For many years , Black Eagle Dam 's owners were required to hold simulations every five years to plan for various kinds of emergencies ( flood , sabotage , mechanical breakdown , etc. ) which might affect the dam and public safety . After the September 11 attacks , these exercises were required to happen every year . PPL Montana works with local and state government and law enforcement , other companies , and the news media to plan for various contingencies and improve how it might respond in a disaster or emergency
September 11 attacks
September 11 attacks
Black Eagle Dam