DCHP-1 Online
ice-jam 
n. a pile-up of ice-cakes in a river or other narrow watercourse.
See also: ice-cake jam ((n.)) (def. 1)
- 1846 I have mentioned that, in the spring of 1845, an ice-jam, as it is called here, occurred, which suddenly raised the level of the Niagara thirty and forty feet above its ordinary floods. . . .
- 1898 Captain Mariner says the boat was landed high and dry by the pressure of the ice jam, but that he relaunched her without any damage whatever.
- 1962 Near Matty Island, the ice jam reached from shore to shore. . . .
- 1846 I have mentioned that, in the spring of 1845, an ice-jam, as it is called here, occurred, which suddenly raised the level of the Niagara thirty and forty feet above its ordinary floods. . . .