§ 151.20 GENERAL STANDARDS.

   (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 homes not otherwise regulated by the Ohio Revised Code pertaining to manufactured home parks shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy. Methods of anchoring may include, but are not to be limited to, use of over-the-top or frame ties to ground anchors.

   (B)   Construction materials and methods.

      (1)   All new construction and substantial improvements shall be constructed with materials resistant to flood damage;

      (2)   All new construction and substantial improvements shall be constructed using methods and practices that minimize flood damage; and

      (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.

   (C)   Utilities. The following standards shall apply to all water supply, sanitary sewerage and waste disposal systems not otherwise regulated by the Ohio Revised Code:

      (1)   All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system;

      (2)   New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharge from the systems into flood waters; and

      (3)   On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.

   (D)   Subdivision proposals.

      (1)   All subdivision proposals, including manufactured home subdivisions, shall be consistent with the need to minimize flood damage;

      (2)   All subdivision proposals, including manufactured home subdivisions, shall have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize flood damage;

      (3)   All subdivision proposals, including manufactured home subdivisions, shall have adequate drainage provided to reduce exposure to flood damage; and

      (4)   All subdivision proposals, including manufactured home subdivisions, shall meet the specific standards of § 151.21(F).

('80 Code, § 1313.08) (Ord. 64-95, passed 7-17-95) Penalty, see § 151.99

§ 151.21 SPECIFIC STANDARDS.

   In all areas of special flood hazards where base flood elevation data have been provided as set forth in §§ 151.04 and 151.36(B), the following provisions are required:

   (A)   Residential construction. New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to or above one foot above the base flood elevation.

   (B)   Nonresidential construction. New construction and substantial improvement of any commercial, industrial or other nonresidential structure shall either have the lowest floor, including basement, elevated to the level of one foot above the base flood elevation; or, together with attendant utility and sanitary facilities, shall:

      (1)   Be floodproofed so that the structure is watertight with walls substantially impermeable to the passage of water to one foot above the level of the base flood elevation;

      (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 design and methods of construction are in accordance with accepted standards of practice for meeting the standards of this division. Such certification shall be provided to the official as set forth in § 151.35(A)(3).

   (C)   Accessory structures. A relief to the elevation or dry floodproofing standards may be granted for accessory structures (e.g., sheds, detached garages) containing 576 square feet or less in gross floor area. Such structures must meet the encroachment provisions of § 151.22(A) and the following additional standards:

      (1)   They shall not be used for human habitation;

      (2)   They shall be designed to have low flood damage potential;

      (3)   They shall be constructed and placed on the building site so as to offer the minimum resistance to the flow of flood waters;

      (4)   They shall be firmly anchored to prevent flotation; and

      (5)   Service facilities such as electrical and heating equipment shall be elevated or floodproofed.

   (D)   Manufactured homes and recreational vehicles. The following standards shall apply to all new and substantially improved manufactured homes not subject to the manufactured home requirements of R.C. § 3733.01, and recreational vehicles.

      (1)   Manufactured homes shall be anchored in accordance with § 151.20(A)(2).

      (2)   Manufactured homes shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is at the base flood elevation.

      (3)   Recreational vehicles shall:

         (a)   Not be located on sites in special flood hazard areas more than 180 days;

         (b)   Be licensed and ready for highway use; or

         (c)   Meet the standards of § 151.22(D)(1) and (2).

   (E)   Enclosures below the lowest floor. The following provisions apply to all new and substantially improved residential and nonresidential structures which are elevated to one foot above the base flood elevation using pilings, columns, or posts. 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 floodwater. Designs for meeting this requirement must:

      (1)   Be certified by a registered professional engineer or architect; or

      (2)   Meet or exceed the following 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. Openings may be equipped with screens, louvers, valves or other coverings provided that they permit the automatic entry and exit of floodwater.

   (F)   Subdivisions and large developments. In all areas of special flood hazard where base flood elevation data have not been provided in accordance with §§ 151.04 and 151.36(B), the following standards apply to all subdivision proposals, including manufactured home subdivisions, and other proposed developments containing at least 50 lots or 5 acres (whichever is less):

      (1)   The applicant shall provide base flood elevation data performed in accordance with standard engineering practices;

      (2)   If division (F)(1) above is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of §§ 151.20 and 151.21.

('80 Code, § 1313.09) (Ord. 64-95, passed 7-17-95; Am. Ord. 07-04, passed 2-2-04)

§ 151.22 FLOODWAY.

   (A)   Areas with floodways. The Flood Insurance Study referenced in § 151.04 identifies a segment within areas of special flood hazard known as a floodway. Floodways may also be delineated in other sources of flood information as specified in § 151.36(B). 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 within all delineated floodway areas:

      (1)   Prohibit encroachments, including fill, new construction, substantial and other improvements, and other development unless a hydrologic and hydraulic analysis performed in accordance with standard engineering practice demonstrates that the proposed encroachments would not result in any increase in flood levels during the occurrence of the base flood discharge.

      (2)   If division (A)(1) above is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of §§ 151.20 and 151.21.

      (3)   Any encroachment within the floodway that would result in an increase in base flood elevations can only be granted upon the prior approval by the Federal Emergency Management Agency. Such requests must be submitted to the City Engineer to the Federal Emergency Management Agency and must meet the requirements of the National Flood Insurance Program.

   (B)   Areas without floodways. In all areas of special flood hazard where FEMA has provided base flood elevation data as set forth in § 151.04, but FEMA has not delineated a floodway, the following provisions apply:

      (1)   New construction, substantial improvements, or other development (including fill) shall only be permitted if it is demonstrated that the cumulative effect of any proposed development, when combined with all other existing and anticipated development, shall not increase the water surface elevation of the base flood more than one foot at any point.

      (2)   If division (B)(1) above is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of § 151.20.

('80 Code, § 1313.10) (Ord. 64-95, passed 7-17-95)

§ 151.23 FILL.

   Located within areas of special flood hazard established in § 151.04, no fill shall be placed between the floodway and the base flood elevation or between the floodway and 20 feet from the floodway, whichever is less.

('80 Code, § 1313.11) (Ord. 64-95, passed 7-17-95)

ADMINISTRATION AND ENFORCEMENT