Probably one of the more challenging environments that could be added would be the Port of Cleveland, and Cuyahoga River. At the lakefront port general cargo is handled. Up the river bulk commodities are handled all the way up to the head of navigation at the steel mill. One of the most challenging aspects of this is that there is one turning basin upriver, but otherwise, transiting the river means backing down to the lakefront, as ships do over 400 times per year.
