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INDIAN RIVER COUNTY ORDINANCE NO. 86 - 36 AN ORDINANCE OF INDIAN RIVER COUNTY, FLORIDA, AMENDING INDIAN RIVER COUNTY ORDINANCE NO. 85-44, THE GENERAL PROVISIONS SECTION OF THE ZONING CODE, ESTABLISHING SECTION 25(S) STORMWATER DIS- CHARGE FROM SINGLE-FAMILY LOTS; PROVIDING INCLUSION IN CODE; SEVERABILITY; AND EFFECTIVE DATE. NOW, THEREFORE, BE IT ORDAINED BY THE BOARD OF COUNTY COMMIS- SIONERS OF INDIAN RIVER COUNTY, FLORIDA, that: SECTION 1. Indian River County Ordinance No. 85-44 is hereby amended to establish Section 25(S) of the Zoning Code to read: To ensure that stormwater runoff is adequately managed, each applicant for single-family home building permit approval shall submit a conceptual drainage plan as part of their building plot plan or parcel survey, if the building lot or parcel is not located in a subdivision having a positive drainage system previ- ously approved by the Public Works Director. A list of "previous- ly approved" subdivisions shall be on file at: 1. the Building Division, 2. the Public Works Division, and 3. the Planning and Development Division. The conceptual drainage plan shall depict the existing or proposed stormwater management system including swales, finished ele- vations, transition grades to abutting property, any off-site tributory drainage entering the property, existing and proposed drainage system improvements (if needed), and other pertinent information as may be required by the Public Works Director. All conceptual drainage plans required by the Public Works Direc- tor must be approved by the Public Works Director prior to the issuance of a building permit. The Public Works Director shall approve conceptual drainage plans and approve revisions to such plans if it is determined that by constructing in accordance with the plans. 1. the stormwater runoff generated from a 10 year 24 hour storm (such storm producing 7.44" of rainfall) will be retained on the applicant's building site; or 2* the stormwater runoff generated from a 10 year 24 hour storm (such storm producing 7.44" of rainfall) will be partially retained on the applicant's building site and the remainder will be legally routed off of the appli- cant's building site to a publicly or privately main- tained drainage system having sufficient capacity to adequately accommodate the additional stormwater run-off to be created by the proposed structure(s). No certificate of occupancy shall be issued where improvements depicted upon a conceptual drainage plan approved by the Public Works Director have not been constructed in accordance with the approved plan.