"The recent snow couldn't stop progress on the largest resurfacing scheme carried out by East Sussex County Council since 1994, " she said.
An NFU spokesman said the recent snow had the worst effect in north Wales, Shropshire, west Cumbria, and the Pennines, and left a "devastating picture".
The opening was delayed after more than 200 trees were brought down along the valley road in the recent heavy snow and rain, and the route became dangerous.
He said the clay soil had absorbed recent rain and snow, making it more unstable.
Town clerk Kate Thacker said the ground had become saturated because of recent floods followed by melted snow.
The levels of snow across the Alps have not gone down much in recent years - but the time at which the snow falls has changed.
It says icy surfaces will continue to be a threat across much of the UK, especially where snow has fallen over recent days.
On a recent trip to the West coast (where rain and snow were not a material hazard), I managed to wear the same set of wedge heels to five meetings.
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In the recent case, what would have been a record-or near-record snow was forecast by virtually everyone and for very good reasons.
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Standing in front of a fleet of gleaming mini-buses, with the snow-capped Pamir mountains in the background, Mr Zanjani talks about the recent chain of events that have catapulted him into the headlines both at home in Iran and abroad.
Weather forecasters have said that recent rising temperatures and strong winds in the area have made it more dangerous as upper layers of snow are more likely to become detached, Italian media report.
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