Commission reviews draft definitions for 'impervious surface' and 'lot coverage' amid stormwater concerns
Staff presented draft definitions of impervious surfaces and lot coverage aimed at consistent stormwater management; commissioners asked whether gravel or compacted earth should count as impervious, and whether the definitions should link explicitly to state stormwater guidance and differential application by district.
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Planning staff read proposed definitions for "impervious surface" and "lot coverage," saying the definitions help manage stormwater runoff and provide consistency for permit review. The draft defined impervious surface as material that "impedes or prevents the natural infiltration of water into the soil, including, but not limited to, rooftops, streets, driveways, sidewalks, walkways, patios, and similar hard surfaces" and described lot coverage as "the portion or percentage of a lot covered by buildings, structures, and man-made impervious surface materials."
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