Sheryl Diggle said Troedrhiwfuwch was a “lovely little village and community” and she remembers the day they were told “the mountain was moving” and had to leave.
“I didn’t mind too much because I was happy to come back up the valley to my roots, but a lot of the villagers there felt let down,” she said.
The council acknowledged a previous three-month closure of the road in 2014 caused “significant disruption” to businesses and residents.
A council report also said proposals to build alternative routes – with estimated a budget of between £75m to £85m – were considered in 2016.
None of those plans were taken forward and the council said the planned repairs would secure the long-term future of the A469 at Troedrhiwfuwch, “protect the local communities it serves” and ensure the transport infrastructure is “future-proofed” against climate change.