Forum discussion
CS-2009 SSc6.1: Stormwater Design—Quantity Control
My question is. The Guide says choose Case 1 Sites with Existing Imperviousness 50%or less or Case 2 Sites with Existing Imperviousness greater than 50%.
Refers the Existing Imperviousness [%] to Pre or Post development of the site?
Our project is located on a green space with large parts of meadow. Must we use Case 1 or Case 2.
Thank you for any suggestions.
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Emily Catacchio
Sustainability SpecialistWight and Company
610 thumbs up
February 10, 2012 - 8:22 pm
Existing means "pre," as in, before your project. Does that help?