In all areas of special flood hazards, the following provisions
are required:
(1) All
new construction and substantial improvements shall be anchored to
prevent flotation, collapse or lateral movement of the structure;
(2) All
new construction or substantial improvements shall be constructed
by methods and practices that minimize flood damage;
(3) All
new construction or substantial improvements shall be constructed
with materials and utility equipment resistant to flood damage;
(4) All
new and replacement water supply systems shall be designed to minimize
or eliminate infiltration of floodwaters into the system;
(5) New
and replacement sanitary sewage systems shall be designed to minimize
or eliminate infiltration of floodwaters into the system and discharges
from the systems into floodwaters; and
(6) On-site
waste disposal systems shall be located to avoid impairment to them
or contamination from them during flooding.
(Ordinance 2-86, sec. 16, adopted 10/21/1986; 1999 Code, sec. 50-101)
In all areas of special flood hazards where base flood elevation data has been provided as set forth in section
3.04.006 or section
3.04.042, the administrator shall obtain, review and reasonably utilize any base flood elevation and floodway data available from a federal, state or other source as criteria for requiring within zone A the following:
(1) Residential construction.
New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to or above the base flood elevation. A registered professional engineer, architect or land surveyor shall submit a certification to the city secretary that the standard of this subsection, as proposed in section
3.04.043(a)(1), is satisfied.
(2) Nonresidential construction.
New construction or substantial improvement of any commercial, industrial or other nonresidential structure shall either have the lowest floor, including basement, elevated to the level of the base flood elevation or, together with attendant utility and sanitary facilities, be floodproofed 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 and effects of buoyancy. A registered professional engineer or architect shall submit a certification to the city secretary that the standards of this subsection, as proposed in section
3.04.043(a)(3), are satisfied.
(3) Mechanical and utility equipment for residential and nonresidential
construction.
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.
(4) Manufactured homes.
(A) No manufactured home shall be placed in a floodway, except in an
existing manufactured home park or existing manufactured home subdivision.
(B) All manufactured homes shall be anchored to resist flotation, collapse
or lateral movement. Specific requirements shall be:
(i) Over-the-top ties at each of the four corners of the manufactured
home, with two additional ties per side at intermediate locations
and manufactured homes less than 50 feet long requiring one additional
tie per side.
(ii)
Frame ties at each corner of the home, with five additional
ties per side at intermediate points and manufactured homes less than
50 feet long requiring four additional ties per side.
(iii)
All components of the anchoring system be capable of carrying
a force of 4,800 pounds.
(iv)
Any additions to the manufactured home be similarly anchored.
(v) For the purposes of this requirement, manufactured homes must also
be elevated and anchored to resist flotation, collapse or lateral
movement. This requirement is in addition to applicable state and
local anchoring requirements for resisting wind forces.
(Ordinance 2-86, sec. 17, adopted 10/21/1986; 1999 Code, sec. 50-102)
(b) All proposals for the development of subdivisions shall meet the development permit requirements of sections
3.04.007 and
3.04.043 and the provisions of section
3.04.071, section
3.04.072 and this section.
(c) Base flood elevation data shall be provided for subdivision proposals and other proposed development which is greater than the lesser of 50 lots or five acres, if not otherwise provided pursuant to section
3.04.006 or section
3.04.042.
(d) All
subdivision proposals shall have adequate drainage provided to reduce
exposure to flood hazards.
(e) All
subdivision proposals shall have public utilities and facilities such
as sewer, gas, electrical and water systems located and constructed
to minimize flood damage.
(Ordinance 2-86, sec. 18, adopted 10/21/1986; 1999 Code, sec. 50-103)