Floodplain Management in Illinois - Illinois Department of Natural ...

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Enclosures Below the BFE NOTE: TOTAL OPENING AREA IS 1 SQ. IN. PER SQ. FT. A 25' X 45' BUILDING NEEDS 1125 SQ. INCHES OF OPENINGS LOWEST FLOOR BFE INTERIOR GROUND LEVEL AT OR ABOVE OUTSIDE GRADE CRAWLSPACE BUILDING AT LEAST TWO FLOOD OPENINGS ON DIFFERENT SIDES NO MORE THAN 1' ABOVE GROUND Solid perimeter wall foundations can enclose flood-prone space. A crawlspace is a good way to elevate just a couple of feet. In all cases, the following are required: openings/vents, elevated utilities, flood resistant materials, and limitations on use. 26 ILLINOIS QUICK GUIDE
Utility Service for Buildings ATTACHED GARAGE BFE ELECTRICAL BOX WIRED FROM CEILING BFE OPENING FOR FLOOD WATER FLOOD OPENING HOT WATER HEATER ELEVATED ON A PLATFORM All utilities, appliances, and equipment must be elevated above the BFE or protected. Utilities include plumbing, electrical, gas lines, heating, and air conditioning. 27 ILLINOIS QUICK GUIDE
Page 1 and 2: FLOODPLAIN MANAGEMENT IN ILLINOIS 2
Page 3 and 4: About This Guide The Floodplain Man
Page 5 and 6: Community Responsibilities To parti
Page 7 and 8: Understanding the Floodway A Flood
Page 9 and 10: The Flood Insurance Rate Map NOTE:
Page 11 and 12: Approximate Flood Zones Approximate
Page 13 and 14: Floodplain Development Includes: Co
Page 15 and 16: What is the Elevation Certificate a
Page 17 and 18: Is Your Land Higher than the BFE Se
Page 19 and 20: Nature Doesn’t Read Maps Importan
Page 21 and 22: Some Key Permit Review Steps The Pe
Page 23 and 24: Floodway Development Proposals For
Page 25 and 26: How to Elevate Your Floodplain Buil
Page 27: Manufactured Homes Deserve Special
Page 31 and 32: Recreational Vehicles In a flood ha
Page 33 and 34: Planning to Improve Your Floodplain
Page 35 and 36: Elevating a Pre-FIRM Building AFTER
Page 37 and 38: Paperwork is Important - for You an
Page 39 and 40: Some Mitigation Projects are More C

Floodplain Management in Illinois - Illinois Department of Natural ...

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