 In the Blons area approximately half a million trees have been planted, four fifths of which are Picea abies.This abies tree species is effective in avalanche protection due its capability in ensuring stabilisation because of its deep root system that can reach a depth of up to 2 metres.At the main starting points of avalanches in Blons, approximately 6.5 kilometres of defence mechanisms have since been put in place including steel snow bridges, hangings and steel-wood construction as well as 315 creeping snow constructions and 745 metres worth of wind drift barriers.