La Colle Falls - dam construction
La Colle Falls
La Colle Falls - lowering construction materials
La Colle Falls - dam construction building
La Colle Falls
La Colle Falls
La Colle Falls - "framework n. wall of lock"
La Colle Falls - "crack in north wall of lock"
La Colle Falls
La Colle Falls
La Colle Falls - "n. wall of lock"
La Colle Falls - "n. wall of lock"
La Colle Falls
La Colle Falls
La Colle Falls
La Colle Falls - "closure openings"