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volume of the permanent pool be equal to or greater than the runoff from a'ZO-inch <br />rainfall for the fully developed site.] 1~ <br />A permanent fKxal length-to-width ratio ot 3:1 or greater; <br />A minimum protective shelf extending ten feet into the permanent pool with a slope <br />of 10:1, beyond which slopes should not exceed 3:1; <br />■» <br />q <br />A protective buffer strip of vegetation surrounding the permanent pool at a minimum <br />width of orie rod (16.5 feet) /this width b corsbtent with the draft rules developed by the <br />Board of Water and Soil Resources under the Wetland Conservation Act of 1991 ]; f <br />All storm water detention facilities sh ill have a device to keep oil, grease, and other <br />floatable material from moving downstream as a result of normal operations; <br />f. Storm water detention facilities for new development must be sufficient to limit peak <br />^ flows in each subwatershed to those that existed before the development for the 10 year <br />storm event. All calculations and hydrologic models/information used in determining <br />peak flows shall be submitted along with the ?torm water management plan; <br />All storm water detention facilities must have a forebay to remove coaise-grained <br />particles prior to discharge into a watercourse or storage basin. <br />9^^ Wetlands . <br />Runoff shall not be discharged directly into wetlands without presettlemcnt of the <br />runoff. <br />2 Co <br />"Ti) A protective buffer strip of natural vegetation at l^t one rod (16.5fc^ in width shall <br />wrround all wetlands. {Thb width b consbtent whk^he draft rula^dJveloped by the ^ ' <br />Board of Water and Soil Resources under the Wetland Conservation Act of 1991. j • ^ <br />3?) Wetlands must not be drained or filled, wholly or partially, unless replaced by restoring <br />or creating wetland areas of at least equal public value. Replacement must be guided v ^ <br />by the following principles in descending order of priority: ^ S <br />Avoiding the direct or indirect impact of the activity that may destroy or diminish ^ <br />the wetland; ^ <br />Minimizing the impact by limiting the degree or magnitude of the v/etland activity \ g n <br />and its implementation; ^ u v <br />[^) Rectifying the impact by repairing, rehabilitating, or restoring the affected wetland b \ <br />environment; ^ ^ >p <br />Reducing or eliminating ihe impact over time by preservation and maintenance ^ ^ \ <br />operations during the life of the activity; and ^ ^ <br />^ VCompensating for the impact by replacing or providing substitute wetland <br />resources or environments. fCompetuatioh, including the replacement ratio and <br />quality of replacement should be conshfMt with the requirements outlined in the <br />rules which will be adopted by the Boambf Water and Soil Resources to implement <br />the Wetland Conservation Act of IRvl.J \ <br />8rtO $teep slopes. No land disturbing or development activities shall be allowed on slopes of 18