The Clinton River in Michigan, 60 miles long, has a channel eight feet deep and 60 feet wide at its mouth, which narrows down to 50 feet up the stream. The improvement extends for about eight miles up the river and vessels of light draft ascend two miles farther. The lower portion of the Rouge River in Michigan has been widened and deepened for three miles or more from its outlet into the Detroit River up to Wabash Bridge or farther. Its tonnage in was 1,954,470 tons.
The Great Lakes and Connecting Water Saint Mary's River is the outlet of Lake Superior and flows from Point Iroquois, 63 miles southeasterly, to the Detour Passage into the northern end of Lake Huron. It has a total fall of 18 to 21 feet. Its improved one way channels are 300 feet wide and 21 feet deep and its bothway or upbound and downbound single channel is 600 feet wide and 21 feet deep. There are four large locks in the Saint Mary's River located at Sault Sainte Marie, Michigan. The Weitzel Lock is 515 feet long and 80 feet wide with a lift of 201/2 feet. The Poe Lock is 800 feet long and 100 feet wide with a lift of 201/2 feet. The third lock is 1,350 feet.long and 80 feet wide with a lift of feet. A fourth lock is 1,350 feet long and 80 feet wide with a lift of 201/2 feet, nearing completion. The Weitzel Lock has a depth of
12 6/10 feet of water on the lower breast wall, the Poe Lock has a depth of water of 18 feet on the lower breast wall, and the third and fourth locks have each a depth of water of 241/2 feet on the lower breast walls.
The Saint Clair River connects Lake Huron and Lake Saint Clair. It is 40 miles long. Its channel is from 20 to 22 feet deep and has a width of 400 to 2,400 feet. A channel has been dredged through the Saint Clair Flats, 300 feet wide and 20 feet deep. The distance through Lake Saint, Clair traversed by Great Lake vessels is 18 miles, although the lake is 30 miles wide. The outlet of Lake Saint Clair is the Detroit River which is 28 miles long and flows into Lake Erie. It has several channels. Its Fighting Island Channel, four and one-half miles long, is 800 feet wide and 22 feet deep. Its Amherstburg Channel is 12 miles long, 600 feet wide and from 20 to 22 feet deep. Its Livingstone Channel is nine and one-half miles long and has a width of from 300 to 800 feet, and a of 22 feet. These are connecting waterways between the Great Lakes. Both the