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Resolution No 36-2021 - Adopting Revised Construction Standards and Specifications
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Resolution No 36-2021 - Adopting Revised Construction Standards and Specifications
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10/27/2021 9:20:49 AM
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Board of Public Works
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Resolutions
Document Date
10/26/2021
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SECTION 3 – STORMWATER <br />27 <br />3.) Minimum Flood Protection Grade applies to the lowest opening of a building that surface water <br />could enter a basement window, walkout basement doorway or structure’s finished floor, <br />whichever is lower. <br />4.) The plans shall list the proposed Base Flood Elevation on each lot. <br />3-1.7 FLOODPLAIN AND FLOODWAY <br />The Flood Control Act (IC 14-28-1) regulates various development activities (i.e. structures, <br />obstructions, deposits, and/or excavations) within the 100-year floodway of any waterway by <br />requiring IDNR approval prior to the beginning of the project. Permits issued under the Flood <br />Control Act are called Construction in a Floodway (CIF) permits. IDNR evaluates projects to <br />protect the floodway from undue restrictions and environmental impacts. A CIF permit could be <br />required for any waterway with an upstream drainage area equal to or greater than one (1.0) square <br />mile. <br />1.) It must be determined whether the development site is affected by the Flood Control Act by <br />evaluating if it is near a waterway with a watershed area in excess of one square mile. The <br />DHS FEMA flood plain maps do not include all flood plains regulated by the IDNR. The City <br />has developed a GIS layer to use as a guide in determining whether a waterway is regulated by <br />the IDNR due to contributing drainage areas. For sites that may be in a waterway regulated by <br />the IDNR, the engineer shall provide the appropriate survey information and calculations to <br />the DNR and obtain concurrence for the calculated the 100-year flood elevation. <br />2.) For sites along waterways with a contributing drainage area greater than one square mile, the <br />developer of such site shall provide the City with a copy of the CIF permit from the DNR <br />prior to final approval, or a letter from the DNR indicating that the site does not appear to <br />require such approval.
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