A. Water Quality
Stormwater management facilities shall be designed to water quality criteria per the most current issue of the Northwest Florida Water Management District Environmental Resources Applicants' Handbook Vol II.
B. Water Quantity
For stormwater attenuation stormwater facilities shall be designed such that post development runoff shall not exceed predevelopment runoff for the 25-year, 24-hour storm event. Stormwater management facilities shall be designed and constructed per the most current issue of the Northwest Florida Water Management District Environmental Resources Applicants' Handbook Vol II.
C. The Stormwater management facility design must be certified by a registered professional engineer and include calculations of maximum runoff, water quality treatment, and best management practices for erosion and sedimentation control. The stormwater management facility shall be designed to accommodate the stormwater that originates within the development. The stormwater facility shall not be required to attenuate or treat off-site runoff, provided offsite runoff may be conveyed around the stormwater facility. In no case shall off-site runoff be impeded.
D. For all development, grading, filling, excavation, storage, or disposal of soil and earth materials associated with development activities shall be undertaken so as to reduce the potential for soil erosion and sedimentation of water bodies or drainage ways. For some developments, the City may require an erosion and sediment control plan.
E. The developer or owner shall use swale drainage to the maximum extent possible, except where it is physically unfeasible as determined by the Public Works Director. If feasible, perforated pipe shall be used within the swale for infiltration purposes in situations where piping is necessary.
F. For development landward of the Coastal Construction Control Line (CCCL) outside the 100/500-year flood plain as indicated on the best available FEMA Flood Insurance Rate Map, finish floor shall be set to one (1) foot above the crown of the road or access roads directly adjacent to the property. If there is more than one (1) road adjacent to the property, then the road with the highest elevation shall be used. For development landward of the CCCL within Zones AE, VE, or X, the elevation requirements from Section 4.05.00, et seq., including the City's Technical Amendments to The Florida Building Code must be followed. For development seaward of the CCCL, finish floor shall be set to the Florida Department of Environmental Protection requirement. An administrative variance may be granted to the requirement for elevation above the street where the applicant demonstrates that the natural lay of the land provides adequate drainage away from the street and the proposed structure will be one (1) foot above the highest adjacent grade.
G. Stormwater management systems shall be designed for ease of maintenance and operations and low maintenance costs. It is suggested that the required stormwater system be integrated into a site's open areas and landscaping and that they be used as recreational park areas. They system should be constructed in such a manner (i.e., gentle slopes, grassed, plantings, etc.) that it will be an amenity to the development.
H. Projects that are to be developed in phases will require submission of a master plan of the applicant's contiguous landholdings. Applications for individual project phases may only be considered when the phases and the stormwater systems are independent of contiguous landholdings or a regional stormwater management facility is installed with the first phase of development.
I. Violations. Any development that is not within the scope of the Florida Building Code but that is regulated by this Section that is performed without an issued permit, that is in conflict with an issued permit, or that does not fully comply with this Section, shall be deemed a violation of this Section, in addition to any other applicable law. A building or structure without the documentation of elevation of the lowest floor, other required design certifications, or other evidence of compliance required by this Section or the Florida Building Code is presumed not to be a violation until such time as that documentation is provided. Violations will result in suspension or revocation of the applicable development order, building permit, or both. In the event of a violation in instances when no development order or building permit was issued, the City will require all work to cease until the violation is resolved. Civil Penalties shall be assessed for violations pursuant to the procedures provided by Section 7.10.00. The civil penalty for a violation of this Section 4.06.00 shall be $100.00 if the violation occurs on a residential lot that is being individually developed and $250.00 for all other types of development. Penalties may increase or multiply pursuant to the Section 7.10.00 rules for repeat and continuing violations.
(Ord. 711, passed 2-5-2019; Am. Ord. 720, passed 5-28-2019)