The Brecon Beacons National Park was designated in 1959 and covers a large area of southern Wales. Including the uplands of the Beacons themselves, it also encompasses Black Mountain and Fforest Fawr to the west, the fringes of the industrial valleys to the south, the Usk
Valley and the Black Mountains in the east.
One of National Grid’s overhead lines runs through the southern area of the National Park. The independent landscape assessment concluded that one section of the transmission line has landscape and visual impacts of very high importance. The subsection starts on the upper northern slopes of the Clydach Gorge near Blackrock from which point the line spans over the gorge to the south and then continues along the mid to upper southern slopes along the gorge towards the Usk Valley.
A study looking at the options to mitigate the impact of National Grid's transmission overhead line.
At the Stakeholder Advisory Group meeting in September 2015, the section of line near Abergavenny in the Brecon Beacons National Park was not prioritised as one of the four sections of line in England and Wales to be taken forward as a potential undergrounding project.
Although four sections have been prioritised and are now subject to detailed technical feasibility, it is possible that they could still fall away for a number of reasons. Should a project fall away then the Stakeholder Advisory Group will select another project from the shortlist of 12 to take its place.
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