Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

When is a stormwater management system required to provide attenuation for the 2-year/24-hour storm event?

April 26, 2017attenuation event Management storm stormwater system

0

Posted

When is a stormwater management system required to provide attenuation for the 2-year/24-hour storm event?

1 Answer

0

Posted

For systems serving new construction that is greater than 50 percent impervious over the project area, the post-development peak discharge rate must not exceed the pre-development peak discharge rate for the 2-year, 24-hour design storm event. When calculating the impervious area for this purpose, exclude water bodies and the area providing stormwater treatment.