Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Johnsonville Fossil Plant Dike Stabilization. Humphreys County, Tennessee. Environmental Assessment
Tennessee Valley Authority (TVA) proposes to enhance the stability of approximately 1,600 linear feet of a dike that supports the northeast side of an ash storage area located at its Johnsonville Fossil Plant (JOF) near New Johnsonville in Humphreys County, Tennessee. The proposed project would include clearing vegetative cover and riprap from the existing dike face; extending the thickness of the dike wall both above and below the normal summer and winter pool elevations (approx. 359 feet and 354 feet, respectively) with riprap and clay; and stabilizing the dike surface by seeding to establish a vegetative cover. Construction activities would begin February 2010 and would be complete by June 2010. The proposed project is necessary to meet safety standards set by the U.S. Army Corps of Engineers (USACE) as well as to allow TVA to perform routine dike maintenance without affecting slope stability. From geotechnical borings, TVA has determined that the subject dike section to be stabilized has a factor of safety less than 1.5. The proposed action is needed to increase the factor of safety to greater than 1.5 to prevent potential failure. A minimum static safety factor of 1.5 or greater has been determined to be sufficient for coal ash dikes. The engineering term 'safety factor' describes the structural capacity of a system beyond the applied loads or actual loads. A summary of the scope of the geotechnical exploration and stability analysis is contained in Attachment A.
Johnsonville Fossil Plant Dike Stabilization. Humphreys County, Tennessee. Environmental Assessment
Tennessee Valley Authority (TVA) proposes to enhance the stability of approximately 1,600 linear feet of a dike that supports the northeast side of an ash storage area located at its Johnsonville Fossil Plant (JOF) near New Johnsonville in Humphreys County, Tennessee. The proposed project would include clearing vegetative cover and riprap from the existing dike face; extending the thickness of the dike wall both above and below the normal summer and winter pool elevations (approx. 359 feet and 354 feet, respectively) with riprap and clay; and stabilizing the dike surface by seeding to establish a vegetative cover. Construction activities would begin February 2010 and would be complete by June 2010. The proposed project is necessary to meet safety standards set by the U.S. Army Corps of Engineers (USACE) as well as to allow TVA to perform routine dike maintenance without affecting slope stability. From geotechnical borings, TVA has determined that the subject dike section to be stabilized has a factor of safety less than 1.5. The proposed action is needed to increase the factor of safety to greater than 1.5 to prevent potential failure. A minimum static safety factor of 1.5 or greater has been determined to be sufficient for coal ash dikes. The engineering term 'safety factor' describes the structural capacity of a system beyond the applied loads or actual loads. A summary of the scope of the geotechnical exploration and stability analysis is contained in Attachment A.
Johnsonville Fossil Plant Dike Stabilization. Humphreys County, Tennessee. Environmental Assessment
2010
141 pages
Report
Keine Angabe
Englisch
Civil Engineering , Hydrology & Limnology , Water Pollution & Control , Ecology , Envioronmental assessments , Dike stabilization , Vegetation , Riprap , Geotechnical exploration , Stability analysis , Vegetative covers , Safety factors , Terrestrial ecology , Johnsonville Fossil Plant , Coal ash dikes , Ash storage areas , Humphreys County (Tennessee)
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