Re: Lake champlain the sixth Great Lake??
I was just quoting from a book (cruising lake champlain and the hudson river)on it being being touted that it should be registered as one of the great lakes. It too is connected to the great lakes, by the St Lawrence Seaway.
When I look up lake st clair it only averages a 10 foot deep which to me is more of a wetlands area than a great lake.
Overview
Located between lakes Huron and Erie, Lake St. Clair is the smallest lake in the Great Lakes system. Heart-shaped and shallow (averaging only 10 feet/3 meters deep), the lake requires periodic dredging to ensure bottom clearance for large ships. The northeastern portion of Lake St. Clair is an extensive delta system, the largest within the Great Lakes. The Michigan portion of the delta has been urbanized, while Ontario has set aside much of the wetlands as the Walpole Indian Reservation. Wetland loss from urban and recreational encroachment continues to be a problem on the U.S. side; and in Ontario, many of the wetland areas have been wiped out by agricultural drainage.
Champlain on the otherhand can reach depths up to 400 feet:
Champlain is a large body of fresh water. Approximately 1130 km? (435 square miles) in area, the lake is roughly 180 km (110 miles) long, and 19 km (12 miles) across at its widest point. The maximum depth is approximately 400 feet. The lake varies seasonally from about 95 to 100 feet above mean sea level.