[R.O. 2012 § 415.150]
A. 
No permit for floodplain development shall be granted for new construction, substantial improvements and other improvements, including the placement of manufactured homes, within any numbered or unnumbered A Zones and AE Zones, unless the conditions of this Section are satisfied.
B. 
All areas identified as unnumbered A Zones on the FIRM are subject to inundation of the 100-year flood; however, the base flood elevation is not provided. Development within unnumbered A Zones is subject to all provisions of this Chapter. If Flood Insurance Study data is not available, the community shall obtain, review and reasonably utilize any base flood elevation or floodway data currently available from Federal, State or other sources.
C. 
Until a floodway is designated, no new construction, substantial improvements or other development, including fill, shall be permitted within any numbered A Zone or AE Zone on the FIRM, unless it is demonstrated 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.
D. 
In all areas of special flood hazards (Zones A, AE, A1-30), the following provisions are required in all new construction, subdivision proposals, substantial improvements, prefabricated structures, placement of manufactured homes and other development:
1. 
All new construction, including manufactured homes and 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. 
Shall be constructed with materials resistant to flood damage.
3. 
Shall be constructed by methods and practices that minimize flood damage.
4. 
Shall be constructed with electrical, heating, ventilation, plumbing 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 systems and discharges from the system into floodwaters.
7. 
On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
8. 
Storage, Material And Equipment. The storage or processing of materials within the special flood hazard area that are in time of flooding buoyant, flammable, explosive or could be injurious to human, animal or plant life is prohibited.
9. 
Storage of other material or equipment may be allowed if not subject to major damage by floods, if firmly anchored to prevent flotation, or if readily removable from the area within the time available after a flood warning.
10. 
Until a floodway has been designated, no development, including landfill, may be permitted within Zones A1-30 and AE on the City's FIRM unless the applicant for the land use has demonstrated that the proposed use, when combined with all other existing and reasonably anticipated uses, will not increase the water surface elevations of the 100-year flood more than one (1) foot on the average cross section of the reach in which the development or landfill is located as shown on the Flood Insurance Rate Study incorporated by reference, Article III, Section 415.040 of this Chapter.
[R.O. 2012 § 415.160]
A. 
Subdivision proposals and other proposed new development, including manufactured home parks or subdivisions, located within special flood hazard areas are required to assure that:
1. 
All such proposals shall be consistent with the need to minimize flood damage.
2. 
All public utilities and facilities such as sewer, gas, electrical and water systems are located and constructed to minimize or eliminate flood damage.
3. 
Adequate drainage provided to reduce exposure to flood hazards.
4. 
All proposals for development (including proposals for manufactured home parks and subdivisions) of five (5) acres or fifty (50) lots, whichever is lesser, include within such proposals base flood elevation data.
[R.O. 2012 § 415.170; Ord. No. 1177 §§ 1 — 3, 7-9-2007]
A. 
In all areas of special flood hazards where base flood elevation data has been provided as set forth in Article III, Section 415.040, the following provisions are required:
1. 
Residential Construction. New construction or substantial improvement of any residential structure, including manufactured homes shall have the lowest floor, including basement, elevated equal to the base flood elevation.
2. 
Non-Residential Construction. New construction or substantial improvement of any commercial, industrial or other non-residential structure, including manufactured homes shall either have the lowest floor, including basement, elevated equal to the base flood elevation or, together with attendant utility and sanitary facilities, be floodproofed so that below such a 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. A registered professional engineer or architect shall certify that the standards of this Subsection are satisfied. Such certification shall be provided to the official as set forth in Article IV, Section 415.130.
3. 
Requirements For All New Construction And Substantial Improvements. 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 which 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 registered professional engineer or architect or meet or exceed the following minimum criteria:
a. 
A minimum of two (2) openings having a total net area of not less than one (1) square inch for every square foot of enclosed area subject to flooding shall be provided; and
b. 
The bottom of all openings shall be no higher than one (1) foot above grade. Openings may be equipped with screens, louvers, valves or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.
4. 
In all areas of special flood hazard, once floodway data is obtained, as set forth in Section 415.040, the following provisions are required:
a. 
