A city stormwater permit is required for all commercial, industrial, or multi-residential development or redevelopment or for new development or redevelopment projects that disturb one acre or more of land, including projects less than one acre that are part of a larger common plan of development or sale that will result in disturbance of one acre or more.
(A) Application submittal requirements. The following information must be submitted to the municipality for any new development where the impervious cover of the site is greater than 20% and the project disturbs one acre or more of land or is part of a larger common plan of development or sale that will result in disturbance of one acre or more. The applicant must include a signed copy of its Notice of Intent (NOI) for a TPDES General Permit for Storm Water Discharges from Construction Sites, if one is required by the state; a copy of the SWPPP, a copy of the stormwater management concept plan, a copy of the stormwater BMP maintenance agreement, and any required fees. This material must be accompanied with a letter signed and sealed by a licensed engineer indicating that all drainage requirements in this guidance document have been met.
(1) Site analysis and narrative.
(a) Location map, size, and existing land use of the site;
(b) Description of existing land use of all adjacent properties;
(c) General description of existing site topography, natural and manmade features, county's watershed name, drainage patterns, flow paths, receiving waters, soil types and ground cover;
(d) Identify if the following exist on-site:
1. Any body of water, including natural and manmade drainage paths, identifying each as natural or not;
2. Any natural depressions or areas identified as probable areas of inundation for the 100-year storm event;
3. A general description of the proposed uses and improvements, lot subdivision, roadways, and other pertinent improvements; and
4. Phasing and timing of project;
(e) A general description of proposed drainage, water quality, and erosion and sediment control facilities expected to be used on;
(f) Site and the methodology for choosing the facilities;
(g) Total site area and impervious cover planned for the development;
(h) Provide a description of the potential pollutant activities to be conducted at the site, if applicable. Such activities of interest include chemical storage and/or use, vehicle, equipment or boat repair and maintenance, on-site wastewater treatment, product fabrication or washing/cleaning activities;
(i) Confirmation that all applicable regulations and public health and safety requirements will be met by the developer/contractor/ builder; and
(j) A simple drawing to depict the proposed layout, impervious cover areas, general hydrologic information, on-site and adjacent drainage conditions and improvements, and other pertinent information required for site stormwater assessment (a conceptual plan).
(2) Site layout and drainage design.
(a) Legend, north arrow and scale;
(b) Existing property lines, ROWs, structures, impervious surfaces and improvements;
(c) Existing topography - contours;
1. Location of FEMA 100-year Floodplain, Floodway, and Velocity Zone Boundaries that encroach on the site;
(d) Existing drainage patterns, flow paths, stormwater discharge locations, drainage easements;
(e) Limits of existing disturbed area;
(f) Proposed lots and/or building locations, ROWs, roadway locations and cross sections impervious surface areas and pavement types;
(g) Proposed grading (contours or elevations), drainage patterns and basins, discharge locations, and proposed easements;
(h) Size and location and basis of design for all permanent drainage and stormwater quality improvements including: culverts, pipes, detention basins, swales, etc.);
(i) Drainage system maintenance;
(j) Contact information of end-user responsible for inspection, maintenance and repair of stormwater management system (i.e. property owner, Homeowners Association, etc.);
(k) If facilities are to be publicly maintained, municipal staff may benefit from establishing an inspection plan and maintenance plan; and
(l) If facilities are to be privately maintained, include:
1. Inspection plan, which identifies the procedures that will be used to ensure the timely inspection of the control measures; and
2. A description of the maintenance plan for stormwater management devices and practices including operational and physical measures and a proposed schedule.
(B) Application review fee. The fee for review of a land development application shall be based on the amount of land to be disturbed, and a fee structure shall be established by the city.
(Ord. 593-B, passed 7-12-2022)