ARTICLE XI. ZONE A DELINEATIONS

SECTION 11.1. FLOODPLAIN USE PERMIT.

The uses and structures in a Zone A Delineation specified in 11.1.1 through11.1.3 below require a Floodplain Use Permit subject to the provisions of Section 11.2. Issuance of a Floodplain Use Permit does not exempt the holder of the Floodplain Use Permit from any additional requirements for flood insurance. Uses for which a Floodplain Use Permit may be granted are:

1.  Any use permitted in Section 9.1 which will not increase the threat of flooding to surrounding property.

2.  Any use permitted in Section 10.1, subject to the provisions of Section 10.2, which will not increase the threat of flooding to surrounding property.

3.  Any other use not specifically named in Sections 9.1 or 10.1 provided the applicant submits an analysis of the Zone A Floodplain consistent with Article VIII. Such delineations shall be subject to review and approval by the Floodplain Administrator prior to issuance of a Floodplain Use Permit and may be forwarded to the State Department of Water Resources and the Federal Emergency Management Agency in the manner described in Article VIII, Section 8.2.

SECTION 11.2 ZONE A DELINEATION DEVELOPMENT STANDARDS.

1.  Uses shall be permitted within the Zone A Delineations as set forth above, provided that the base flood elevation is not more than two (2) feet above the existing ground elevation either at the site of the proposed use or along a line perpendicular to the direction of flow between such site and the limit of the delineated floodplain.

2.  In Zones AE, and A , without a delineated Floodway, development shall be permitted provided that the base flood elevation is not more than two (2) feet above the existing ground elevation and provided it is demonstrated that the cumulative effect when combined with existing and anticipated development shall not increase the water surface elevation beyond the allowable one foot rise.

3.  In order to control erosion and preserve the natural and beneficial functions of the floodplain, removal of vegetation shall be the minimum necessary for development.

4.  Erosion setbacks shall meet Arizona State Standards or as approved by the Floodplain Administrator.

5.  The lowest floor of dwellings other than mobile/manufactured homes shall be elevated and all utilities floodproofed at least (2) two feet above the base flood elevation.

6.  Mobile/manufactured homes are permitted subject to the provisions of Section 10.2.5 except that the bottom of the structural frame shall be elevated at least (1) one foot above the base flood elevation.

7.  The applicant shall provide an Elevation/Floodproofing Certificate by an Arizona Registered Professional Engineer or Land Surveyor to the Floodplain Administrator stating that the elevation or floodproofing requirement has been met.

8.  All nonresidential buildings and substantial improvements thereto shall have the lowest floor elevated or the structure shall be floodproofed one (1) foot above the base flood elevation. Such buildings and substantial improvements thereto shall be watertight with walls substantially impermeable to the passage of water and structural components and utilities having the capacity of resisting the effects associated with a base flood. The applicant shall provide an Elevation certificate completed by an Arizona Registered Land Surveyor or Engineer or, a Floodproofing Certificate by an Arizona Registered Professional Engineer stating that the floodproofing requirement has been met or the design shall meet the provisions of Section 10.2.10.

9.  All new construction and substantial improvements, that fully enclose areas below the lowest floor that are usable solely for parking of vehicles, building access or storage in an area other than a basement 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. The applicant shall provide Floodproofing Certificate by an Arizona Registered Professional Engineer certifying that the floodproofing requirement has been met or the design shall meet the provisions of Section 10.2.10.

10. If fill material is to be used to elevate buildings, such fill material shall meet the requirements of Section 10.2.7.

11.  Fill material for purposes other than solid waste landfills shall meet the requirements of Section 10.2.8.

12.  All subdivision proposals and other proposed new developments greater than fifty (50) lots or five (5) acres, whichever is the lesser, shall include within such proposals base flood elevation data.