River Loddon

The River Loddon is a tributary of the River Thames in southern England. It rises at Basingstoke in Hampshire and flows northwards for 28 miles (45 km) to meet the Thames at Wargrave in Berkshire. Together, the Loddon and its tributaries drain an area of 400 square miles (1,036 km²).

The river had many active mills, and has many remnants of flow modifications by the building up of mill pond reaches with weirs and sluices and the adjacent mill races (also called leats). Most of these used wheels to generate their power – two used water turbines. One was a silk mill for a short period, and one a paper mill, with the rest milling corn or producing flour. Several have been converted to become homes or hotels, but Longbridge Mill has been restored and still operates occasionally. The river has been used for recreational and possibly minor commercial navigation and in drier spells it can be safely canoed in some places.

The Loddon is a habitat for diverse wildlife. Former gravel workings have become Loddon Nature Reserve and Dinton Pastures Country Park. A section of it is a designated Site of Special Scientific Interest due to rare populations of bulbs and pondweed. Improvements made to the river under the Water Framework Directive, have included the installation of a fish bypass at Arborfield Mill for migratory species including salmon.