Construction work is completed on the Government Contract issued by The Corps of Engineers on a new monitoring system to keep an eye on seepage at Blakeley Mountain Dam.
of a 2 million dollar seepage collection system consisting of an impervious
berm with 10 manholes, ditches, and a V-notch weir was completed in October
2009 to monitor flow through the dam.
United States Army Core of Engineers will monitor the Lake Ouachita's
Blakely Mountain Dam with installation of the new Equipment. U.S.
In the wake of the regular 2005 inspection, engineers discovered
that a layer of filter material had been installed incorrectly when the dam
was originally built in 1953.
This will expose the piping system under Blakely Mountain Dam that allows seepage so the water can be channeled and the measuring system installed.
For more information contact Frank Worley, Deputy, Public Affairs, (601) 631- 5053 Information courtesy of U.S. Army Corps of Engineers
In May 2006, as part of the dam safety program, a risk assessment screening was performed for Blakely Mountain Dam at Lake Ouachita. This screening determined the dam may be at risk for failure from seepage and piping due to construction methods and the apparent lack of an adequate seepage blanket.
This resulted in the dam being classified as Dam Safety Action Classification II (DSAC II).
The DSAC II dams are unsafe or potentially unsafe. Interim risk reduction measures are required to be implemented for dams with this classification. A seepage monitoring system has been designed to evaluate any deterioration of the core material.
It will take a minimum of two years to determine the dam's condition and fully recommend risk reduction measures.
Depending on that determination it could be numerous additional years to reclassify the dam from DSAC II to III or IV. Corps Dam Safety policies do not allow raising the flood pool at lakes with a dam classified as DSAC II or DSAC I.
Since Blakely Dam cannot be reclassified to a higher DSAC classification in
a timely fashion.
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