1955  Frazzle ice has been pouring down the river steadily. . . .
1959  This year . . . there is no ice jam on the river. In the past, frazil ice has piled up as high as 18 feet and as far up river as 2,000 feet from the city's waterfront.
1963  [Caption] A crack near the summit of the ice hump, looking west towards Greece's Point. The dark band is clear river ice. Below is the frazil ice extending some 35 feet to the surface of the river.