A 45-year-old man from Kent has been charged with causing the death by dangerous driving of a teenager who died during floods in September 2008.
Louise Ferreira, 17, from Thamesmead, south east London died when the 4x4 she was in overturned into a swollen river.
She was with a group who were travelling off-road on a holiday to celebrate her exam results.
The vehicle left a flooded forestry track near the Llyn Brianne reservoir in mid Wales.
Dyfed-Powys Police said the man who has been charged will appear in court at Llandrindod Wells on 2 December.