Any activity performed in the floodplain must have a floodplain development permit. This includes grading, filling, residential construction and commercial construction. To obtain a permit you must complete an application. Applications can be picked up at the Department of Building and Safety, or online at Floodplain Development. Complete and return the form to the Department of Building and Safety along with 3 sets of plans for the project. The plans must clearly show existing and proposed contours at the site with all elevations submitted in NAVD 1988 datum. You must also submit approvals of all other required permits such as the NOI or 404 permit with the floodplain permit.