 Starting from Caledonian Railway metals at Rachan Junction, near Broughton station (originally part of the Symington, Biggar and Broughton Railway's network), the railway followed the route of the River Tweed and what is now the A701 closely for 8 miles (13 km) in a southerly direction.It extended to Victoria Lodge, the headquarters for the dam's construction.An intermediate stop with wooden platforms was later established at Crook Halt, to serve the Crook Inn.