§ 23.07.064. Flood Hazard Area Permit and Processing Requirements.

Drainage plan approval is required where any portion of the proposed site is located within a Flood Hazard combining designation, in addition to all other permits required by this title, state and federal law. In addition to the information called for in Section 23.05.042 (drainage plan required) the drainage plan shall include:

a.

Federal Insurance Administration flood data, including base flood elevations, flood hazard areas and floodway locations.

b.

In areas where water surface elevation data has not been provided by the Federal Insurance Administration, a normal depth analysis or other equivalent engineering analysis that identifies the location of the floodway and demonstrates to the satisfaction of Director of Public Works that the structure will not be located within the floodway or be subject to inundation by the 100-year storm. The following information is required to determine the location of flood elevation and the floodway, except where waived or modified by the Director of Public Works:

(1)

Plans drawn to scale showing the location, dimensions, and elevation of the lot, existing or proposed structures, fill, storage of materials, flood-proofing measures, and the relationship of the above to the location of the floodway.

(2)

Typical valley cross-sections showing the normal channel of the stream, elevation of the land areas adjoining each side of the channel, cross-sections of areas to be occupied by the proposed development, and high-water information sufficient to define the 100-year storm flood profile level.

(3)

A profile showing the slope of the bottom of the channel or flow line of the stream.

(4)

Any previously determined flood data available from any state, federal or other source.

[Amended 2004, Ord. 3025]