Others are connected by winter ice roads, but their access evaporates every spring.

In deep cellars stocked with winter ice the temperature was kept below eight degrees.

By the time the winter ice melted, the island was above sea level, and both pipelines were in place and tested.

In 1899, the river was the scene of some excitement when in the late winter ice could be seen floating down river.

In 1976 and 1977, reports pointed out several problems related to the gates' function due to erosion, winter ice jams, and unsatisfactory fishway operation.