Powys County Council has refused plans for a wind farm near Llanbadarn Fynydd, in Radnorshire.
Developer RES says the Garreg Lwyd Hill Wind Farm proposal consists of 23 turbines, at a maximum height of 126.5m, which would generate enough electricity to power more than half of the homes in Powys.
It is located within an area designated by the Welsh Government for renewable energy development.
Members of the authority's planning committee have unanimously voted to refuse consent to the application today.
More top news
Mostly dry with clear spells developing tonight in the north, which will allow some mist and fog patches to form.
It's usually something reserved for the coast, but today the Pro Surf Challenge added a stop at Snowdonia to its tour.
An ambulance crew was attending an emergency call in Newport when they had fireworks thrown at them.