Golden Dagger Mine

Overview

Golden Dagger, tucked into the Redwater Valley south of the Warren House Inn, was the last mine on Dartmoor to work commercially, closing in 1930 — bringing to an end a tin-streaming and mining tradition on the moor stretching back to the 15th century.

History

The wider Birch Tor and Vitifer mining area, of which Golden Dagger formed the southernmost part, had been worked for tin since at least the 15th century, initially by streaming alluvial tin from the valley gravels before miners began digging underground to chase the lode from around the 1750s. Golden Dagger itself was worked from 1879 by Moses Bawden, with between 30 and 40 men employed during its more active periods; intermittent working between 1882 and 1914 produced around 220 tons of black tin. The mine takes its name from a Bronze Age dagger found on the site by early prospectors, reputedly taken to Plymouth Museum and rumoured to have been destroyed in the city's bombing during the Second World War. Work continued on a reduced scale after the First World War, with recovery from old spoil tips keeping the site active even as underground working declined, before Golden Dagger finally closed in November 1930 — Dartmoor's last commercially worked mine — as low tin prices made continued operation unviable.

Geology

The mine worked tin-bearing lodes within the granite of the Dartmoor batholith, part of the same Cornubian granite intrusion responsible for the tin and copper mineralisation of Cornwall and west Devon.

Geological setting: Hydrothermal Deposits (well documented example), Veins and Lodes (well documented example)

Workings

Ore was worked from open-cast cuts and several shafts on the western side of the valley, with an adit driven to work and drain the lode; tin ore was hauled out along the adit using wagons on rails.

Closure

Golden Dagger closed in November 1930 owing to the low price of tin, the last mine on Dartmoor to be worked commercially.

What remains

The adit entrance, now blocked by a land slip, survives along with the remains of the mine's dry (changing house) and other surface workings across the valley side.

Abandoned workings can be dangerous — unstable ground, uncapped shafts, flooding and bad air are common even where a site looks safe from the surface. This entry describes history and general location only; it is not an access guide.

Recorded claims

Individual factual claims, each attached to the source(s) that support it below. Where sources disagree, both are kept.

• Intermittent working between 1882 and 1914 produced around 220 tons of black tin, with 30-40 men employed during active periods. ^1,2
• Golden Dagger closed in November 1930, the last mine on Dartmoor to be worked commercially. ¹

Images

Sources

1. (secondary) Golden Dagger Mine and Miners — Dartmoor Explorations
2. (secondary) Mining in Devon Database - Golden Dagger Mine — Devon in Focus
3. (primary) Golden Dagger mine plan — British Geological Survey / The Coal Authority

Record created: 24 August 2026 · Last researched: 24 August 2026