Lee Wasnidge from Northern rail explained to ITV Border why they felt it necessary to close the viaduct at Cummersdale in north Cumbria. The move has caused disruption to rail services between the city and west Cumbria.
The Viaduct already had scaffolding on it for routine maintenance and so that it could be painted.
Inspections will be carried out to determine if it is safe to ropen the viaduct this week.
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Young's Seafood itself is now on the market. The potential sale is understood not to have an affect on the possible closure of Pinneys.
Scottish Secretary David Mundell is to meet with key figures as efforts to save the closure-threatened Pinneys seafood factory continue.
Scottish Parliament has been warned that the closure of Pinneys factory would be an 'economic tsunami' for Annan.