What is a detention area, the differences between Detention and Retention Ponds

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I wanted to talk about the detention areas.  You'll hear people refer to areas that it is a designed and engineered detention area. What's the difference between a retention pond? A detention pond? We're going to go over that right now.

A retention pond holds water all the time. It'll always have water in it.  Whereas a detention pond or area, it'll hold water after a rain for a little bit and then it dries up. Usually, these are here because before construction, before development, there was found wetlands and they have to create these detention ponds and retention ponds. 

This is a detention area now as the water runs out of the street, the cobble rock breaks the speed and velocity at which the water's flowing so that there's not high erosion in through the bed at areas where the detention area has been created and you don't end up with all the bark just washing away and eroding. [...]

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