The Floodplain Administrator is authorized to waive the submission of construction documents and other data if it is found that the nature of the work applied for is such that the review of such submissions is not necessary to ascertain compliance with this chapter.
The site plan or construction documents for any development subject to the requirements of this chapter shall be drawn to scale and shall include, as applicable to the proposed development:
(A) 
A site plan prepared by a licensed surveyor;
(B) 
Delineation of flood hazard areas, floodway boundaries and flood zones, and the base flood elevation, as appropriate;
(C) 
If base flood elevations are not included on the FIRM or in the flood insurance study (FIS), delineation of any flood hazard area, flood elevation and floodway data that may be available from Federal, State, or other sources that the Floodplain Administrator determines are applicable pursuant to SCCC § 16.13.400;
(D) 
Location of the proposed activity and proposed structures, and locations of existing buildings and structures;
(E) 
Location, extent, amount, and proposed final grades of filling, grading, or excavation, and location and extent of any proposed alteration of sand dunes;
(F) 
If the placement of fill is proposed: the amount, type, and source of fill material; a description of the intended purpose of the fill areas; evidence that the proposed fill areas are mitigated with compensatory storage; and compaction specifications; and
(G) 
Existing and proposed alignment of any watercourses proposed to be altered.
(Ord. 5350 § 1, 2020)
Where flood hazard areas are delineated on the FIRM and base flood elevation data have not been provided (approximate A Zones) or in unmapped areas identified by the Floodplain Administrator as susceptible to flooding, the Floodplain Administrator shall:
(A) 
Obtain, review, and reasonably use, or require the applicant to obtain and use, available data from a Federal or State agency or other source; or
(B) 
Require that a registered professional engineer develop base flood data prepared in accordance with currently accepted engineering practices; and
(C) 
Require a 25 percent factor of safety be added to the hydrologic analysis when USGS Regional Regression equations are used to calculate the 100-year (one percent chance) peak discharge.
If the base flood data are to be used to support a letter of map change from FEMA, the Floodplain Administrator shall advise the applicant that the analyses shall be prepared in a format required by FEMA, and that it shall be the responsibility of the applicant to satisfy the submittal requirements.
(Ord. 5350 § 1, 2020)
As applicable to the location and nature of the proposed development, and in addition to the requirements of this section, the applicant shall have the following analyses prepared and sealed by a registered design professional for submission with the site plan or construction documents:
(A) 
For activities proposed to be located in a floodway, a floodway encroachment analysis that demonstrates that the proposed development will not cause any increase in the base flood elevation. Any encroachment which would cause any increase in the base flood elevation is prohibited.
(B) 
For activities proposed to be located in a riverine flood hazard area for which floodways have not been designated, a hydrologic investigation, prepared by a registered professional engineer, that determines the base flood elevation and identifies the boundaries of the floodway. If the activities are proposed to be located within the floodway, compliance with SCCC § 16.13.470 is required.
(C) 
For alteration of a watercourse, an engineering analysis prepared in accordance with standard engineering practices which demonstrates that the flood-carrying capacity of the altered or relocated portion of the watercourse will not be decreased, and certification that the altered watercourse shall be maintained in a manner which preserves the channel's flood-carrying capacity; the applicant shall submit such analysis to FEMA as specified in SCCC § 16.13.420.
(D) 
For activities that propose to alter sand dunes in coastal high hazard areas, an engineering analysis that demonstrates that the proposed alteration will not increase the potential for flood damage.
(E) 
For new structures and substantial improvement/damage projects in the coastal high hazard area, a V Zone certificate, provided by the Floodplain Administrator, signed by the project architect or registered professional engineer, stating that the plans comply with all FEMA and County regulations for V Zone construction.
(Ord. 5350 § 1, 2020)
If additional hydrologic, hydraulic or other engineering data and studies are submitted to support an application, the applicant has the right to seek a Letter of Map Change from FEMA to change the base flood elevations, change floodway boundaries, or change boundaries of flood hazard areas shown on the FIRM, and to submit new technical data to FEMA for such purposes. The analyses shall be prepared by a licensed professional engineer in a format required by FEMA. Submittal requirements and processing fees shall be the responsibility of the applicant. The applicant shall notify the Floodplain Administrator of such submittal.
(Ord. 5350 § 1, 2020)
In addition to other requirements of this chapter, the site plan or construction documents for buildings and structures located in whole or in part in flood hazard areas shall include:
(A) 
In flood hazard areas other than coastal high hazard areas, the elevation of the proposed lowest floor of structures proposed to be elevated.
(B) 
In flood hazard areas other than coastal high hazard areas, the elevation below which nonresidential buildings and structures, if not proposed to be elevated, will be dry floodproofed.
(C) 
In areas of shallow flooding shown on FIRMs as AO Zones, the height of the proposed lowest floor, including basement, above the highest adjacent grade as established by a licensed surveyor.
(D) 
In coastal high hazard areas, the elevation of the bottom of the lowest horizontal structural member of the lowest floor.
(E) 
In coastal high hazard areas, the location of any proposed building, which shall be landward of the reach of mean high tide.
(Ord. 5350 § 1, 2020)