Stormwater Retention Pond Liners - westernliner.com
A retention pond or 'wet pond' is designed to hold water continuously, and only partially drains any incoming surge of storm water. A detention pond is designed purely to capture the surging storm water, and to release it to a water management system at a manageable pace, and with storm debris cleaned out, etc - subsequently becoming a 'dry pond' until the next storm.
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