Whitchurch, Cardiff - History - Melingriffith Tin Works

Melingriffith Tin Works

Built in 1749, the Melingriffith Tin Plate Works in north Whitchurch, on the bank of the River Taff opposite Radyr, was built on or near the site of an old corn mill that had operated as far back as the late 12th century. Melingriffith was the largest working tin factory in the UK, until the much later construction of the Treforrest Tin Works.

The tin mills were powered exclusively by water drawn from the River Taff down the Melingriffith feeder stream, a water course that doubled as a canal that carried raw iron ore from the Pentyrch Iron Works until around 1815, when the Pentrych tramroad was completed. The tramroad crossed the River Taff over the Iron Bridge. The feeder’s lock was permanently closed in 1871 when it was bridged over, but traces of it still remain.

The tin works closed in 1957, and today the only signs that the works ever existed at all are the mostly dry bed of the original Melingriffith feeder stream that still runs down from the River Taff from just above the Radyr weir, and the recently restored water pump standing opposite Oak Cottage. The works site itself has been completely cleared, and is now a modern housing estate.

The Melingriffith feeder stream made its way to the original Glamorganshire Canal, where they ran in parallel through the tin works and out the other side at Melingriffith Lock. Where they had come together north of the tin works, any overflow from the canal was originally designed to empty into the feeder. This point is now at the southern end of the Glamorganshire Canal Local Nature Reserve and all the water from the canal runs into the feeder before disappearing into a piped water course that passes under the modern housing estate.

At the southern end of the housing estate, the feeder re-emerges at the point where the Melingriffith water pump stands, the pump originally designed to pump water from the feeder into the Canal at Melingriffith Lock. Today, the Glamorganshire Canal has been almost totally overbuilt. Ty Mawr Road has replaced the route of the canal from Melingriffith all the way to Whitchurch.