http://www.westernliner.com/retention-ponds.html - Details
westernliners: A retention pond is a term used for a catch-all pond. Retention ponds are basins that catch runoff from higher elevation areas. They help limit flooding and help remove pollutants from the surrounding environment.
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A retention pond is a term used for a catch-all pond. Retention ponds are basins that catch runoff from higher elevation areas. They help limit flooding and help remove pollutants from the surrounding environment.