Sec. 5A-26. - Standards of construction.

In all areas of special flood hazards the following standards are required:

(1)

Be certified by a registered professional engineer or architect indicating that the standards listed in section 5A-26(2) are satisfied. Such certification shall be provided to the floodplain administrator as set forth in section 5A-22(c).

(2)

Additional standards of construction:

(a)

Anchoring:

(1)

All new construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.

(2)

All manufactured home units shall meet the anchoring standards of section 5A-31(b).

(b)

Construction materials and methods:

(1)

All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage for areas below the base flood elevation.

(2)

All new construction and substantial improvements shall use methods and practices that minimize flood damage.

(3)

All new construction and 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.

(4)

Within Zones AH, AO or VO, adequate drainage paths around structures on slopes shall guide floodwaters around and away from proposed structures.

(c)

Elevation and floodproofing:

(1)

New residential and nonresidential construction and substantial improvement of any structure shall comply with section 5A-22 (b) and have the lowest floor elevated at a minimum to or above the base flood elevation. Upon completion of construction of the elevation of the lowest floor, a registered professional engineer or surveyor shall certify, or the local building inspector shall verify, that the elevation requirements have been met. Notification of compliance shall be submitted to the floodplain administrator as set forth in section 5A-22(c).

(2)

New construction and substantial improvement to any structure in Zone AO shall have the lowest floor elevated above the highest adjacent grade, or at least as high as the depth number specified on the flood insurance rate map (FIRM). If there is no depth number on the flood insurance rate map (FIRM), the lowest floor or basement floor shall be elevated two feet above the highest adjacent grade. Nonresidential structures may meet standards in section 5A-25(c)(3). Upon completion of the structure, the elevation of the lowest floor, including basement, shall be certified by a registered professional engineer or surveyor or verified by the local building inspector to be properly elevated. Notification of compliance shall be submitted to the floodplain administrator as set forth in section 5A-22(c).

(3)

Nonresidential construction shall either be elevated in conformance with section 5A-26(2)(c)(1) or section 5A-26(2)(c)(2) or, together with attendant utility and sanitary facilities:

a.

Be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water; and

b.

Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and

c.

Be certified by a registered professional engineer or architect that the standards of this subsection are satisfied. Such certification shall be provided to the floodplain administrator as set forth in section 5A-22(c).

(4)

For all new construction and substantial improvements, the fully enclosed areas below the lowest floor 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 registered professional engineer or architect or meet the following minimum criteria:

a.

The design includes 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. The bottoms of all openings shall be no higher than one 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; or

b.

The design is certified to comply with local floodproofing standards approved by FEMA.

(5)

Manufactured homes shall meet the above standards and also the standards in section 5A-31.

a.

All manufactured homes that are placed or substantially improved, on sites located: (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 upon which a manufactured home has incurred "substantial damage" as the result of a flood, shall:

(1)

Within Zones A1—30, AH, and AE on the community's flood insurance rate map, be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to or above the base flood elevation and be securely fastened to an adequately anchored foundation system to resist flotation, collapse, and lateral movement.

b.

All manufactured homes to be placed or substantially improved on sites in an existing manufactured home park or subdivision within Zones A1—30, AH, and AE on the community's flood insurance rate map that are not subject to the provisions of section 5A-4 will be securely fastened to an adequately anchored foundation system to resist flotation, collapse, and lateral movement, and be elevated so that either the:

(1)

Lowest floor of the manufactured home is at or above the base flood elevation; or

(2)

Manufactured home chassis is supported by reinforced piers or other foundation elements of at least equivalent strength that are no less than 36 inches in height above grade.

Upon the completion of the structure, the elevation of the lowest floor including basement shall be certified by a registered civil engineer or licensed land surveyor, and verified by the community building inspector to be properly elevated. Such certification and verification shall be provided to the floodplain administrator.

(3)

Applicants and/or developers shall be exempt from complying with the standard listed in section 5A-26(1)(c)(3)a.—c. if sufficient lead time exists in an impending flood to allow for floodproofing or removal of equipment or produce to eliminate flood damage to the structure and its contents.

(Ord. No. 474.1, 3-2-10)

Sec. 5A-27. - Standards for farming practices.

(a)

General farming practices or activities within a designated special flood hazard area shall not be subject to this chapter unless any such practice or activity will either cause a measurable increase in the base flood elevation or adversely affect the carrying capacity of stormwater in the area.

