Please respond if you have comments: Site is less than 1/2 ac. on a corner lot which has been used for the past 28 years as a used car sales lot at the intersection of two public roads. The site before demolition consisted of two buildings, concrete driveways & sidewalks, an asphalt car display area, and the balance of being a compacted gravel parking. Slope averages 2% and runoff is sheet flow toward adjacent properties. New owner wants to keep the site as a used car lot, but improve with a new building. The parking lot must be fully paved with concrete curbing, and landscaping on all perimeters in accordance with City regulations. Using NRCS Curve Numbers we provided a layout that met the Post-Dev. runoff did not exceed the Pre-Dev. runoff. After submitting the plan & drainage data the City disputed the Pre-Dev. calculations. We revised the plan to reduce the amount of pavement and thus the drainage even more. The city has now said we must evaluate pre-development drainage and evaluate the site ignoring the compacted gravel areas as such and using residential lot with grass numbers instead. Has anyone else run into this and how it was addressed? The owner is talking legal action. I'm not too sure he's wrong. Thanks.
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