The controlled demolition of three disused 80 metre tall reinforced concrete chimneys at Coolkeeragh Power Station Northern Ireland has been successfully achieved by Churchill Steeplejacks (UK) Ltd over a nine month period. On this particular project, explosives could not be used to fell the chimneys due to a number of factors including a nearby under ground culvert providing water to the new adjacent power station and a railway line located within 15 metres of the chimney bases.
The full story of the contract can be found here but, perhaps better still, Churchill have produced a pair of excellent videos that capture the action.