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21 <br />Along rivers and streams where BFE data area is provided, but neither floodwav not non- <br />encroachment areas are identified for a SFHA on the FIRM or in the FIS, no <br />encroachments including_ fill new construction, substantial improvements, or other <br />development shall be ,permitted unless certification with supporting technical data by a <br />North Carolina licensed Professional Engineer is provided demonstrating that the <br />cumulative effect of the proposed development when combined with all other existing and <br />anticipated development, will not increase the water surface elevation of the base flood by <br />more than one foot at anypoint within Orange County. <br />Sec. 6.32.6. Floodway and non-encroachment areas. <br />Areas designated as floodwavs or non-encroachment areas are located within the SFHA <br />established in Section 4 2 39 The floodwavs and non-encroachment areas are extremely <br />hazardous areas due to the velocity of floodwaters that have erosion potential and carry <br />debris and potential projectiles The following_provisions shall apply to all development <br />within such areas: <br />1 No encroachments including fill new construction, substantial improvements and <br />other developments shall be permitted unless it has been demonstrated through <br />hydrologic and hydraulic analyses performed according to standard engineering <br />practice that the proposed encroachment would not result in any increase in the flood <br />levels during the occurrence of the base flood. Such certification and technical data <br />shall be presented to the Floodplain Administrator before issuance of floodplain <br />development permit. <br />2 If the requirements of Section 6.32.2b(1) are adhered to, all development shall <br />comply with all applicable flood hazard reduction provisions of this Ordinance. No <br />manufactured homes shall be permitted, <br />Sec.6.32.7. Standards for Floodplains without Established Base Flood Elevations. <br />Within the SFHAs established in Section 4.2.38, where no BFE data has been provided, <br />the following_provisions shall apply: . <br />1 No encroachments including fill new construction, substantial improvements or new <br />development shall be~ermitted within a distance of twenty feet each side from ton of <br />bank or five times the width of the stream whichever is greater, unless certification <br />with supporting technical data by a North Carolina licensed Professional Engineer is <br />provided demonstrating that such encroachments shall not result in any increase in <br />flood levels during the occurrence of the base flood discharge. <br />2 If the requirements of Section 6.32.2(1) are adhered to and BFE data are available <br />from other sources all new construction and substantial improvements within such <br />areas shall also comply with all ap,.plicable provisions of this Ordinance and shall be <br />elevated or flood proofed according to elevations established according to Section <br />21 11(11/12) When BFE data are not available from a federal, state, or other source, <br />the reference level including basement, shall be elevated at least two (21 feet above <br />the HAG. <br />