 The cause of the landslide was determined to be settlement of the earth due to inadequate ground reinforcement in the construction and excavation of the car park 30 years previously.On 7 July 2009, a rock landslide fell onto the CG-3 main road between La Massana and Andorra La Vella, blocking the road near the entrance to the Pont Pla Tunnel for three hours.Protective nets on the mountain side caught most of the rockfall, but went over the nets and fell onto the road and pavement.