Alvingham watermill is close to the Louth Navigation about 3 miles north east of Louth (TF 367914).
It was built in the 17th century, with alterations being made in the 18th and 19th centuries.
The breast shot waterwheel, 11 feet in diameter, is driven by water taken from the nearby river Lud.
In the 1970s, the mill was restored to full working order.
There has been a mill on this site since the 12th century.
Frank Robinson, 2011