An Act of Parliament was obtained which included running powers for the last half mile into Bath over the Midland's line, and the use of their Bath station at Queen Square. The terrain was quite different from the previous ground covered, and engineers had to build many tunnels and viaducts. The line was steep, with a ruling gradient of 1 in 50. The summit, in the Mendip Hills, was 811 feet above sea level. (247 m).. From Radstock to Midford the railway followed the route of the Radstock branch of the Somerset Coal Canal which was little used and had been replaced by a tramway on the canal's towpath in 1815. The S&DR purchased the waterway, filled in the canal, removed the tramway and built its railway along the route. This greatly reduced the cost and time of construction and provided a mostly level course, but forced the railway to follow the sharply-curved course of the original canal.