Sandy River
Marmot Dam Multimedia Gallery

Twenty minutes after breach Within twenty minutes after the breach, the gap is 15 feet wide and continues to widen and deepen. The mass of sediment built up behind Marmot Dam over 95 years resumes its downriver journey.

Bull Run Hydro: Pre-demolition Marmot Dam Marmot Dam fish ladder High runoff at Marmot Dam Bull Run Powerhouse Bull Run generator Wooden box flume Marmot Dam demolition Before the blast Marmot Dam explodes Dam explosion Dam demolition begins Demolition work Earthen dam breach Earthen coffer dam Breach begins Dam is breached Upstream view of breach Stream of water increases Water gathers force Twenty minutes after breach Videos Marmot Dam demolition ceremony (2:00) Time-lapse of concrete dam destruction (0:67) Dramatic breach of earthen dam (3:10) Time-lapse of washout (0:56)