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Furnace Dam

A Grade II Listed Building in Tintern, Monmouthshire

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Latitude: 51.6987 / 51°41'55"N

Longitude: -2.7023 / 2°42'8"W

OS Eastings: 351561

OS Northings: 200233

OS Grid: SO515002

Mapcode National: GBR JL.40ZN

Mapcode Global: VH87F.3KSL

Entry Name: Furnace Dam

Listing Date: 29 September 2000

Last Amended: 9 October 2001

Grade: II

Source: Cadw

Source ID: 24055

Building Class: Water Supply and Drainage

Location: Situated on the south side of the Devauden road about 50m south west of Furnace Farm.

County: Monmouthshire

Town: Chepstow

Community: Tintern (Tyndyrn)

Community: Tintern

Locality: Old Furnace

Traditional County: Monmouthshire

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This dam was constructed to provide power for the Tilting Mill which was probably immediately below it. Little is known about this mill but the dam is probably at least C18 in origin.


The dam is constructed of rubble sandstone walling with concrete abutment to far bank. The near end of dam has a low arch with elliptical head for the sluice. Two centre openings with rubble sides and varying sills to spillways. The fourth opening to far bank is now blocked with concrete and the rubble sides have collapsed downstream. The centre spillway has low parapets flanking the projecting ramp. The dam provides a 2-2.5m head of water in its current state. The dam is about 40m long and about 2.5m wide. Modern wooden bridge on top of dam.

Reasons for Listing

Included as a small mill dam dating possibly from the C18, and as a part of an important group of surviving relics of the metal industry in the Anghidy valley.

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Other nearby listed buildings

  • II Furnace Cottages
    Situated on the south side of Forge Road about 50m south of the Old Furnace.
  • II Beaufort Pond Dam
    About 500m above Old Furnace with the Trellech road crossing the dam crest.
  • II Barn at Fairoak Farm
    Situated about 2000m west of Tintern Abbey at the junction of the road to St Arvans with the road to The Cot.
  • II Penterry House
    About 1000m west of Tintern Abbey high up on the hill and approached by the forest road through Glyn Wood.
  • II Retaining Wall/Dam of Holding Pond at the Old Wire Works
    About 500m west of Tintern Cross at the west end of the Old Wireworks site.
  • II Fish Pool Dam
    About 3000m west of Tintern Abbey beside the road to Devauden.
  • II The Bay
    Set back from the main road approximately 0.5km north of Tintern Abbey and opposite the former Abbey mill. Immediately on the north side of the A466 bridge over the Anghidy River.
  • II Crown Lodge
    About 200m west of Tintern Cross.

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