DETERMINATION OF THE 25-YEAR FLOODPLAIN.
Austin City Code § 25-7-7
in effect§ 25-7-7 - DETERMINATION OF THE 25-YEAR FLOODPLAIN.
For purposes of this chapter, the 25-year floodplain shall be:
(A) For areas amended to incorporate Atlas 14 data, the 25-year floodplain calculated under fully developed conditions as prescribed by the Drainage Criteria Manual as amended to incorporate Atlas 14 data;
(B) For areas not yet amended to consider Atlas 14 data, the 100-year floodplain calculated under fully developed conditions as prescribed by the Drainage Criteria Manual using data predating Atlas 14; or
(C) For the Colorado River, the 25-year floodplain as calculated under exiting conditions as prescribed by the Drainage Criteria Manual using data predating Atlas 14.
Source: Ord. No. 20191114-064, Pt. 6, 11-25-19.
Source: City of Austin, City Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/tx/austin/codes/code_of_ordinances?nodeId=TIT25LADE_CH25-7DR_ART1GEPR_S25-7-7DE25-YEARFLFetched: 10/27/2026
