To meet NFIP minimum requirements to have flood data reviewed and approved by FEMA, and to ensure that the county’s flood maps, studies and other data identified in § 152.006 of this chapter accurately represent flooding conditions so appropriate floodplain management criteria are based on current data, the following map maintenance activities are identified.
(A) Requirement to submit new technical data.
(1) (a) For all development proposals that impact floodway delineations or base flood elevations, the community shall ensure that technical data reflecting such changes be submitted to FEMA within six months of the date such information becomes available.
(b) These development proposals include:
1. Floodway encroachments that increase or decrease base flood elevations or alter floodway boundaries;
2. Fill sites to be used for the placement of proposed structures where the applicant desires to remove the site from the special flood hazard area; and
3. Alterations of watercourses that result in a relocation or elimination of the special flood hazard area, including the placement of culverts, and subdivision or large-scale development proposals requiring the establishment of base flood elevations.
(2) It is the responsibility of the applicant to have required technical data for a conditional letter of map revision or letter of map revision and submit to FEMA. The State Department of Natural Resources will review the submittals as part of a partnership with FEMA. The submittal should be mailed to the State Department of Natural Resources at the address provided on the FEMA form (MT-2) or submitted through the online letter of map change website. Submittal and processing fees for these map revisions shall be the responsibility of the applicant.
(3) The Floodplain Administrator shall require a conditional letter of map revision prior to the issuance of a floodplain development permit for proposed floodway encroachments that increase the base flood elevation.
(4) Floodplain development permits issued by the Floodplain Administrator shall be conditioned upon the applicant obtaining a letter of map revision from FEMA for any development proposal subject to this section.
(B) Right to submit new technical data. The Floodplain Administrator may request changes to any of the information shown on an effective map that does not impact floodplain or floodway delineations or base flood elevations, such as labeling or planimetric details. Such a submission shall include appropriate supporting documentation made in writing by the Town Council President and may be submitted to FEMA at any time.
(C) Annexation/detachment. Upon occurrence, the Floodplain Administrator shall notify FEMA in writing whenever the boundaries of the town have been modified by annexation or the community has assumed authority over an area, or no longer has authority to adopt and enforce floodplain management regulations for a particular area. In order that the “Vanderburgh County, Indiana, and Incorporated Areas Flood Insurance Rate Map” accurately represents the town boundaries, include within such notification a copy of a map of the town, suitable for reproduction, clearly showing the new corporate limits or the new area for which the town has assumed or relinquished floodplain management regulatory authority.
(Ord. 2022-1, passed 3-8-2022)