McLean Contracting Crane barge being towed by the Intercoastal Marine tug Challenger (not seen) and pushed by the Intercoastal Marine tug Coastal Trader west past Fort Monroe Hampton VA into the Hampton Roads area.
The Baltimore is on a 70 foot wide by 140 foot long barge and has a reconfigurable boom that can be 111 feet to 171 feet long and is capable of lifting 100 tons or more.
http://www.mcleancontracting.com/equipment/baltimore/