I am completing an elevation certificate that falls within Zone A4. On the FIRM map this zone has base flood elevations by cross sections at 2' intervals. The house falls somewhere between 1044' and 1046'. I was wondering if anyone has an opinion on how to determine the base flood elevation to document. Best judgement would say that if the house is right in the middle of the 1044 and 1046 it would be 1045'. Its a narrow enough area between it would be difficult to scale anything more precise, but whether this would be the appropriate method is the question.
Do you have a flood profile in the Flood Insurance Study (FIS) that you can use to scale between the cross sections?
I love to hear about these riverine floodplain conundrums. Could you post an image? Can you place the building on the FIRM? Do you have the building elevations?
https://www.fema.gov/pdf/floodplain/nfip_sg_unit_4.pdf&apos ;">UNIT 4: USING NFIP STUDIES AND MAPS
Section B explains how to determine the BFE using the Map if there is not a profile in the Flood Insurance Study (FIS)
Section C explains how to determine the BFE using the Profile by stationing between lettered sections.
DDSM:beer:
BIDDLECW, post: 333146, member: 9943 wrote: I am completing an elevation certificate that falls within Zone A4. On the FIRM map this zone has base flood elevations by cross sections at 2' intervals. The house falls somewhere between 1044' and 1046'. I was wondering if anyone has an opinion on how to determine the base flood elevation to document. Best judgement would say that if the house is right in the middle of the 1044 and 1046 it would be 1045'. Its a narrow enough area between it would be difficult to scale anything more precise, but whether this would be the appropriate method is the question.
Your local floodplain official is the one who establishes the BFE.