ARTICLE XII. PONDING AREAS AND AREAS OF SHALLOW FLOODING.

SECTION 12.1. FLOODPLAIN USE PERMIT.

Uses, new buildings and substantial improvements thereto which are permitted elsewhere in this Regulation may be permitted in Ponding Areas and Areas of Shallow Flooding. A Floodplain Use Permit issued by the Floodplain Administrator shall be required, subject to the applicable provisions set forth below. Issuance of a Floodplain Use Permit does not exempt the holder of the Floodplain Use Permit from any additional requirements for flood insurance.

SECTION 12.2. ZONE AO PONDING AREA.

1.  Any volume displacement shall be equally compensated for from within the same Ponding Area.

2.  New or substantially improved residential buildings shall have the lowest floor elevated at least one foot above the regulatory flood elevation or at least two feet above the highest adjacent grade if no depth number is specified.

3.  New or substantially improved nonresidential buildings shall have the lowest floor either elevated or, together with the building contents and utilities floodproofed, using flood resistant materials, at least one foot above the flood depth at the high point of the natural building pad elevation, and with watertight 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, or the design shall meet the provisions of Section 10.2.10.

4.  Mobile/manufactured homes and recreation vehicles shall be permitted subject to the provisions of Section 10.2.5.

5.  The effective lateral conveyance shall be preserved.

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

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

8.  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 a 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.

9.  All new residential buildings and substantial improvements to residential buildings shall have an Elevation Certificate which may be completed by District staff as approved by the Floodplain Administrator.

10. Whenever an elevation or floodproofing certificate is required, a separate certificate shall be furnished for each building.

SECTION 12.3 ZONE AH PONDING AREA.

1.  Any volume displacement shall be equally compensated for from within the same Ponding Area.

2.  Residential buildings shall have the lowest floor elevated at least one foot above the base flood elevation.

3.  Nonresidential buildings shall have the lowest floor either elevated or, together with the building contents and utilities, shall be floodproofed, using base flood resistant materials, up to at least one foot above the flood elevation with watertight 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, or the design shall meet the provisions of Section 10.2.10

4.  Mobile/manufactured homes and recreation vehicles shall be permitted subject to the provisions of Section 10.2.5.

5.  The effective lateral conveyance shall be preserved.

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

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

8.  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 a 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.

9.  Whenever an elevation or floodproofing certificate is required, a separate certificate shall be furnished for each building.

SECTION 12.4. ZONE A PONDING AREA.

1.  Any volume displacement shall be equally compensated for from within the same Ponding Area.

2.  In Areas of Shallow Flooding designated as a Zone A, new or substantially improved residential buildings shall have the lowest floor elevated at least one foot above the height of the effective outfall or the height of the feature causing the ponding.

3.  New or substantially improved nonresidential buildings shall have the lowest floor either elevated or, together with the building contents and utilities, floodproofed, using flood resistant materials, up to at least one foot above the height of the effective outfall or the height of the feature causing the ponding with watertight 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, or the design shall meet the provisions of Section 10.2.10.

4.  Mobile/manufactured homes and recreation vehicles shall be permitted subject to the provisions of Section 10.2.5.

5.  The effective lateral conveyance shall be preserved.

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

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

8.  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 a 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 10.2.10.9. Whenever an elevation or floodproofing certificate is required, a separate certificate shall be furnished for each building.

SECTION 12.5. ZONE A AREA OF SHALLOW FLOODING.

1.  In Areas of Shallow Flooding other than Ponding Areas, new or substantially improved residential buildings shall have the lowest floor elevated at least one (1) foot above the regulatory flood depth.

2.  New or substantially improved nonresidential buildings shall have the lowest floor either elevated or, together with the building contents and utilities, be floodproofed, using flood resistant materials, up to at least one foot above the base flood elevation, with watertight 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, or the design shall meet the provisions of Section 10.2.10.

3.  Mobile/manufactured homes and recreation vehicles shall be permitted subject to the provisions of Section 10.2.5.

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

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

6.  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 a Floodproofing Certificate by an Arizona Registered Professional Engineer certifying that the flood proofing requirement has been met or the design shall meet the provisions of Section 10.2.10.

7.  Whenever an elevation or floodproofing certificate is required, a separate certificate shall be furnished for each building.