(A) Site plans are required for all development, new construction and substantial improvements determined to be located in a mapped floodplain area and all proposed subdivisions and manufactured home parks. These proposals shall be reviewed by the Floodplain Administrator to assure that they are consistent with the need to minimize flood damage.
(B) The owner or developer shall submit a preliminary site plan to the Floodplain Administrator that includes the following information:
(1) Name of registered professional engineer, licensed professional surveyor or other qualified person responsible for providing the information required in this section;
(2) A map showing the location of the proposed subdivision and/or development with respect to floodplain areas, proposed lot sites and fills;
(3) Where the subdivision and/or development lies partially or completely in the floodplain areas, the plan map shall include detailed information giving the location and elevation of proposed roads, public utilities and building sites. All such maps shall also show contours at intervals of two or five feet depending upon the slope of the land and identify accurately the boundaries of the floodplain areas. A registered professional engineer or licensed professional surveyor must certify the site plan;
(4) All subdivision proposals and other proposed new developments which are proposed to take place either fully or partially within the approximated floodplain area (F4) and which are greater than ten lots or two acres, whichever is the lesser, shall include base flood elevation data and shall delineate a floodway:
(a) When a Flood Insurance Study (FIS) is available from FEMA, the data contained in that study must be used to substantiate the base flood;
(b) If a FEMA Flood Insurance Study is not available the required data may be available from an authoritative source, such as the U.S. Army Corps of Engineers, U.S. Geological Survey, Natural Resource Conservation Service or state and local water resource department; and
(c) If the required data is not available from other sources the applicant shall develop the technical data using detailed methodologies comparable to those contained in a Flood Insurance Study. This data shall be prepared and certified by a registered professional engineer, who shall certify that the methods used correctly reflect currently accepted technical concepts.
(5) Where the subdivision or other development site lies partially in the floodplain area and all proposed development including fill will take place on natural grade a significant vertical distance above the approximated floodplain area (Zone A) boundary depicted on the map, development of detailed base floor elevation data may not be necessary. In these cases the site plan for the proposed development must show contours at intervals of two or five feet depending on the slope, and clearly delineate the area to be developed and the location of the floodplain boundary as scaled from the FEMA map. A registered professional engineer, licensed professional surveyor or others of demonstrated qualifications must certify the site plan.
(Ord. passed 4-14-2010)