The river used to rejoin the main channel at Stamp End in Lincoln, but was re-routed into the SouthDelph, a drainage ditch constructed by John Rennie in the early 19th century that joins the main channel below Bardney lock. The stream is known to have been used as a drainage channel in the mid-13th century and is thought to be pre-medieval or even Roman. Parts of it were culverted in 1847 to allow the construction of Lincoln Central railway station.