Our premilimary review comments for V2009 noted that "Reduction in quantity (SSc6.1) will require stormwater to be infiltrates or re-used onsite.

Hi all,

Has anyone been successful applying the impounding/receiving stream protection approach for a previously >50% impervious site?

The project I’m referring to is a LEED 2009 New Construction project, and has already been sent for the design review and received back with review comments.

A recently registered project of mine has the most updated version (5.0) of the credit forms for SSc6.1.

Hi, The requirements for Option 2 (case 1) of this credit refer to the protection of receiving stream channels.

Thank you for all of the information provided on this forum. I am confident in all of our calculations up to the Storm Interval and Drawdown calculations.

page 95 of the LEED manual (description of case 1 - option 2) states that post development runoff rate and quantity must be below "critical values" for the relevant receiving waterways.

Hello, Our project is based on the case 2.

As part of NYC's blue roof requirement, roofs must provide 24 hour detention detention for the 2-yr design storm and an equivalent peak runoff rate equal to a curve # of approx 50 for projects disc