In 1635, Owersby-based local landowner, Sir John Monson drained the Ancholme valley by cutting a straight new channel making two rivers at Brigg, which made the town less vulnerable to flooding.
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It ran from the River Ancholme, near South Kelsey toward Caistor through six locks, terminating at Moortown, 3.5 miles (5.6 km) away from its intended terminus at Caistor.
He was responsible for the New River Ancholme Drainage Scheme in Lincolnshire, and Horkstow Bridge, which he designed to cross the river at Horkstow in 1835–6, is one of the earliest suspension bridges to survive and remains substantially as designed.