§ 17.70.050. Site development standards.

Notwithstanding the provisions of Sections 17.70.020, 17.70.030 and 17.70.040, all uses are subject to the following conditions and restrictions:

A.

Every structure shall be designed and anchored to prevent flotation, collapse or lateral movement of the structure, or portions of it, due to flooding.

B.

All construction materials shall be resistant to flood damage, construction methods and practices which will minimize flood damage shall be used and all public utilities shall be located and constructed to minimize flood damage.

C.

New or replacement domestic water supply systems and sewage disposal systems shall be designed and installed to prevent infiltration and discharges into floodwaters.

D.

The lowest floor, including the basement, of all residential structures or substantial improvements to existing residential structures shall be constructed at least one foot above the base flood level.

E.

The lowest floor, including the basement, of all nonresidential structures, or substantial improvements to existing nonresidential structures may be below the base flood level, provided the structure, utilities and water and sewage disposal facilities are floodproofed to a point at least one foot above the base flood level. When floodproofing is required, a registered civil engineer or licensed architect shall certify that the floodproofing methods are adequate to withstand the flood depths, pressures, velocities, impact and uplift forces, and other factors associated with the base flood level.

F.

All permits from governmental agencies whose approval of development in the restrictive flood zone is required by federal or state law, shall be obtained prior to commencement of construction or installation of any structure, water supply or sewage disposal system.

G.

No work that alters or relocates any portion of a watercourse shall diminish the flood-carrying capacity of the watercourse within the area of alteration or relocation.

H.

The floodplain administrator shall notify adjacent communities and the State Department of Water Resources prior to any permitted alteration or relocation of any watercourse within this zone district brought to the attention of the county.

I.

All mobile homes to be placed or substantially improved within this zone district shall be elevated on a permanent foundation such that the lowest floor of the mobile home is at or above the base flood elevation and be securely anchored to an adequately anchored foundation system. The mobile home shall be certified under the National Mobile Home Construction and Safety Act of 1974 (42 U.S.C. Section 85401 et seq.).

J.

Electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities shall be designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.

K.

All new construction and substantial improvements, with fully enclosed areas below the lowest floor (excluding basements) that are usable solely for parking of vehicles, building access or storage, 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 must meet or exceed the following minimum criteria:

1.

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.

2.

The bottom of all openings shall be no higher than one foot above grade.

3.

Openings may be equipped with screens, louvers or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.

L.

All recreational vehicles placed on permitted sites within a recreational vehicle park or campground which lie within zones A, A1-A30, AH, and AE on the community's Flood Insurance Rate Map shall be on the site for fewer than one hundred eighty consecutive days and shall 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).

(Ord. 97-4 § 32, 1997; prior code § 5.02.340 (E))