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§ 30-4-33 — FLOODPLAIN MAPS, DELINEATION, AND DEPICTION

Austin City Code (Supp. No. 174: codified through Ordinance No. 20260521-050, effective June 1, 2026) · Austin City Code § 30-4-33

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§ 30-4-33 - FLOODPLAIN MAPS, DELINEATION, AND DEPICTION.

(A) The director shall designate and maintain official floodplain maps. (B) If an official floodplain map is not delineated, the owner of property to be developed shall calculate the boundaries of the 100-year floodplain in accordance with the Drainage Criteria Manual and submit the calculation to the single office for approval. (C) If the single office determines that FEMA regulations require a submission to the agency of a request for a flood insurance rate map revision, the single office may require that the revision request to FEMA be submitted by the owner of property to be developed. (D) A person who files a development application shall depict, as applicable: (1) on a preliminary plan or subdivision construction plan: (a) a 100-year floodplain; (b) a FEMA floodplain; and (c) a drainage easement or proposed drainage easement; (2) on a final plat: (a) a drainage easement; and (b) a portion of a FEMA floodplain that is outside a drainage easement. (E) If a portion of a FEMA floodplain is outside a drainage easement, the owner of property to be developed shall, on a final plat: (1) identify the portion of the FEMA floodplain that is outside the drainage easement, including the community and panel number of the flood insurance rate map; and (2) include a note that: (a) refers the reader to federal and local regulations governing development in a FEMA floodplain; (b) states that flood insurance may be required; and (c) describes efforts to revise the flood insurance rate map.

Source: Ord. 20131017-046.