By Encorporating new technologies such as porous paving and rain gardens we can filter, retain and distrubute runoff to assimilate pre-developement conditions. We have the technical background for flood plain and runoff modeling, we are adept  at using HydroCad, PondPak, TR55 and the Airport methodologies in modeling pre and post developed conditions. 

We regularly work with State Engineers in permitting of projects to comply with Statue 420-D and Chapter 500 of MDEP requirements.

The Maine Department of Environmental Protection has published much more information on this topic: Maine Stormwater Best Management Practices Manual