Ancient Monuments

History on the Ground

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Hafna Lead Mine Mill

A Scheduled Monument in Trefriw, Conwy

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Latitude: 53.1242 / 53°7'27"N

Longitude: -3.8236 / 3°49'24"W

OS Eastings: 278070

OS Northings: 360115

OS Grid: SH780601

Mapcode National: GBR 63.71PX

Mapcode Global: WH65X.7QHR

Entry Name: Hafna Lead Mine Mill

Scheduled Date: 31 August 2001

Source: Cadw

Source ID: 3846

Cadw Legacy ID: CN326

Schedule Class: Industrial

Category: Lead mine

Period: Post Medieval/Modern

County: Conwy

Community: Trefriw

Traditional County: Caernarfonshire


The monument comprises the consolidated remains of a major nineteenth-century lead processing mill. In the 1860s a water-wheel drive crushing floor was erected, which in the 1880s was superseded by a stone-built gravity-fed mill in tiers up the hillside. This mill was extended in 1893-4 and 1907 and operated until 1915. The mill is unique within north-west Wales in combining mechanical, physical and chemical processes, together with a tuyere furnace smelter. The bases of the machinery survive, together with parts of the furnace, the sites of a steam and gas engine, ore bins, spoil tips and a visually impressive chimney. An incline passes through the site and there is a capped shaft at the top. Hafna Lead Mine was worked since at least the eighteenth century.

The monument is an outstanding surviving metal processing site associated with an important mine. The monument is of national importance for its potential to enhance and illustrate our knowledge and understanding of mining technology from a single period. Lead mines may be part of a larger cluster of industrial monuments and their importance can further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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