A friend of mine asked me to complete the pre and post construction runoff calculations for this proposed 0.53 acre site. They are constructing a 45x70 metal building. The parking lot is existing, and other than that the existing pre-construction conditions are empty grass lot.
The county in question wants to see net zero increase to runoff, post construction. Any ideas? A detention pond for a development this size seems to be overkill.
There is a drainage swale on the north end of the property that runs the entire length to the main ditch by the road.
The county in question wants to see net zero increase to runoff, post construction. Any ideas? A detention pond for a development this size seems to be overkill.
There is a drainage swale on the north end of the property that runs the entire length to the main ditch by the road.
