Laserfiche WebLink
<br />Page 14 of26 <br />PennitNo: MNRI0000l <br /> <br />that tlle inspection and maintenance requirements of Part IV.E. are complied with. The location <br />of areas not to be disturbed must be delineated (e.g. with flags, stakes, signs, silt fence etc.) on <br />the development site before work begins. <br /> <br />2. All exposed soil areas with a continuous positive slope within 200 lineal feet of a surface water, <br />must have temporary erosiou protectiou or permanent cover for the exposed soil areas year <br />round, according to the following table of slopes and time frames: <br /> <br />Tvpe of Slope <br /> <br />Time <br /> <br />Steeper than 3: 1 <br />10:1 to 3:1 <br />Flatter than 10: 1 <br /> <br />7 days <br />14 days <br />21 days <br /> <br />(Maximum time an area can <br />remain open when the area <br />is not actively being worked.) <br /> <br />These areas include constructed storm water management pond side slopes, and any exposed <br />soil areas Witll a positive slope to a storm water conveyance system, such as a curb and gutter <br />system, stonn sewer inlet, temporary or pemlanent drainage ditch or otller natural or man made <br />systems that discharge to a surface water. Temporary stockpiles without significant silt, clay or <br />organic components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand <br />stockpiles) are exempt from tllis requirement but must comply with Part IV.C.S. <br /> <br />3. The normal wetted perimeter of any temporary or permanent drainage ditch that drains water <br />from a construction site, or diverts water around a site, must be stabilized within 200 lineal feet <br />from the property edge, or from the point of discharge to any surface water. Stabilization must <br />be completed within 24 hours of connecting to a surface water. <br /> <br />4. Pipe outlets must be provided with temporary or permanent energy dissipation within 24 hours <br />of connection to a surface water. <br /> <br />C. SEDIMENT CONTROL PRACTICES <br /> <br />I. Sediment control practices mnst minimize sediment from entering snrface waters, including <br />curb and gutter systems and storm sewer inlets. <br /> <br />a. Temporary or permanent drainage ditches and sediment basins that are designed as part of a <br />treatment system (e.g., ditches with rock check dams) require sediment control practices <br />only as appropriate for site conditions. <br /> <br />b. Ifthe down gradient treatment system is overloaded, additional upgradient sediment control <br />practices must be installed to eliminate the overloading, and the SWPPP must be amended to <br />identify these additional practices as required in Part m.AA, a. through c. <br /> <br />c. In order to maintain sheet flow and minimize rills and/or gnllies, there shall be no unbroken <br />slope length of greater than 7 S feet for slopes with a grade of 3: I or steeper. <br /> <br />2. Sediment control practices must be established on all down gradient perimeters before any <br />upgradient land disturbing activities begin. These practices shall remain in place until final <br />stabilization has been established in accordance with Part IV.G. <br /> <br />wq-strm2~51 <br />