerhoff, management consultants ; Central Artery Group, civil.
Blue line print. Relief shown by contours. "DRAFT Final map compilation by The BSC/CULLINAN Associates ... Dated December, 1988. Photogrammetry by Martinex Corporation ... Dated June 2, 1986. Photography by James W. Sewall Co." "Horizontal datum: Massachusetts Plane Coordinate System, Mainland zone (NAD 1983). Vertical datum: 1-93/1-90 Project datum, 100' below NGVD 1929."
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