A. Standards Of Construction: In all areas of special flood hazards the following standards are required:
1. Anchoring:
a. All new construction and substantial improvements shall be anchored to prevent flotation collapse or lateral movement of the structure.
b. All mobile homes shall meet the anchoring standards of subsection E1 of this section.
2. Construction Materials And Methods:
a. All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage.
b. All new construction and substantial improvements shall be constructed using methods and practices that minimize flood damage.
3. Elevation And Floodproofing:
a. New construction and substantial improvement of any structure shall have the lowest habitable floor, including basements, elevated to or above the base flood elevation. Nonresidential structures may meet the standards in subsection A3c of this section. Upon the completion of the structure the elevation of the lowest habitable floor including basements shall be certified by a registered professional engineer or surveyor and provided to the floodplain administrator.
b. New construction and substantial improvement of any structure in zone AO shall have the lowest floor, including basements, elevated to or above the depth number specified on the FIRM. If there is no depth number on the FIRM, the lowest floor, including basements, shall be elevated one foot (1') above the crown of the nearest street. Nonresidential structures may meet the standards in subsection A3c of this section. Upon completion of the structure a registered professional engineer shall certify to the floodplain administrator that the elevation of the structure meets this standard.
c. Nonresidential construction shall either be elevated in conformance with subsection section A3a or A3b of this section or together with attendant utility and sanitary facilities:
(1) Be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;
(2) Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and
(3) Be certified by a registered professional engineer or architect that the standards of this subsection are satisfied. Such certifications shall be provided to the floodplain administrator.
d. Mobile homes shall meet the above standards and also the standards in subsection E of this section.
B. Standards For Storage Of Materials And Equipment:
1. The storage or processing of materials that are in time of flooding buoyant, flammable, explosive, or could be injurious to human, animal or plant life is prohibited.
2. Storage of other material or equipment may be allowed if not subject to major damage by floods and if firmly anchored to prevent flotation or if readily removable from the area within the time available after flood warning.
C. Standards For Utilities:
1. All new and replacement water supply and sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the system and discharge from systems into floodwaters.
2. On site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
D. Standards For Subdivisions:
1. All preliminary subdivision proposals shall identify the flood hazard area and the elevation of the base flood.
2. All final subdivision plans will provide the elevation of proposed structures and pads. If the site is filled above the base flood level, the final pad elevation shall be certified by a registered professional engineer or surveyor and provided to the floodplain administrator.
3. All subdivision proposals shall be consistent with the need to minimize flood damage. All subdivision proposals shall have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize flood damage.
E. Standards For Mobile Homes And Mobile Home Parks And Subdivisions:
1. Mobile Homes: All mobile homes and additions to mobile homes shall be anchored to resist flotation, collapse, or lateral movement by one of the following methods:
a. Over the top ties are provided at each of the four (4) corners of the mobile home, with two (2) additional ties per side at intermediate locations, except that mobile homes less than fifty feet (50') long require only one additional tie per side;
b. Frame ties are provided at each corner of the home with five (5) additional ties per side at intermediate points, except that mobile homes less than fifty feet (50') long require only four (4) additional ties per side; and
c. All components of the anchoring system are capable of carrying a force of four thousand eight hundred (4,800) pounds.
2. Mobile Home Parks And Mobile Home Subdivisions: The following standards are required for: a) mobile homes not placed in mobile home parks or subdivisions, b) new mobile home parks or subdivisions, c) expansions to existing mobile home parks or subdivisions, and d) repair, reconstruction, or improvements to existing mobile home parks or subdivisions that equals or exceeds fifty percent (50%) of the value of the streets, utilities and pads before the repair, reconstruction or improvement commenced.
a. Adequate surface drainage and access for a hauler shall be provided.
b. All mobile homes shall be placed on pads or lots elevated on compacted fill or on pilings so that the lowest floor of the mobile home is at or above the base flood level. If elevated on pilings:
(1) The lots shall be large enough to permit steps;
(2) The piling shall be placed in stable soil no more than ten feet (10') apart; and
(3) Reinforcement shall be provided for pilings more than six feet (6') above the ground level.
F. Mobile Home Placement: No mobile home shall be placed in a floodway, except in an existing mobile home park or existing mobile home subdivision.
G. Floodways: Located within areas of a special flood hazard established in subsection 3-3-3B of this chapter are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of floodwaters which carry debris, potential projectiles, and erosion potential, the following provisions apply:
1. Encroachments, including fill, new construction, substantial improvements, and other development are prohibited unless certification by a registered professional engineer or architect is provided demonstrating that encroachments shall not result in any increase in flood levels during the occurrence of the base flood discharge.
2. The placement of any mobile homes except in an existing mobile home park or subdivision is prohibited.
3. If subsections G1 and G2 of this section are satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of this section.
4. If no floodway is identified, then a setback of twenty feet (20') from the band(s) of the watercourse will be established, where encroachment will be prohibited. (Ord. 1-1983, 2-16-1983)