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G104.1 Required.
Any person, owner or owner's authorized agent who intends to conduct any development, as applicable pursuant to Section G102.1, within a flood hazard area, shall first make application to the commissioner and shall obtain the required permit in accordance with Section 28-105.1 of the Administrative Code, notwithstanding any exemption pursuant to Section 28-105.4 of the Administrative Code.
G104.2 Application for permit.
The applicant shall file an application in writing on a form furnished by the commissioner. The commissioner shall not approve such application unless the applicant submits all plans, details, data and documents demonstrating that the development complies with Sections G104.2.1 through G104.2.3 and all other provisions of this appendix.
G104.2.1 Flood zone compliance plans.
The permit application shall include flood zone compliance plans. Such plans shall include plans and drawings, shall be sealed by a registered design professional and shall include a site plan and the following information and any other data as may be required by the department:
1. Flood design class assigned according to ASCE 24;
2. A delineation of the flood hazard areas, including identification of the base flood elevation(s), design flood elevations and stillwater flood depth;
3. If applicable, the location of the regulatory floodway;
4. For all proposed structures, spot ground elevations at building corners and in 20-foot (6096 mm) or smaller intervals along the foundation footprint, or 1-foot (305 mm) contour elevations throughout the building site;
5. Proposed locations of water supply, sanitary sewer, and utilities;
6. Drainage patterns and facilities;
7. Foundation design details, including but not limited to:
7.1. Proposed elevation of the lowest floor including basement (for flood zone purposes) of all structures;
7.2. For crawl spaces and enclosed parking, storage and building access that are wet floodproofed below the design flood elevation, location and total net area of foundation openings in accordance with ASCE 24;
7.3. For dry floodproofed spaces in buildings or structures that are nonresidential (for flood zone purposes), the proposed elevation to which the enclosure will be dry floodproofed in accordance with ASCE 24;
7.4. Any proposed fill and excavation details ; and
7.5. In coastal high-hazard areas and coastal A-zones, the proposed elevation of the bottom of the lowest horizontal structural member of the lowest floor; and
8. For structures in coastal high-hazard areas or coastal A-zones, and for dry-floodproofed structures: flood loading and parameters including average velocity of water (V), debris impact load (F
i
), scour depths, and wave loads (F
t
or F
D
).
Exception: Applications for subdivisions shall comply with Section G302.
G104.2.2 Watercourse alteration.
The permit application shall include documentation required by Section G103.6 and, if applicable, a description of the extent to which any watercourse will be altered or relocated as a result of proposed development.
G104.2.3 Certifications.
The permit application shall include the applicable certifications in accordance with Sections G104.2.3.1 through G104.2.3.3.
G104.2.3.1 A-Zones.
For construction in A-Zones, the permit application shall include the following certifications, as applicable:
1. Wet floodproofing certification. For applications involving wet floodproofed enclosures below the design flood elevation, flood zone compliance plans shall include a certification by the applicant, as applicable to the scope of work proposed, that "in accordance with ASCE 24, the use of the enclosure is limited to the parking of vehicles, building access, or storage, and that the design incorporates openings to allow for the automatic entry and exit of floodwaters for equalization of hydrostatic flood forces and flood damage-resistant materials and techniques that minimize damage to a structure by floodwater."
2. Dry floodproofing certification for nonresidential buildings. For applications involving dry floodproofed buildings and structures that are nonresidential (for flood zone purposes), flood zone compliance plans shall include a certification by the applicant that "the structure is designed to be dry floodproofed with walls that are substantially impermeable to the passage of water and that all walls, floors, and flood shields are designed to resist hydrostatic, hydrodynamic, and other flood-related loads, including the effects of buoyancy resulting from flooding to the elevation listed in Table 6-1 in accordance with ASCE 24."
3. Utility certifications. For all applications involving utility or mechanical work, including applications where such work is to be filed in a separate, related application, flood zone compliance plans shall include a certification by the applicant that "all heating, ventilation, air conditioning, plumbing, electrical and other services facilities and equipment within the structure or site will be located or constructed so as to prevent water from entering or accumulating within the components during conditions of flooding in accordance with ASCE 24."
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