In all areas of special flood hazard the following provisions are required for all new construction and substantial improvements:
(1) 
All new construction or substantial improvements shall be designed (or modified) and adequately anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.
(2) 
All new construction or substantial improvements shall be constructed by methods and practices that minimize flood damage.
(3) 
All new construction or substantial improvements shall be constructed with materials resistant to flood damage.
(4) 
All new construction or substantial improvements shall be constructed with electrical, heating, ventilation, plumbing, and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
(5) 
All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of floodwaters into the system.
(6) 
New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the system and discharge from the systems into floodwaters.
(7) 
Onsite waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
(8) 
All proposed developments shall be designed and constructed to not increase the flooding potential for existing structures that are known to be impacted by the base flood.
(Ordinance 1856, § I, 8-25-09; Ordinance 2209, § 1, 11-27-18)
In all areas of special flood hazard where base flood elevation data have been provided as set forth in section 38-5, section 38-42 or section 38-73(4), the following provisions are required:
(1) 
Residential and nonresidential construction.
New construction and substantial improvement of any structure shall have the lowest floor, including basement and garage, elevated two feet or more above the base flood elevation. A licensed professional engineer, or land surveyor shall submit a certification letter to the planning and development department that the standard of this subsection, as proposed in section 38-45(a)(1), is satisfied.
(2) 
Enclosures.
New construction and substantial improvements, with fully enclosed areas below the lowest floor that are usable solely for parking of vehicles, building access or storage in an area other than a basement and that are subject to flooding, shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a licensed professional engineer or meet or exceed the following minimum criteria:
a. 
A minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provided.
b. 
The bottom of all openings shall be no higher than one foot above grade.
c. 
Openings may be equipped with screens, louvers, valves or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters.
(3) 
Manufactured homes.
The placement of manufactured housing within the areas which have been identified as areas of special flood hazard is prohibited.
(4) 
Recreational vehicles.
The placement of recreational vehicles within zones A1-30, AH, and AE on the community’s FIRM either must:
a. 
Be on the site for fewer than 180 consecutive days; or
b. 
Be fully licensed and ready for highway use. A recreational vehicle is ready for highway use if it is on its wheels or jacking system, is attached to the site only by quick disconnect type utilities and security devices, and has no permanently attached additions.
(Ordinance 1856, § I, 8-25-09; Ordinance 2209, § 1, 11-27-18)
The following standards shall apply for subdivision proposals:
(1) 
All subdivision proposals, including manufactured home parks and subdivisions, shall be consistent with sections 38-2 and 38-3.
(2) 
All proposals for the development of subdivisions, including manufactured home parks and subdivisions, shall meet the development permit requirement of section 38-44, section 38-45, and the provisions of this article.
(3) 
Base flood elevation data shall be generated for subdivision proposals and other proposed development, including manufactured home parks and subdivisions, if not otherwise provided pursuant to section 38-5 or section 38-42(8) of this chapter.
(4) 
All subdivision proposals, including manufactured home parks and subdivisions, shall have adequate drainage provided to reduce exposure to flood hazards.
(5) 
All subdivision proposals, including manufactured home parks and subdivisions, shall have public utilities facilities, such as sewer, gas, electrical and water systems, located and constructed to minimize or eliminate flood damage.
(Ordinance 1856, § I, 8-25-09; Ordinance 2209, § 1, 11-27-18)
Located within the areas of special flood hazard established in section 38-5 are areas designated as shallow flooding. These areas have special flood hazards associated with base flood depths of one to three feet, where a clearly defined channel does not exist and where the path of flooding is unpredictable, and where velocity flow may be evident. Such flooding is characterized by ponding or sheet flow; therefore, the following provisions apply:
(1) 
All new construction and substantial improvements of residential structures shall have the lowest floor, including basement, elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community’s FIRM (at least two feet if no depth number is specified).
(2) 
All new construction and substantial improvements of nonresidential structures:
a. 
Shall have the lowest floor, including basement, elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community’s FIRM (at least two feet if no depth number is specified); or
b. 
Together with attendant utility and sanitary facilities, shall be designed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy.
(3) 
A licensed professional engineer shall submit a certification to the floodplain administrator that the standards of this section, as proposed in section 38-45(a)(1), are satisfied.
(4) 
Require within zones AH or AO adequate drainage paths around structures on slopes to guide floodwaters around and away from proposed structures.
(Ordinance 1856, § I, 8-25-09; Ordinance 2209, § 1, 11-27-18)
Located within areas of special flood hazard established in section 38-5 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 shall apply:
(1) 
Encroachments are prohibited, including fill, new construction, substantial improvements and other development, unless certification by a licensed professional engineer is provided demonstrating that encroachments shall not result in any increase in flood levels within the community during the occurrence of the base flood discharge.
(2) 
If subsection (1) of this section is satisfied, all construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of this article.
(Ordinance 1856, § I, 8-25-09; Ordinance 2209, § 1, 11-27-18)