Dam Safety

Home
Click here to search.
×

Common Problems at Dams - Inadequate Trash Rack

Probable Causes and Possible Consequences

Recommended Actions

  • Without a trash rack, intakes can become plugged with branches, logs, and other debris.
  • Trash rack openings that are too small will plug with leaves, weeds, and corn stalks.
  • Reduced discharge capacity will cause the reservoir to rise and possibly overtop the dam. Prolonged overtopping can cause dam failure.
  • Trash racks are also important to prevent children and livestock from falling into spillways.
  • The openings of a trash rack should be half the diameter of the spillway outlet pipe.
  • Trash racks should be sturdy, constructed of metal, and capable of withstanding the weight of a large log.
  • Install a metal trash rack that has been approved for use in Nebraska. View examples of approved trash racks for more information.

 

inadequate dam trash rack

A properly designed trash rack prevents large debris from entering a spillway that are too large to freely pass through, while at the same time, facilitating the passage of smaller trash. Trash racks will become plugged if the openings of the trash rack are too small to allow small debris, such as leaves and twigs, to pass. Trash racks are also important to prevent children and livestock from falling into spillways.

Need further information?

Contact the Division

Get email & text updates.

Sign Up