Worthville dam incident randleman nc
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Worthville Dam Incident Randleman, NC. 6/16/2013. Timeline. 13:05 – 9-1-1 caller reported “water gushing through a large hole” in the bottom of the dam, and several people were swimming around it. Law enforcement responded.

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Worthville Dam Incident Randleman, NC

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Worthville Dam IncidentRandleman, NC

6/16/2013


Timeline

  • 13:05 – 9-1-1 caller reported “water gushing through a large hole” in the bottom of the dam, and several people were swimming around it. Law enforcement responded.

  • 20:38 – 9-1-1 caller reported a dam had structural damage and was possibly in danger of collapsing. Fire Department/EM responded.

  • 21:07 – State EOC notified.

  • 00:15 – DENR Inspector on Scene


Size Up - Situation

  • Water was gushing from the bottom of the dam.

  • Water level above dam was dropping at an estimated rate of 3”-5” per hour.

  • Water level was down approximately 2’-3’ upon EM arrival.


Size Up – The Dam

22 surface acres of water behind the dam

20’ tall

83 acre/ft = 3.6 million cubic ft

230’ long


Size Up – Worst Case Scenario

H x 0.5=W at Breach


Size Up – Downstream


Size Up – Downstream

0.7 miles downstream.


Size Up – Downstream

1.6 miles downstream.


DENR Expertise

50% water

50% silt


Next Day


Next Day


Next Day


Next Afternoon


Next Week


Next Week


Where are the hazards?

  • 204 dams recognized in Randolph County.

  • 56 listed as high/intermediate hazard.

  • Only 4 have EAP’s.

  • 5,646 dams recognized in North Carolina.


What to Do to Be Ready(er)

THE BASICS

  • Identify dam’s in your jurisdiction

  • Work with GIS

  • Identify potential problematic locations downstream in a worst case scenario.

    EXTRA CREDIT

  • Photograph and file

  • Work with dam owners and encourage EAPs.

  • Build predetermined layers for mass notification systems.


Resources

NCDENR Land Quality Dam Program

http://portal.ncdenr.org/web/lr/dams

DamSafetyAction.org

http://www.damsafetyaction.org/NC/index.php


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