Trelaske Water Mill

Trelaske Water Mill


This 18th century stone water mill was used for milling corn and is Grade II listed. Now in private ownership, it is no longer a working mill but retains the original machinery.
The owners can be contacted by groups interested in visiting.


Postcode: PL15 7QQ
Geocode: @50.597267, -4.40695 Open in Map

Trelaske Water Mill lies next to The River Inny, approximately 1/2 mile upstream from Trekelland Bridge.
Traveling south from South Petherwin on the B3254 you will reach Trekelland Bridge at the bottom of the valley where the road narrows.
Pass over the bridge and then turn immediately right up a single track road marked 'Unsuitable for wide vehicles'.
Pass through a shallow ford and then continue till you come to a farm on the right.
The mill is the last building on the right hand side.


Do you own or look after this mill? Contact us

Opening Times:

By appointment only.
Please contact owner by email to arrange your visit.

National Mills Weekend opening times:

Closed for 2020 National Mills Weekend due to Coronavirus (COVID-19).
Look forward to welcoming visitors in 2021.

Additional Information:

Trelaske Water Mill is believed to have been the customary mill of the medieval manor of Trelaske, where tenants would have brought their grain to be ground.
A water mill has been recorded on the site since 1342 although the current mill dates from the late 18th century. A number of medieval millstones have been incorporated into the current building structure.
The mill retains all the original primary machinery, hurst frame, and two pairs of millstones. There also remains an adjustment mechanism known as tentering or lightering – which is carried out by a lighter staff (a timber lever). This represents an unusual survival of an early technique. The lighter staff was used to control the texture of the ground product by moving the upper millstone closer or further from the bedstone whilst milling.
Trelaske mill was originally a double wheel (in-line) overshot configuration fed from a very long (2km) leat taken off the River Inny and then via a common launder, a once familiar arrangement in the south-western counties of England.
Only one iron 14' diameter waterwheel now remains together with a portion of the upstream leat and spillway for taking excess water back to the River Inny.
The mill last operated commercially in 1952.