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Encyclopedia :: encyclopedia : Dam (Site not responding. Last check: 2007-10-10) |
 | | Rock-fill dams are embankments of loose rock with either a watertight upstream face of concrete slabs or timber or a watertight core. |
| | Earth dams, also called earthen and earth-fill dams, are constructed as a simple homogeneous embankment of well-compacted earth, sometimes with a watertight concrete or clay core or upstream face, or sometimes with a hydraulic fill to produce a watertight core. |
| | A type of temporary earth dam occasionally used in high latitudes is the frozen-core dam, in which a coolant is circulated through pipes inside the dam to maintain a watertight region of permafrost within it. |
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