Lessons Learned

High and significant hazard embankment dams should have internal filter and seepage collection systems.

Intervention can stop or minimize consequences of a dam failure. Warning signs should not be ignored.

Many earth-cut spillways have been constructed in erodible material that can result in unsatisfactory performance and breaching of the spillway

Natural dams can form quickly through processes such as landslides, avalanches, and river ice jams. In some cases, the formation of natural dams requires prompt intervention to protect people and property.

Regular operation, maintenance, and inspection of dams is important to the early detection and prevention of dam failure.

Seepage along penetrations through embankment dams should be controlled using a filter diaphragm instead of anti-seep collars.

Site security is a critical aspect of dam safety that shouldn't be overlooked or disregarded.

Stability of the dam foundation and other geologic features must be considered during dam design.