Section E: Floodplain Management
If you answered "yes" to Section E, Question 2 of the PDM Environmental and Historic Preservation Questions, there are two important things to attach to your application as support documentation, if possible. Many of these items may already be included as part of your documentation in Section C or D of the PDM Environmental and Historic Preservation Questions. It is not necessary to provide the information again, but please reference it in the comment area of Section E.
First, include a copy of the results of any engineering review and analysis that is performed to determine the potential impacts of the floodplain for any project that changes a waterway, water flow, or a drainage way (e.g. adding a culvert or increasing the size of an existing culvert). This analysis is called a Hydrology and Hydraulics study (H&H). An H&H study models the flow of water during different rainfall events and predicts how a watershed and stream will react during those events. If your project involves changing the drainage volume or patterns of a waterway, an H&H analysis is required to determine if flood elevations or velocities are effected upstream and downstream of your project. It will also give you an idea of the true benefits of the project.
Second, include documentation of your contact with relevant regulatory agencies, including:
Last Modified: Wednesday, 11-Aug-2010 14:16:52 EDT
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