River Brenig
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The River Brenig (Afon Brenig) is a tributary river of the River Teifi and runs through the market town of Tregaron in Ceredigion, Wales.
It is formed from the confluence of the Afon Groes and Afon Berwyn in the foothills of the Cambrian Mountains.[citation needed]
The Brenig meets the River Teifi just below Tregaron.[1]: 21
Hydrology

Between 2008 and 2010, a £2.7m development project by Environment Agency Wales began in Tregaron to protect the town from the river flooding. This involved lowering the riverbed and building floodgates, as well as implementing improvements to existing floodwalls.[2]