§ 2.5. Use and interpretation of FIRMs.

The floodplain administrator shall make interpretations, where needed, as to the exact location of SFHAs, floodplain boundaries, and floodway boundaries. The following shall apply to the use and interpretation of FIRMs and data:

A.

Where field surveyed topography indicates that adjacent ground elevations:

1.

Are below the base flood elevation, even in areas not delineated as a SFHA on a FIRM, the area shall be considered a SFHA and subject to the requirements of this ordinance;

2.

Are above the base flood elevation, the area shall be regulated as a SFHA unless the applicant obtains a letter of map change that removes the area from the SFHA.

B.

In FEMA-identified SFHAs where base flood elevation and floodway data have not been identified and in areas where FEMA has not identified SFHAs, any other flood hazard data available from a federal, state, local or other source shall be reviewed and reasonably used.

C.

Base flood elevations and designated floodway boundaries on FIRMs and in Flood Insurance Studies (FISs) shall take precedence over base flood elevations and floodway boundaries by any other sources if such sources show reduced floodway widths or lower base flood elevations.

D.

Other sources of data shall be reasonably used if such sources show increased base flood elevations or larger floodway areas than are shown on FIRMs and in FISs.

E.

If a preliminary FIRM and/or a preliminary FIS has been provided by FEMA:

1.

Upon the issuance of a letter of final determination by FEMA, the preliminary flood hazard data shall be used and shall replace the flood hazard data previously provided from FEMA for the purposes of administering this ordinance.

2.

Prior to the issuance of a letter of final determination by FEMA, the use of preliminary flood hazard data shall be deemed the best available data pursuant to section 4.6 and used where no base flood elevations or floodway areas are provided on the effective FIRM.

3.

Prior to issuance of a letter of final determination by FEMA, the use of preliminary flood hazard data is permitted where the preliminary base flood elevations or floodway areas exceed the base flood elevations or designated floodway widths in existing flood hazard data provided by FEMA. Such preliminary data may be subject to change or appeal to FEMA.

(Ord. No. 3309, 11-26-13)

(Ord. No. 3309, 11-26-13)