(b)

General farming practices or activities include by way of example, but are not limited to, field cultivation, land leveling, maintenance of irrigation systems, maintenance of field roads, maintenance of agricultural airstrips, and maintenance of flood control levees.

(c)

General farming practices or activities do not include construction and maintenance of buildings or other structures.

(Ord. No. 474.1, 3-2-10)

Sec. 5A-28. - Reserved.

Sec. 5A-29. - Standards for utilities.

(a)

All new and replacement water supply and sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the systems and discharge from systems into floodwaters.

(b)

Onsite waste disposal systems shall be located to avoid impairment to the systems or contamination from the systems during flooding.

(Ord. No. 474.1, 3-2-10)

Sec. 5A-30. - Standards for subdivisions

(a)

All preliminary subdivision proposals shall identify the flood hazard area and the elevation of the base flood.

(b)

All final subdivision plans shall provide the elevation of proposed structure(s), pads and adjacent grade. If the site is filled above the base flood, the final pad elevation shall be certified by a registered professional engineer or surveyor and provided to the floodplain administrator as set forth in section 5A-22(c)(1).

(c)

All subdivision proposals shall be consistent with the need to minimize flood damage.

(d)

All subdivision proposals shall have public utilities and facilities located and constructed to minimize flood damage.

(e)

All subdivision proposals shall have adequate drainage provided to reduce exposure to flood damage. Certification of compliance shall be required of the developer and shall be submitted to the floodplain administrator as set forth in section 5A-22(c)(1).

(Ord. No. 474.1, 3-2-10)

Sec. 5A-31. - Standards for manufactured homes.

All new and replacement manufactured homes and additions to manufactured homes, located within areas of special flood hazard established in section 5A-6, shall be:

(a)

Elevated so that the lowest floor is at or above the base flood elevation pursuant to section 5A-26(2)(c); and

(b)

Securely anchored to a permanent foundation system to resist flotation, collapse or lateral movement.

(Ord. No. 474.1, 3-2-10)

Sec. 5A-32. - Standards for recreation vehicles.

All recreational vehicles placed in Zones A1—30, AH, and AE must either:

1.

Be on the site for fewer than 180 consecutive days; or

2.

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; or

3.

Meet the permit requirements of section 5A-20, of this chapter, and fulfill the elevation and anchoring requirements for manufactured homes in section 5A-31.

(Ord. No. 474.1, 3-2-10)

Sec. 5A-33. - Floodways.

Located within areas of special flood hazard established in section 5A-6 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:

(a)

Encroachments, including fill, new construction, substantial improvements, and other development are prohibited in Floodways unless certification by a registered professional engineer or architect demonstrating that the encroachment(s) shall not result in any increase in flood levels during the occurrence of the base flood discharge. The demonstrated information must be provided to the floodplain administrator.

(b)

If section 5A-33(a) is satisfied, all new construction and substantial improvements shall comply with all other applicable flood hazard reduction provisions of this chapter.

(Ord. No. 474.1, 3-2-10)

Sec. 5A-34. - Flood-related erosion-prone areas.

(a)

The building official shall require permits for proposed construction and other development within all flood-related erosion-prone areas of which the building official has actual notice or written notice from a public entity.

(b)

Such permits shall be reviewed to determine whether the proposed site alterations and improvements will be reasonably safe from flood-related erosion and will not cause flood-related erosion hazards or otherwise aggravate the existing hazard.

(c)

If a proposed improvement is found to be in the path of flood-related erosion or would increase the erosion hazard, such improvement shall be relocated or adequate protective measures shall be taken to avoid aggravating the existing erosion hazard.

(d)

Within Zone E on the Flood Insurance Rate Map, a setback is required for all new development to create a safety buffer consisting of a natural vegetative or contour strip from a lake, riverfront, or other body of water. This buffer shall be designated according to the flood-related erosion hazard and erosion rate, in relation to the anticipated "useful life" of structures and depending upon the geologic, hydrologic, topographic, and climatic characteristics of the land. The buffer may be used for suitable open space purposes, such as for agricultural, forestry, outdoor recreation, and wildlife habitat areas, and for other activities using temporary and portable structures only.

(Ord. No. 474.1, 3-2-10)

Secs. 5A-35—5A-39. - Reserved.