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--- disconnected_impervious [2023/02/20 12:57] – created admin
+++ disconnected_impervious [2023/02/20 12:59] (current) – admin
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   - The pervious area must receive runoff in a sheet flow manner across an impervious area with a pervious width at least as wide as the contributing impervious source area.
-Disconnection of rooftops from one- and two-family residential buildings may be assumed provided the runoff has a flow length of at least 20 feet over a pervious area in good condition.
+One- and two-family rooftop runoff may be assumed disconnected provided the runoff has a flow length of at least 20 feet over a pervious area in good condition.
 The percent of disconnected impervious should be no greater than that in the appropriate WinSLAMM standard land use files, unless the percent disconnection is known at the time of plan development.