Grainthorpe Mill Grainthorpe · Lincolnshire · England

Grainthorpe Mill, also recorded as Borman's Mill, was a tower corn mill at Grainthorpe. It probably dates from the early nineteenth century. In its earlier form it had roller-reefing sails and was hand wound, a traditional arrangement before later alteration.

A major change followed damage in 1895, when the mill lost its cap and sails in a tailwind. The mill was rebuilt, gaining another storey, a fantail, and four patent sails. The rebuilding work was carried out by Saunderson of Louth. This gave the mill a more modern late nineteenth-century working arrangement, with automatic winding by fantail and patent sails rather than its earlier hand-wound form.

The mill had three pairs of stones and continued to work until about 1930. It lost its sails around 1934. The sails, cap, and most of the machinery were removed shortly before the Second World War. Later records show the tower as a reduced survival, with the added top storey removed and most of the machinery gone. Grainthorpe Mill now survives as a shortened tower, preserving the footprint and mass of a village tower mill whose working life extended from the early nineteenth century into the early twentieth century.