The designated floodway shall be based on the standard that the area chosen for the floodway must be designed to carry the waters of the base flood without increasing the water surface elevation more than one (1) foot at any point; and
b. 
The community shall prohibit any encroachments, including fill, new construction, substantial improvements and other development, within the designated 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 community during the occurrence of the base flood discharge.
5. 
Manufactured Homes.
a. 
All manufactured homes to be placed within all unnumbered and numbered A Zones and AE Zones on the community's FIRM shall be required to be installed using methods and practices that minimize flood damage. For the purposes of this requirement, manufactured homes must be elevated and anchored to resist flotation, collapse or lateral movement. Methods of anchoring may include, but are not limited to, use of over-the-top or frame ties to ground anchors. Manufactured homes must be anchored in accordance with State and local Building Codes and FEMA guidelines. In the event that over-the-top frame ties to ground anchors are used, the following specific requirements (or their equivalent) shall be met:
(1) 
Over-the-top ties be provided at each of the four (4) corners of the manufactured home with two (2) additional ties per side at intermediate locations and manufactured homes less than fifty (50) feet long requiring one (1) additional tie per side;
(2) 
Frame ties be provided at each corner of the home with five (5) additional ties per side at intermediate points and manufactured homes less than fifty (50) feet long requiring four (4) additional ties per side;
(3) 
All components of the anchoring system be capable of carrying a force of four thousand eight hundred (4,800) pounds; and
(4) 
Any additions to the manufactured home be similarly anchored.
b. 
Require manufactured homes that are placed or substantially improved within unnumbered A Zones and AE Zones on the community's FIRM on sites:
(1) 
Outside of manufactured home park or subdivision;
(2) 
In a new manufactured home park or subdivision;
(3) 
In an expansion to an existing manufactured home park or subdivision; or
(4) 
In an existing manufactured home park or subdivision on which a manufactured home has incurred "substantial damage" as the result of a flood be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to one (1) foot above the base flood level and be securely attached to an adequately anchored foundation system to resist flotation, collapse and lateral movement.
c. 
Require that manufactured homes to be placed or substantially improved on sites in an existing manufactured home park or subdivision within unnumbered A Zones and AE Zones on the community's FIRM, that are not subject to the provisions of Subsection (A)(5)(b) of this Section, be elevated so that either:
(1) 
The lowest floor of the manufactured home is equal to the base flood level; or
(2) 
The manufactured home chassis is supported by reinforced piers or other foundation elements of at least equivalent strength that are no less than thirty-six (36) inches in height above grade and be securely attached to an adequately anchored foundation system to resist flotation, collapse and lateral movement.
6. 
Recreational Vehicles. Recreational vehicles placed on sites within special flood hazard areas on the community's FIRM shall either:
a. 
Be on the site for fewer than one hundred eighty (180) consecutive days and be fully licensed and ready for highway use (NOTE: 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.); or
b. 
Meet the permitting, elevating and the anchoring requirements for manufactured homes of this Chapter.
[R.O. 2012 § 415.180; Ord. No. 1177 §§ 4 — 5, 7-9-2007]
A. 
Located within the areas of special flood hazard established in Article III, Section 415.040 are areas designated as shallow flooding. These areas have special flood hazards associated with base flood depths of one (1) to three (3) feet where a clearly defined channel does not exist and where the path of flooding is unpredictable and indeterminate; therefore, the following provisions apply:
1. 
Within AO Zones.
a. 
All new construction and substantial improvements of residential structures 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 one (1) foot if no depth number is specified].
b. 
All new construction and substantial improvements of non-residential structures shall:
(1) 
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 one (1) foot if no depth number is specified], or
(2) 
Together with attendant utility and sanitary facilities be completely floodproofed to or above that level so that any space below that level 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.
c. 
Adequate drainage paths around structures on slopes shall be required in order to guide floodwaters around and away from proposed structures.
d. 
The anchoring requirements for manufactured homes as established in Section 415.170(A)(5)(a) shall be required.
2. 
Within AH Zones.
a. 
The specific standards for all areas of special flood hazard where base flood elevation data has been provided shall be required as set forth in Section 415.170.
b. 
Adequate drainage paths around structures on slopes shall be required in order to guide floodwaters around and away from proposed structures.