Riverwoods Village Hall
300 Portwine Rd.
Riverwoods, IL 60015
Office Hours: M-F, 8:30am - 1:30pm
Phone: 847-945-3990
The following items must be submitted at the time of application for a permit for any type of development in a Regulatory Floodplain. Please note that the information requested below is required in addition to the information required for any Site Development Permit.
☐ Plat of Survey
☐ Site Location Map, drawn to scale on the Regulatory Floodplain map, indicating FEMA designated flood zone
☐ Topographic Survey, indicating ground contour elevations at one-foot intervals within fifty (50) feet of the limits of development, and the base flood elevation
☐ Site Plan, drawn at minimum scale of 1”=20’, indicating the limit of the floodplain and/or floodway
☐ Proposed Grading Plan, drawn at minimum scale of 1”=20’ indicating the following information, as applicable:
☐ Limits of regulatory floodplains and/or floodway clearly identified
☐ Existing and proposed buildings and/or structures
☐ Ground elevations at each outside building or structure corner
☐ Elevation of proposed lowest floor level for any building
☐ Existing and proposed asphalt, concrete and other impervious surfaces including brick pavers and artificial turf
☐ Areas of grading and fill clearly identified
☐ Limits and volume of proposed area of compensatory storage
☐ Methods of soil stabilization and erosion control
☐ Cross-section views of the project for the impacted reach showing existing and proposed conditions, dimensions and elevations, normal water elevation, 10-year frequency flood elevation, 100-year frequency flood elevation, and graphic or numerical scales.
☐ Calculation of proposed volume of fill within the floodplain
☐ Calculation of proposed volume of compensatory storage (minimum 1.20 x volume of fill)
☐ Preliminary Elevation Certificate of the proposed lowest floor elevation, including basements and attached garages for new buildings