Yes, it has, at least as far downstream as Washington DC. I don't have the the timeframe it occurred but I have seen photographs of it. Farther upstream it is not unusual for it to freeze over as far downstream as The Great Falls.
1938
1978
Never. The Amazon river is placed on a tropical rain forest which is warm all the time.
Yes, the St. Lawrence river freezes over each winter.
In 2010; and the last time before that was 1987.
Yes and no. The waterfall itself does not freeze over. But with a prolonged freeze, an "ice bridge" may form in the river (below, I think).
No, the river Ganges does not typically freeze over due to its warm climate and continuous flow of water. However, in some very rare cases during severe cold spells, parts of the river can experience temporary freezing.
General George B. McClellan was the first commander of the Federal Army of the Potomac.
This charter authorized settlers coming over to the "new world" the right to settle between present day North Carolina and the Potomac river. It also said the settlers would have the same rights as the people back in England.
The Union Army had to cross the James River on its way from Cold Harbor to Petersburg. Richmond is on the James River which flows on southeastwardly from Richmond, to the Chesapeake Bay. The James becomes much wider after passing Richmond, and to cross it the Union army had to build temporary pontoon bridges over 2100 feet long, among the longest ever built.
The longest stream ever recorded is the Nile River in Africa, stretching over 4,100 miles (6,650 kilometers) in length. It is considered the longest river in the world.
Ice would begin to form on the surface- small chunks of ice, floating on the river as ice floes. It happens all the time in rivers in really frigid areas.