The Spirit Lake dilemma: Engineering a solution for a lake with a problematic outlet

When Mount St. Helens erupted on May 18, 1980, its northern flank collapsed, triggering the largest landslide in recorded history. A good portion of this debris avalanche tore through Spirit Lake. Within moments, the lake was violently altered. The picturesque recreation site, home to youth camps and visitor lodges was gone. When the debris avalanche […]