NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Illinois drainage (Michigan drainage)
From: Frank Reed CT
Date: 2005 Nov 22, 21:32 EST
From: Frank Reed CT
Date: 2005 Nov 22, 21:32 EST
Bob Batten wrote: "The St Clair River empties into Lake St Clair which is a shallow basin averaging 15 feet or so deep and about 25 statute miles in diameter. This is the major recreational boating area for the greater Detroit region. The Eastern side of the lake is much shallower, with marshes that provide good fishing. A shipping channel of about 30 feet deep was dredged across the lake. The flow out of Lake St Clair is to the South, forming the Detroit River." For anyone interested in the bathymetry of the great lakes, there are wonderful data files and derived imagery available on the USGS Great Lakes site: http://www.ngdc.noaa.gov/mgg/greatlakes/greatlakes.html You can follow the details that Bob wrote about above in very nice detail. It's easy to see why erosion would not deepen the channel through Lake St. Clair, though it might at the choke points at either end. An interesting feature in Lake Michigan is an ancient meandering river channel deep underwater up near the connection with Lake Huron. -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars
