NO
no they did not
The Great Lakes are connected to the Gulf of Mexico by way of the Illinois River (from the Chicago River) and the Mississippi River. An alternate track is via the Illinois River (from Chicago), to the Mississippi, up the Ohio, and then through the Tennessee-Tombigbee Waterway(combination of a series of rivers and lakes and canals), to Mobile Bay and the Gulf. Commercial tug-and-barge traffic on these waterways is heavy.
No it is not man made, but it has been altered by man for flood control reasons & barge traffic
yes
Mississippi river
No problems. height would be a restriction at due to the bridge at baton rouge.
Prior to the US Civil War, the Mississippi River supported a substantial amount of commercial traffic. In 1860 for example, one thousand commercial vessels operated on the Mississippi River and its major tributaries. At least some 190,000 tons of products were trans ported on the river.
Because it opened the Mississippi river to American traffic.
Grant forced its surrender closing the Mississippi River to southern traffic.
The Mississippi River
I think it is the Mississippi River but not for sure
Irrigation, hydroelectric power, sand dredging, barge traffic, casinos, municipal water supplies, recreation, wildlife habitat, fishing, etc.