1. (a)

   1. (1) Encroachment, including fill, new construction, substantial improvements, and other development are prohibited within the adopted regulatory floodway unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in flood levels within the floodway during the occurrence of the base flood discharge.
   2. (2) Engineering analyses shall be prepared by a registered professional engineer.
2. (b) Except in unnumbered Zone “A”, until a regulatory floodway is designated, no new construction, substantial improvements, or other development (including fill) shall be permitted.

3. (c) Notwithstanding any other provisions, encroachment may be permitted within the adopted regulatory floodway that would result in an increase in base flood elevations, provided that the requesting agency:

   1. (1) First applies to the Federal Emergency Management Agency for a conditional FIRM and floodway revision;
   2. (2) Fulfills the requirements for such revisions as established under the provisions of National Flood Insurance Program Regulations, 44 C.F.R. § 65.12; and
   3. (3) Receives the approval of the Flood Insurance Administrator.

4. (d)

   1. (1) Construction of new structures or substantial improvements to existing structures are prohibited within the floodplain unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed construction would result in an increase in flood levels of less than one foot (1’) within the floodplain during the occurrence of the base flood discharge.
   2. (2) Engineering analyses shall be prepared by a registered professional engineer.
5. (e) Adequate drainage paths around structures on slopes are required within the floodplain to guide floodwaters around and away from proposed structures.
6. (f) New structures or modifications and equipment installed within a floodplain shall be installed using methods and practices that minimize the potential for damage or loss due to flooding.

Codification Notes: "FIRM" means flood insurance rate maps.