Disregarding factor of wind and locks, how long would it take a rubber ball in the Detroit River to reach Anticosti Island at the mouth of the St. Lawrence River?
I did a rough calculation of using Detroit to Havre-Saint-Pierre, Quebec across the mouth of the St. Lawrence, some 1300 road miles to come up with around four weeks based on water flow averaging 2 mph.
Curious if anyone has seen a hydrology stuff in this regard. [[This topic came up a couple of times when I lived in Detroit.)