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Old 01-12-2012, 12:08 PM
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Join Date: Jun 2008
Location: Pensacola, Florida
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Judging from the picture that was posted, a hydrostatic relief valve or drain tiles may not be needed. The pond is obviously on a slope, so there should not be any great water accumulation. Any risk that may occur in a very heavy rainfall will be dictated by the present soil substrate permeability and/or the present depth of the impermeable layer or bedrock.

If this location is part of the watershed of a nearby public waterway, permitting may or may not be required for the installation of an overflow.
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