(A) The Public Works Department is responsible for the implementation and enforcement of this subchapter and Storm Water Quality Management Program for the city.
(B) The Public Works Department shall implement the following:
(1) Establish policies, procedures, standards and criteria relating to storm water runoff quality and quantity;
(2) Develop a local water -quality treatment standard to manage runoff through water-quality control structures. The local standard, at a minimum, shall be based on an analysis of precipitation records to determine the equivalent surface depth of rainfall (e.g. 0.75 inches) produced from an eightieth percentile precipitation event; the water quality standard shall provide water treatment to the MEP for precipitation events equal to or less than the eightieth percentile precipitation event; and
(3) Create a storm water management guidance design manual and standards for development and redevelopment projects that address quantitative controls for increased volume and rate of surface runoff and qualitative controls that reduce or eliminate pollutants carried by runoff;
(C) Until such time existing regulations are modified or new storm water quality and quantity policies, design criteria and standards are developed; to address storm water quality management, reduce water quality impacts and maintain pre-development runoff conditions, the Public Works Department may require the design and implementation of structural and non-structural BMPs for new and redevelopment projects.
(D) The design of structural and non-structural BMPs and preparation of SWPPP shall be by a professional engineer licensed in the Commonwealth of Kentucky to practice in the field of civil works, and be approved by the Public Works Department. Structural and non-structural BMPs shall include but be limited to the following:
(1) Storm water control. Storm water control BMPs shall be utilized to address runoff volume and rate, and remove pollutants. These BMP's may include detention facilities, extended detention basins, retention facilities, hydrodynamic separators, first flush basins, infiltration trenches and drain fields.
(2) Stream corridor protection. Stream corridor protection BMPs shall be utilized to protect designated streams and waterways through conservation methods. These methods may include buffer strips, greenways, vegetated channels, stream bank stabilization and restoration.
(3) Impervious area runoff controls. Impervious area runoff controls shall be utilized to address high levels of runoff quantity and quality associated with high-density developments. These controls may include preservation of open space, minimizing impervious surfaces, porous pavement, utilization of grass swales instead of curb and gutter, reduced pavement widths and similar measures.
(4) Discharge controls. Discharge control BMPs shall be utilized to provide flow attenuation for post-development runoff. These BMPs may include detention facilities, extended detention basins, retention facilities and artificial wetlands.
(Ord. 64-2010, passed 6-24-10)