 Thomas Telford's Caledonian Canal used lock gates and machinery with castings produced at Butterley, and two steam dredgers designed by Jessop.The company also produced steam locomotives, mostly for its own use, but it provided two for the Midland Counties Railway.It produced all the necessary castings for the new railways and two complete lines, the Croydon, Merstham and Godstone Iron Railway and the Cromford and High Peak Railway.