Sandy River
Marmot Dam Multimedia Gallery

The historic demolition of Marmot Dam began in July 2007 with the detonation of 4,400 pounds of ammonium nitrate and dynamite to remove the top of the dam.

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)