Laserfiche WebLink
and/or into a water resource. The Plan will illustrate the type, location, and dimensions of <br />every structural and non-structural storm water management practice incorporated into the <br />site design, and the rationale for their selection. The rationale must address how these storm <br />water management practices will address flooding within the site as well as flooding that <br />may be caused by the development upstream and downstream of the site. The rationale will <br />also describe how the storm water management practices minimize impacts to the physical, <br />chemical, and biological characteristics of on-site and downstream water resources and, if <br />necessary, correct current degradation of water resources that is occurring or take measures <br />to prevent predictable degradation of water resources. <br />B. Preparation by Professional En ig Weer: The Comprehensive Storm Water Management Plan <br />shall be prepared by a registered professional engineer and include supporting calculations, <br />plan sheets, and design details. To the extent necessary, as determined by the Mayfield <br />Village Engineer, a site survey shall be performed by a Registered Professional Surveyor to <br />establish boundary lines, measurements, or land surfaces. <br />C. Community Procedures: The Mayfield Village Engineer shall prepare and maintain <br />procedures providing specific criteria and guidance to be followed when designing the <br />storm water management system for the site. These procedures may be updated from time to <br />time, at the discretion of the Mayfield Village Engineer based on improvements in <br />engineering, science, monitoring, and local maintenance experience. The Mayfield Village <br />Engineer shall make the final determination of whether the practices proposed in the <br />Comprehensive Storm Water Management Plan meet the requirements of this regulation. <br />The Mayfield Village Engineer may also maintain a list of acceptable Best Management <br />Practices that meet the criteria of this regulation to be used in Mayfield Village. <br />D. Contents of Comprehensive Storm Water Mana~;ement Plan: The Comprehensive Storm <br />Water Management Plan shall contain an application, narrative report, construction site plan <br />sheets, along-term Inspection and Maintenance Agreement, and a site description with the <br />following information provided: <br />Site description: <br />a. A description of the nature and type of the construction activity (e.g. <br />residential, shopping mall, highway, etc.). <br />b. Total area of the site and the area of the site that is expected to be disturbed <br />(i.e. grubbing, clearing, excavation, filling or grading, including off-site <br />borrow areas). <br />A description of prior land uses at the site. <br />d. An estimate of the impervious area and percent of imperviousness created <br />by the soil-disturbing activity at the beginning and at the conclusion of the <br />project. <br />e. Existing data describing the soils throughout the site, including the soil <br />series and association, hydrologic soil group, porosity, infiltration <br />characteristics, depth to groundwater, depth to bedrock, and any <br />impermeable layers. <br />