Unfrozen

Collectively, the African Great Lakes contain approximately 7400 cubic miles (or 31,000 cubic kilometres) of water, which is about one quarter of Earth's unfrozen surface fresh water.

In getting out of this I found it easier to wade down a shallow unfrozen stream than to wallow through deep snow.

Diggle Station lies high up in the Pennine Chain, subject to extreme low temperatures. With this and heavy snowfall in the winter months, Diggle bids fair to compete with the Scottish lines under similar weather conditions, and the provision of unfrozen water in the higher ambient temperature of the tunnel must be a boon to harassed engine drivers whose thirsty steeds run short of water up the gruelling 1 in 125 seven-mile climb from Stalybridge.

One would assume that here the chief problem would be to keep the conductor rails and point mechanisms unfrozen.