||Dam Assessment Report (Task 3): Marshall Steam Station Coal Ash Rentention Dam, Catawba County, North Carolina, Project No. 0-381.
F. S. Vetere
||GZA GeoEnvironmental, Inc., Newton, MA.; Lockheed Martin Services, Inc., Edison, NJ.
North Carolina ;
Coal ash ;
Retention dams ;
Hazard classification ;
Visual inspection ;
Marshall Steam Station Coal Ash Retention Dam ;
Catawba County(North Carolina) ;
Terrell(North Carolina) ;
Duke energy company
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||This Phase I Inspection/Evaluation Report details the results of a visual dam inspection of the Marshall Steam Station Coal Ash Retention Dam (MA01161) located on State Route 150 in Catawba County, North Carolina. The inspection was performed on May 28, 2009 by GZA GeoEnvironmental, Inc (GZA). The Marshall Steam Station Coal Ash Retention Dam has a maximum structural height of dam of approximately feet. In accordance with the U.S. Army Corps of Engineers (COE) guidelines, this dam is an Intermediate size structure. However, under criteria listed in the North Carolina Dam Safety Regulations, the dam would be classified as a Large size structure. The original Hazard Potential Classification for the Marshall Steam Station Coal Ash Retention Dam was Low under the COE and State of North Carolina criteria. Damage to North Carolina Highway 150 could possibly occur should there be a failure, and loss of life was not expected. However, the State of North Carolina revised the Hazard Potential Classification to High in 1984 due to the probable environmental damage to the adjacent waters of Lake Norman, the public financial loss, and the interruption of services from a dam failure. Per the EPA criteria the hazard classification would be considered Significant. The dam was judged to be in FAIR condition in GZAs opinion. At the time of the inspection water was flowing over the Discharge Tower Structure stoplogs, and the outlet in the discharge canal to Lake Norman was submerged.
||Sponsored by Lockheed Martin Services, Inc., Edison, NJ.
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|PUB Date Free Form
||15 Sep 2009
||50B; 97R; 68C