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Bala Lake, Llyn Tegid
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£1.6m Dee headwaters project starts above Bala

September 2026 · Llyn Tegid and the Dee headwaters

A £1.6 million project on the Dee headwaters has started above Bala, with work aimed at holding water higher in the hills before it reaches Llyn Tegid and the river 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 burns above Bala rise in a few hours and the lake takes the pulse. Restoring the headwaters is meant to flatten that pulse: wetter ground, slower run off, cleaner water arriving at Llyn Tegid.

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 valley

The scheme sits beside the new source to sea walk on the Clwydian and Dee 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 Dee has a better chance of arriving at the valley as a river rather than a flush. Bala, the lake and the fisheries 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 Dee to rise more slowly from its own source.