History in Structure

This site is entirely user-supported. See how you can help.

Dam and drive across Nant Meigan on Baron Hill estate

A Grade II Listed Building in Beaumaris, Isle of Anglesey

We don't have any photos of this building yet. Why don't you be the first to send us one?

Upload Photo »

Approximate Location Map
Large Map »


Latitude: 53.262 / 53°15'43"N

Longitude: -4.1049 / 4°6'17"W

OS Eastings: 259700

OS Northings: 375959

OS Grid: SH597759

Mapcode National: GBR JN72.GFY

Mapcode Global: WH541.X8GL

Entry Name: Dam and drive across Nant Meigan on Baron Hill estate

Listing Date: 13 July 2005

Last Amended: 13 July 2005

Grade: II

Source: Cadw

Source ID: 84769

Building Class: Water Supply and Drainage

Location: Reached along Mill Lane and then a path running W along the banks of the Meigan brook which passes the remains of Town Mills (slate mill) with its leat running from below the dam.

County: Isle of Anglesey

Community: Beaumaris (Biwmares)

Community: Beaumaris

Locality: Nant y Felin

Built-Up Area: Beaumaris

Traditional County: Anglesey

Find accommodation in


Built in its present Piranesian form in the 1840s as part of a new picturesque drive to Baron Hill from the ornamental gates at Garth Lodge, on the A545 just over two kilometres to SW of Beaumaris town.


Monumental masonry dam closing the head of Nant y felin and impounding the stream for industrial and picturesque purposes. Coursed and random masonry (approx 14m high) with heavily battered profile and four large raked buttresses. At mid-height level, there is a segmentally-arched and brick-vaulted tunnel with projecting stone sill to the main water outlet with ramped spillway between the buttresses. Low down to right is a second outfall under a long (now split) lintel which formerly fed the stone-lined leat running downhill to the former slate dressing mill (rebuilt in 1675). Driveway is carried on top with pond to upper side of dam and then continues N to bridge over B5109 and the ruins of Baron Hill beyond.

Reasons for Listing

Listed for its special interest as a monumental mid C19 estate dam of definite quality and character, and as an integral part of the estate at Baron Hill.

Other nearby listed buildings

BritishListedBuildings.co.uk is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact BritishListedBuildings.co.uk for any queries related to any individual listed building, planning permission related to listed buildings or the listing process itself.

British Listed Buildings is a Good Stuff website.