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DRAFT <br />927.05 STREETS UTILITIES AND PUBLIC SERVICES CODE 66F <br />(D) Drainage Area Map. (Before and After Development) <br />(1) An aerial photograph with a scale of 1"- 100', must be <br /> supplied with the entire drainage area and all sub-areas <br /> noted along with all existing land use conditions. <br /> Contours shall be 2' intervals minimum. (Any other <br /> submittal shall meet with prior approval of the City <br /> Engineer.) <br />(2) All existing drainage facilities must be noted along with all <br /> necessary field data. <br />(3) All natural waterways must be noted, and cross-sections of <br /> all waterways must be submitted along with any other data <br /> to sufficiently determine the exact time of concentration or <br /> travel time. <br />(4) All existing and proposed modifications to drainage system <br /> must be noted. <br />(5) A complete Storm Sewer Design noting all proposed storm <br /> sewers, culverts and other storm water management <br /> facilities must be submitted. <br />(6) Emergency Flow Way must be shown on this plan, the flow <br /> route for a 1-year storm conveyed thru the proposed <br /> proj ect. <br />(E) <br />927.05 SEDIMENT POLLUTION CENTRAL STANDARDS. <br />(a) In order to control sediment pollution of the waters of the City of North Olmsted <br />and the State of Ohio, the owner or person responsible for the development area shall use <br />conservation planning and practices to maintain the level of conservation established by the <br />minimum standards. <br />(b) The minimum standards are general criteria and shall not limit the right of the <br />City Engineer to impose additional, more stringent requirements whenever a plan which meets <br />the requirements of this Chapter is not adequate due to special circumstances. <br />(c) Erosion and sediment control practices used to satisfy the standards shall meet the <br />specifications in the current edition of Water Management and Sediment Control for Urbanizing <br />Areas (Soil Conservation Service, Ohio). <br />The minimum standards are listed below: <br />(1) Timing of sediment trappiniz practices. Sediment control practices shall <br />be functional throughout earth disturbing activity. <br />Settling facilities, perimeter controls, and other practices intended to trap <br />sediment shall be implemented as the first step of grading and within <br />seven days from the start of grubbing. They shall continue to function <br />until the upslope development area is restabilized.