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Pen y Fan seen from Cribyn in the Brecon Beacons
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£1.6m Taff headwaters project starts above the Beacons

September 2026 · Bannau Brycheiniog and the Taff headwaters · Liberty Lux News

A £1.6 million project on the Taff headwaters has started above the Beacons, with work aimed at holding water higher in the hills before it reaches the river and the city below. The first teams are on the ground this month, blocking old drains, easing bare peat and fencing stretches of bank that have been trampled for years.

The money is modest by national standards. On this ground it is enough to change how rain leaves the mountain. Partners say the point is not a new reservoir. It is to make the existing blanket of peat and rush do the job it used to do, slowly and out of sight.

Hold the water up there

Drained peat sheds water fast. After heavy rain the streams above the Beacons rise in a few hours and the Taff takes the pulse through Merthyr and Pontypridd. Restoring the headwaters is meant to flatten that pulse: wetter ground, slower run off, cleaner water arriving in the valley.

Farmers on the higher grazings have been asked to move stock off the wettest edges while the work is done. Most of the agreements are short and paid. The worry, as ever, is what happens when the project ends and the fences need a second life.

From source to the bay

The scheme sits beside the new source to bay walk on the Beacons and Taff paths. Walkers will see some of the work from the ridge: coir rolls, small dams in old grips, and stretches of bank that look messier before they look better. That is the honest look of a repair, not a park.

Downstream towns will not feel a difference this winter. The claim is longer than that. If the headwaters hold more of a storm, the Taff has a better chance of arriving at Cardiff as a river rather than a flush. The valley, the fisheries and the flood wall planners all have a stake in that.

For now the story is a line of workers above the water, and a budget that has to stretch across wet ground. £1.6 million will not remake the mountain. It can start to teach the Taff to rise more slowly from its own source.