WIDE BAY WATER CORPORATION HERVEY BAY LENTHALLS DAM (QLD) GATES FAILURE 2008 –
A CASE STUDY IN GATE RELIABILITY AND HUMAN FACTORS, FAILURE TO IMPLEMENT RISK MANAGEMENT PROCEDURE.
The Lenthalls Dam Crest gates were installed in 2007 and failed to operate as designed from January 2008. In February 2008 high rainfall led to a moderate flood event, all gates inoperable. The gates failed to lower to release flood water.
In this incident, manual operation of the gates did not occur, it is believed the mechanism was not operable. The operating authority failed to implement the Emergency Action Plan and failed to evacuate flood impacted upstream sites. Three persons were put at risk due to upstream flooding.
Had the flooding been more prolonged or severe the persons trapped faced injury or death.
Australia has a strong reputation with respect Dam Safety and Incident management, this near fatal incident offers an opportunity to review and amend existing Dam Safety Requirements, Risk Management and Gate Reliability Criteria.
This incident provides an opportunity to review all current guidelines and enhance Dam Safety standards with emphasis on the importance of mitigating human failure and ensuring public safety.
For the Lenthalls Dam Gates Failure Research paper and the Gutteridge Haskins & Davies (GHD) Blank Emergency Action Plan for Wide Bay Water Corporation, City of Hervey Bay (Local Government Owned Corporation providing water and wastewater services), please refer to the links below. (requires Adobe Reader)
Click here to read the report and click here to view the Wide Bay Water Corporation Blank Emergency Action Plan prepared by Gutteridge Haskins & Davies (GHD).
Wide Bay Water Corporation Water Services Provider DRAFT Version of the Operation Manual for Lenthals Dam (prepared by Gutteridge Haskins & Davies) GHD and the Chief Executives Officers Responsibilty (Tim Waldron CEO).
Click here to read an extract of the Click here to read Wide Bay Burnett Conservation Council’s letter to the Minister Queensland State Government Department of Natural Resources and Water regarding Wide Bay Water Corporation (Local Government Owned Corporation) of former Hervey Bay City Council now Fraser Coast Regional Council and Interium Resource Operatiors Licence in 2004 and the innundation of Wongi Waterholes due to Lenthals Dam Gates failure to operate.
Sourced and published by Henry Sapiecha 20th April 2009