Wintry weather conditions are causing worries for staff at a popular tourist attraction which is still struggling to recover from the summer floods.
Torrential rain in the summer caused the damage to the line
The Severn Valley Railway (SVR), which runs from Bridgnorth, Shropshire, and Kidderminster, Worcs, is still only partially open.
John Hill of the SVR said if the weather was extremely bad then it could set repair work back.
It is hoped the 16-mile (26km) line will be fully open by Easter 2008.
The line, most of which was damaged during the summer floods, is currently open between Kidderminster and Bewdley.
However, the state of the line is not putting visitors off with 10,000 people booking tickets on the railway's Santa Express service.
And Mr Hill said they had people regularly coming in and giving them cheques, some of them for more than £1,000.
"Then we get a lot of cheques from senior citizens apologising for giving us £5 or £10," he added.
"But at the end of the day when we reach the sum we require most of it will be made up from small sums like that," he said.