15.04.130 Development proposals in the special flood hazard area.
Subdivision proposals or other proposed new developments in the special flood hazard area, including manufactured home parks or subdivisions, shall be reviewed to determine whether such proposals will be reasonably safe from flooding. If only a portion of the proposed development is within the special flood hazard area, only that portion needs to comply with the standards of this section.
A. All private and public suppliers of public utilities and facilities such as sewer, gas, electrical and water systems shall:
1. Design, locate and construct utilities and facilities in such a way as to minimize or eliminate flood damage;
2. Design new and replacement water supply systems to minimize or eliminate infiltration of flood waters into the systems;
3. Design new and replacement sanitary sewage systems to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters;
4. All designs and specifications for public utilities located in the flood hazard area must be certified as to their compliance with this section by a registered engineer.
B. Adequate drainage must be provided to reduce exposure to flood hazards. A drainage plan that will result in minimizing exposure to floodwaters for the subdivision or development shall be submitted by the subdivider(s) with the preliminary and final plats required by FNSBC Title 17. The plan shall show:
1. The expected drainage route that will carry floodwaters away from each lot or parcel (via natural contours, natural drainage, ditches, or culverts).
2. The impact on drainage caused by road construction.
3. The location of culverts, ditches, retention ponds, bridges or other factors minimizing the impact on drainage caused by road construction.
C. Each new subdivision proposal and each proposed new development greater than 50 lots or five acres, including replats and planned unit developments, shall include with such proposal the base flood elevation for each lot with such elevation being noted prominently on the preliminary and final plats.
D. All subdivisions which are located, in part or in total, in the flood hazard area shall have a note placed on the preliminary and final plats stating:
This property has been determined, in whole or in part, to be located within a flood hazard area as identified by the Federal Emergency Management Agency. All development shall be required to comply with federal regulations and FNSBC Title 15.
E. Storage of Materials and Equipment. A permit is required for the storage of materials and equipment in the special flood hazard area and includes any alteration, such as the use of fill, that affects drainage patterns or the flood-carrying capacity of a watercourse.
1. Within a special flood hazard area, all persons shall store, except for incidental use, those materials which have a low ignition point, burn intensely, explode violently, spread widely or otherwise are likely to cause injury, death and property damage including, but not limited to, those substances identified in 40 CFR 116 (which designates hazardous materials under Section 311(b)(2)(A) of the Federal Water Pollution Control Act), according to the following:
a. All storage structures and containers shall be either:
i. Elevated to one foot above the base flood elevation; or
ii. Adequately floodproofed to prevent flotation or leakage due to aging or damage.
b. All pipelines necessary for the storage and transfer of hazardous materials shall have anti-backflow valves to prevent contamination during flooding.
2. Storage of other materials or equipment may be allowed below the base flood elevation if readily removable from the area within the time available after a flood warning or if firmly anchored, restrained or enclosed to prevent damage during a flood event. Any storage activity shall meet the no-rise floodway and cumulative encroachment standards set forth in FNSBC 15.04.150. (Ord. 2009-55 § 2, 2010; Ord. 86-019 § 3, 1986; Ord. 85-124 § 3, 1985. 2004 Code § 15.04.090.)