TL5172 : Stretham Old Engine There are three preserved beam pumping engines in the Fens. In addition to Stretham there is one at Pinchbeck (q.v.) and one at Dogdyke near Tattershall Castle. There is a preserved horizontal engine at Owston Ferry (q.v.) in north Lincolnshire. The Somerset levels also has three preserved sites with steam engines at Westonzoyland (q.v.), curry Moor (q.v.) and Aller Moor.