The line started at Clay Cross Works, just above the northern portal of the Clay Cross Tunnel. From here, the line swung northwards out of the town, then curved westwards through 180-degree to avoid going through Clay Cross town centre. The problem with this route was the Chesterfield Road, now the A61, and crossing it required a steel girder bridge spanning 45 feet. The height had to be 16 feet above road level, which required a half-mile long approach embankment to be built. The bridge and embankment were the only major pieces of engineering on the entire route between Clay Cross and Ashover. The bridge support on the west side of the road can still be seen today.