No alteration, encroachment or substantial improvement may be made in, on, or over any land within areas designated as floodway or floodway fringe by this article and shown on the official flood plain district map without obtaining a flood plain development permit from the Public Works Director.

(A)  Procedure.   Application for a flood plain development permit shall be submitted by the property owner or his or her certified agent to the Public Works Director for review.

(B)  Information Required. An application for a flood plain development permit shall be accompanied by the following: 

(1)   Identification and description of proposed use or development;

(2)   Legal description of the property;

(3)   Plan of the proposed development or use at a scale of one inch equals 50 feet or larger showing the floodway and floodway fringe;

(4)   Use and type of structures proposed;

(5)   The elevation (in relation to mean sea level) of the lowest floor, including basements, of all structures or proposed fill;

(6)   When flood-proofing is proposed, the elevation (in relation to mean sea level) to which the non-residential structure will be flood-proofed;

(7)   Proposed developments which include alteration of watercourses must have evidence submitted by the applicant showing that no adverse impacts will result from the alteration and that the flood carrying capacity within the altered or relocated portion of the watercourse is not diminished.

(8)   Development proposals wholly or partially within the flood plain shall be accompanied by:

(a)   A typical valley cross-section showing the channel of the stream, elevation of land areas adjoining each side of the channel, cross-sectional areas to be altered by the proposed development and information on increases in water elevation.

(b)   Plan (surface view) showing elevations or contours at an interval not greater than two feet; pertinent structure, fill or storage elevations; size, location, and spatial arrangement of all proposed and existing structures on the site; location and elevation of streets, water supply, sanitary facilities, existing land uses and vegetation upstream and downstream (shown by photographs), soil types and permeability, and other pertinent data.

(c)   Profile showing the slope of the bottom of the channel or flow line of the stream.

(9)   Any additional data which the Public Works Director requests that is pertinent to the issuance of a flood plain development permit.