In all areas of special flood hazard the following general standards shall be required:
(A) 
All new construction and substantial improvements shall be:
(1) 
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) 
Constructed:
(a) 
By methods and practices that minimize flood damage;
(b) 
With materials resistant to flood damage; and
(c) 
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.
(B) 
All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system.
(C) 
New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the system and discharge from the systems into flood waters.
(D) 
On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
(E) 
In any area that has been removed from the floodplain via a Letter of Map Revision Based on Fill (LOMR-F), any existing or new structure, addition, or substantial improvement must meet the required elevation freeboard requirements.
(Ordinance 254-87-04-28, passed 4-28-87; Ordinance 1180-14-06-24, § 3, passed 6-24-14)
In all areas of special flood hazards where base flood elevation data has been provided as set forth in: §§ 151.04, 151.55(B)(8), and 151.37(B), the following standards shall be required:
(A) 
New construction of substantial improvements of any residential structure (or manufactured home) shall have the lowest floor, including basement, mechanical and utility equipment, and ductwork, elevated no lower than two (2) feet above the base flood elevation. A registered professional engineer, architect, or land surveyor shall submit an elevation certificate to the floodplain administrator that the standard of this subsection is met.
(B) 
New construction and substantial improvements of any commercial, industrial, or other nonresidential structure shall:
(1) 
Have the lowest floor, including the basement, elevated to no lower than two (2) feet above the base flood elevation; or
(2) 
Be floodproofed to a level no lower than two (2) feet above the level of the base flood elevation, provided that all areas of the building (including mechanical and utility equipment) below the required elevation are watertight.
A registered professional engineer or architect shall develop and/or review structural design, specifications, and plans for the construction, and shall certify that the designs and methods of construction are in accordance with accepted standards of practice as outlined in this subsection. A record of such certification which includes the specific elevation in relation to mean sea level to which such structures are floodproofed shall be maintained by the floodplain administrator.
(C) 
Require that all manufactured homes to be placed within zone A on a community’s FHBM or FIRM shall be installed using methods and practices which 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. This requirement is in addition to applicable State and local anchoring requirements for resisting wind forces.
(D) 
Require that manufactured homes that are placed or substantially improved within zone AE on the community’s FIRM on sites: (1) outside of a 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 a result of a flood; be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to no lower than two (2) feet above the base flood elevation and be securely anchored to an adequately anchored foundation system to resist flotation, collapse, and lateral movement.
(E) 
Require that manufactured homes that are placed or substantially improved on sites in an existing manufactured home park or subdivision within zone AE on the community’s FIRM that are not subject to the provisions of subsection (D) of this section be elevated so that the lowest floor of the manufactured home is no lower than two (2) feet above the base flood elevation.
(F) 
Enclosures for 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 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:
(1) 
A minimum of two openings on separate walls 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.
(2) 
The bottom of all openings shall be no higher than 1 foot above grade.
(3) 
Openings may be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.
(G) 
Require that recreational vehicles placed on sites within Zones A1-30, AH, and AE on the community’s FIRM either (1) be on the site for fewer than 180 consecutive days, or (2) be fully licensed and ready for highway use, or (3) meet the permit requirements of § 151.21, and the elevation and anchoring requirements for “manufactured homes” in subsections (C), (D), and (E) of this section. 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 254-87-04-28, passed 4-28-87; Am. Ordinance 970-08-10-14, passed 10-14-08; Ordinance 1180-14-06-24, §§ 4–7, passed 6-24-14)
(A) 
All proposed subdivisions, including manufactured home parks, shall:
(1) 
Be in conformance with the provisions of this chapter;
(2) 
Have adequate drainage measures in order to reduce exposure to flood hazards; and
(3) 
Have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed so as to minimize or eliminate flood damage.
(B) 
In all areas of special flood hazard where base flood elevation data are not available, the applicant shall provide a hydrologic and hydraulic engineering analysis that generates base flood elevation for all subdivision proposals, and other proposed developments at least 5 acres or 5 lots in size, whichever is the lesser. These studies shall be submitted to FEMA with a request for map revision.
(1) 
All preliminary plans for platted subdivisions shall identify the flood hazard area and elevation of the base flood.
(2) 
All final subdivision plats will provide the boundary of the special flood hazard area, the floodway boundary, base flood elevations, and finished floor elevations for lots in or immediately adjacent to the SFHA.
(3) 
Approval shall not be given for streets within a subdivision which would be subject to flooding in the base flood. All street surfaces must be located at or above the base flood elevation.
(Ordinance 254-87-04-28, passed 4-28-87; Ordinance 1180-14-06-24, § 8, passed 6-24-14 Penalty, see § 151.99)
(A) 
Located within the areas of special flood hazard established in § 151.04, are areas designated as areas of 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, where the path of flooding is unpredictable, where velocity flow may be evident, and where flooding is characterized by ponding or sheet flow.
(B) 
The following provisions shall apply to areas of shallow flooding:
(1) 
All new construction and substantial improvements of residential structures shall have the lowest floor, including the basement, elevated above the highest adjacent grade, at least as high as the depth number specified in feet on the community’s FIRM or at least two feet if no depth number is specified on the FIRM.
(2) 
All new construction and substantial improvements of nonresidential structures shall:
(a) 
Have the lowest floor, including the basement, elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community’s FIRM or at least two feet if no depth number is specified on the FIRM; or
(b) 
Together with attendant utility and sanitary facilities, 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 of effects of buoyancy.
(3) 
A registered professional engineer or architect shall submit a certification to the Floodplain Administrator that the standards of this section are satisfied.
(4) 
Drainage paths around structures situated on slopes shall be required within Zones AH or AO to guide flood waters around and away from such structures.
(Ordinance 254-87-04-28, passed 4-28-87 Penalty, see § 151.99)
Located within areas of special flood hazard established in § 151.04 are areas designated as floodways which have a high erosion potential and are extremely hazardous due to the velocity of their flood waters which carry debris and potential projectiles. The following provisions shall apply to floodways:
(A) 
Encroachments shall be prohibited, including fill, new construction, substantial improvements, and other development unless certification by a professional registered engineer or architect is provided demonstrating that such encroachments will not result in any increase in flood levels within the community during the occurrence of the base flood discharge.
(B) 
Subject to satisfaction of the requirements of division (A), above, all new construction and substantial improvements situated within a floodway must comply with all applicable flood hazard reduction provisions.
(Ordinance 254-87-04-28, passed 4-28-87 Penalty, see § 151.99)
(A) 
Periodic inspection of the site being developed pursuant to this flood damage prevention chapter may be made by the Floodplain Administrator to check for compliance with the development permit approved for the site. The procedure for inspection shall conform with the procedures for building inspections insofar as such procedures are reasonably susceptible to such application.
(B) 
(1) 
The development permit holder shall request a final inspection of the site development. The Floodplain Administrator shall perform the final inspection and shall determine whether the development conforms with the plans and specifications approved for such site.
(2) 
If the site development does not conform with all the plans and specifications approved for the development site, the Building Official shall submit to the permit holder a list of deficiencies. The permit holder shall thereafter request a reinspection and the procedures set forth in division (B)(1) above, shall be repeated.
(C) 
Until all development for which a development permit was issued is complete and all such development has been approved by the Floodplain Administrator, no certificate of occupancy nor utility service connection for permanent utility service will be issued or approved by the city.
(Ordinance 254-87-04-28, passed 4-28-87)