§ 15.32.040. Development regulations.

The following regulations apply within zone A, AE:

A.

Residential construction. New construction and substantial improvement of any residential structures shall have the lowest floor, including basement, elevated to or above the base flood elevation.

B.

Nonresidential construction. New construction and substantial improvement of nonresidential structures shall be constructed in accordance with subsection A. of this section, or, together with attendant utility and sanitary facilities, shall be dry floodproofed and be watertight below the base flood level. No lowest floor of a nonresidential structure shall be required to be constructed in accordance with subsection A. of this section or to be dry floodproofed or made watertight if:

1.

A portion of the lowest floor level is above the existing ground;

2.

The lowest floor is to be devoted to the parking of automobiles or limited storage; and

3.

The lowest floor, once such substantial improvement is completed, meets the criteria of section 15.32.050 A. and B.

A registered professional engineer must certify that these floodproofing standards are satisfied.

C.

[ Encroachments. ] Within the floodway, designated on the flood insurance rate map, all encroachments, including fill, new construction, substantial improvements to existing structures, and other development are prohibited unless certification by a registered professional engineer is provided by the applicant demonstrating that such encroachment shall not result in any increase in flood levels during the occurrence of the 100-year flood.

D.

[ Zone A requirements. ] Within zone A, the applicant shall obtain any existing base flood elevation data and it shall be reviewed by the building commissioner for its reasonable utilization toward meeting the elevation or floodproofing requirements of this district.

E.

Mobile homes. All mobile homes shall provide that:

1.

Stands or lots are elevated on compacted fill or on pilings so that the lowest floor of the mobile home will be at or above the base flood level; and

2.

Adequate surface drainage and access for a hauler are provided; and

3.

In the instance of elevation on pilings, lots are large enough to permit steps, piling foundations are placed in stable soil no more than ten feet apart, and reinforcement is provided for piers more than six feet above ground level;

4.

Require that all mobile homes shall be anchored to resist flotation, collapse, or lateral movement by providing over-the-top and frame ties to ground anchors. Specific requirements shall be that:

a.

Over-the-top ties be provided at each of the four corners of the mobile home, with two additional ties per side at intermediate locations and mobile homes less than 50 feet long requiring one additional tie per side;

b.

Frame ties be provided at each corner of the home with five additional ties per side at intermediate points and mobile homes less than 50 feet long requiring four additional ties per side;

c.

All components of the anchoring system be capable of carrying a force of 4,800 pounds;

d.

Any additions to the mobile home be similarly anchored;

5.

Prohibit the placement of mobile homes, except in existing mobile home parks or subdivisions.

F.

[ Watercourses without designated regulatory floodway. ] In zones A and AE, along watercourses that have not had a regulatory floodway designated, the best available federal, state, local, or other floodway data shall be used to prohibit encroachments in floodways which would result in any increase in flood levels within the community during the occurrence of the base flood discharge.

G.

Subdivisions. All subdivision proposals must be designed to assure that:

1.

Such proposals minimize flood damage;

2.

All public utilities and facilities are located and constructed to minimize or eliminate flood damage; and

3.

Adequate drainage is provided to reduce exposure to flood hazards.

(Prior code § 29B-2; Doc. 54/2012, appr./eff. 6-26-12)