17.48.050, 17.48.060

Other

• Anchoring required

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

• Development permit required

  A development permit shall be obtained before any construction or development begins within any area of special flood hazard established in Section 17.48.060.

• Enclosed area openings1 sq in per sq ftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

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

• Flood resistant materials

  With flood resistant materials as specified in FEMA Technical Bulletin TB 2-93, and utility equipment resistant to flood damage.

• Floodway encroachment prohibition

  Prohibit encroachments, including fill, new construction, substantial improvement, and other new development unless certification by a registered professional engineer is provided demonstrating that encroachments shall not result in any increase in [the base] flood elevation during the occurrence of the base flood discharge.

• Manufactured homeManufactured homeA dwelling built in a factory to a federal standard and transported to the site. elevation2 ft

  shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated a minimum two feet above the base flood elevation and be securely fastened to an adequately anchored foundation system to resist flotation, collapse, and lateral movement.

• Manufactured homeManufactured homeA dwelling built in a factory to a federal standard and transported to the site. elevation in existing park2 ft

  be elevated so that either: 1. The lowest floor of the manufactured home is a minimum two feet above the base flood elevation; or 2. The manufactured home chassis is supported by reinforced piers or other foundation elements of at least equivalent strength that are no less than thirty-six inches in height above grade.

• Nonresidential floodproofing

  All new construction or substantial improvements of nonresidential structures shall either be: i. Elevated to conform with Section 17.48.200(c)(1); or ii. Floodproofed, together with attendant utility and sanitary facilities, below the elevation recommended under Section 17.48.200(c)(1), so that the structure is watertight with walls substantially impermeable to the passage of water.

• Recreational vehicle requirements180 days

  All recreational vehicles placed on sites within zones Al-30, AH, and AE on the community's Flood Insurance Rate Map will either: 1. Be on the site for fewer than one hundred eighty consecutive days, and be fully licensed and ready for highway use. ... or 2. Meet the permit requirements of Sections 17.48.110, 17.48.120, 17.48.130, and 17.48.135 of this chapter and the elevation and anchoring requirements for manufactured homes in Section 17.48.240(A).

• Residential elevation in A zone2 ft

  In an A zone, elevated to a minimum of two feet above the base flood elevation, as determined by the community.

• Residential elevation in AO zone2 ft

  In an AO zone, elevated above the highest adjacent grade to a height equal to or exceeding the depth number specified in feet on the FIRM, or elevated at least two feet above the highest adjacent grade if no depth number is specified.

• Residential elevation in other zones2 ft

  In all other zones, elevated to a minimum of two feet above the base flood elevation.

• Subdivision identification

  Identify the special flood hazard areas (SFHA) and base flood elevations (BFE).

• Utilities design

  All new and replacement water supply and sanitary sewage systems shall be designed to minimize or eliminate: 1. Infiltration of flood waters into the systems; and 2. Discharge from the systems into floodwaters.