The Tweed viaduct crossing the River Tweed is an area of special conservation under EU regulations, due to the presence of protected species.
Brook Lampreys and Atlantic salmon can be seen in this stretch of the river, and protected flowers and plants grow on the banks.
Network Rail are working with Environmental Groups, such as SEPA, to make sure they disturb wildlife as little as possible while building the Waverley line.
More top news
Kerrie Gosney brings you Sunday night's forecast
The party leader said her MPs may be in a position to act as deal makers - and they would refuse to allow an exit from the EU.
Rain spreading east Sunday. Decent day on Monday, more changeable thereafter