Erecting Traveller, Kettle Creek Trestle, M.C.R.R." derrick

An illustration of the "Erecting Traveller, Kettle Creek Trestle, M.C.R.R." derrick, from the publication "The Engineering and Building Record", June 2, ca. 1888. It was designed and built by the Detroit Bridge Company. Regarding this illustration, the publication states: "This derrick was designed and built by the Detroit Bridge Company for their own use on the Kettle Creek trestle of the M.C.R.R.. Its duty was to remove the old and set up the new structure without interfering with the regular traffic, which was all transferred to one track while work progressed on the other".