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Wisconsin Administrative Code (Last Updated: January 10, 2017) |
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Agency NR. Department of Natural Resources |
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Chapters 100-199. Environmental Protection – General |
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Chapter 151. Runoff Management |
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SubChapter III. Non-Agricultural Performance Standards |
Section 151.123. Peak discharge performance standard.
Latest version.
- (1) Requirement. By design, BMPs shall be employed to maintain or reduce the 1-year, 24-hour and the 2-year, 24-hour post-construction peak runoff discharge rates to the 1-year, 24-hour and the 2-year, 24-hour pre-development peak runoff discharge rates respectively, or to the maximum extent practicable. The runoff curve numbers in Table 2. shall be used to represent the actual pre-development condition. - See PDF for table(2) Exemptions. This section does not apply to the following:(a) A post-construction site where the discharge is directly into a lake over 5,000 acres or a stream or river segment draining more than 500 square miles.(b) Except as provided under s. NR 151.121 (5) , a redevelopment post-construction site.(c) An in-fill development area of less than 5 acres.
Note
Where the pre-development condition is a combination of woodland, grassland, or cropland, the runoff curve number should be pro-rated by area.
Microsoft Windows NT 6.1.7601 Service Pack 1
The intent of s.
NR 151.123
is to minimize streambank and shoreline erosion under bank-full conditions.
Microsoft Windows NT 6.1.7601 Service Pack 1