ii. Data by Other Sources . If Base Flood Elevations (BFE) and floodway/non- encroachment area data are available from other sources, all new construction and substantial improvements within such areas shall also comply with all applicable provisions of the Flood Damage Prevention Regulations and shall be elevated or flood proofed in accordance with standards in §9-1401 Flood Damage Prevention Regulations, k. Provisions for Flood Hazard Reduction, (2) Specific Standards and §9-1401 Flood Damage Prevention Regulations, k. Provisions for Flood Hazard Reduction, (5) of the Flood Damage Prevention Regulations. (4) Standards for Riverine Floodplains with Base Flood Elevation (BFE) but without Established Floodways or Non-Encroachment . Along rivers and streams where Base Flood Elevation (BFE) data is provided but neither floodway nor non-encroachment areas are identified for a Special Flood Hazard Area on the Flood Insurance Rate Maps (FIRM) or in the Flood Insurance Study (FIS) report, the following requirements shall apply to all development within such areas: A. Provisions for Flood Hazard Reduction . Standards outlined in to §9-1401 Flood Damage Prevention Regulations, k. Provisions for Flood Hazard Reduction, (1) General Standards and (2) Specific Standards. B. No Encroachments without Engineer’s Certification . Until a regulatory floodway or non-encroachment area is designated, no encroachment, fill, new construction, substantial improvements, or other development, shall be permitted unless certification with supporting technical data by a registered professional engineer is provided demonstrating that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the base flood more than one (1) foot at any point within the community. (5) Floodways & Non-Encroachment Areas . Areas designated as floodways or non- encroachment areas are located within the Special Flood Hazard Areas established in §9- 1401 Flood Damage Prevention Regulations, f. General Provisions (2). The floodways and non-encroachment areas are extremely hazardous areas due to the velocity of floodwaters that have erosion potential and carry debris and potential projectiles. The following provisions, in addition to standards outlined in §9-1401 Flood Damage Prevention Regulations, k. Provisions for Flood Hazard Reduction, (1) General Standards and (2) Specific Standards, shall apply to all development within such areas:
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