Embankment Dam A dam structure constructed of fill material, usually earth or rock, placed with sloping sides and usually with a length greater than its height. Types of embankment dams include: 1 Earthfill or Earth Dam – An embankment dam in which more than 50 percent of the total volume is formed of compacted fine-grained material obtained from a borrow area (i.e., excavation pit), 2 Fill Dam – Any dam constructed of excavated natural materials or of industrial waste materials, 3 Homogeneous Earthfill Dam – An embankment dam constructed of similar earth material throughout, except for the possible inclusion of internal drains or drainage blankets, distinguished from a Zoned Earthfill Dam, 4 Hydraulic Fill Dam – An embankment dam constructed of materials, often dredged, that are conveyed and placed by suspension in flowing water, 5 Rockfill Dam – An embankment dam in which more than 50 percent of the total volume is comprised of compacted or dumped pervious natural or crushed rock, 6 Rolled Fill Dam – An embankment dam of earth or rock in which the material is placed in layers and compacted by using rollers or rolling equipment, and 7 Zoned Embankment Dam – An embankment dam which is composed of zones of selected materials having different degrees of porosity, permeability, and density.
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Author of the Water Words Dictionary source of text: Gary A. Horton
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