La Colle Falls - dam construction
La Colle Falls
La Colle Falls - lowering construction materials
La Colle Falls
La Colle Falls - "crack in north wall of lock"
La Colle Falls
La Colle Falls
La Colle Falls
La Colle Falls - "closure openings"
La Colle Falls - "tail race excavation"
La Colle Falls - "lock looking downstream"
La Colle Falls - "tail race excavation"
La Colle Falls - "first breach in upstream coffer dam"
La Colle Falls - "coffer dam removed"
La Colle Falls - "blowing out coffer dam"
