2016 025 Ordinance - Laserfiche WebLink

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CHAGRIN C/'~ RIVER AARTN BRSD i May 2016 temporary seeding, permanent seeding, mulching, matting, sod stabilization, vegetative buffer strips, phasing of construction operations, the use of construction entrances, and the use of alternative ground cover. Erosion control practices must meet the following requirements: (1) Stabilization. Disturbed areas must be stabilized as specified in Tables 1 and 2 below. Table 1: Permanent Stabilization Area requrin ennanent stabil~xzation~~_. ~ Time-frame ro ap,ly erosion controls _:_ _~ Any area that will lie dormant for one year or more. Within 7 days of the most recent disturbance. Any area within 50 feet of a surface water of the state and at final grade. Within 2 days of reaching final grade. Any other areas at final grade. Within 7 days of reaching final grade within that area. Table 2: Temporary Stabilization Area re wiring tens oraiy slal~ilcatioii: Ti-iie fi-anie to a ~}~1'y c,ic~s_on cc~ritiols ~,, ~,. ~~ Any disturbed area within 50 feet of a surface Within 2 days of the most recent disturbance if that water of the state and not at final grade. area will remain idle for more than 14 days. For all construction activities, any disturbed area, Within 7 days of the most recent disturbance within including soil stockpiles that will be dormant for the area. more than 14 days but less than one year, and not within 50 feet of a surface water of the state. For residential subdivisions, disturbed areas must be stabilized at least 7 days prior to transfer of ownership or operational responsibility. Disturbed areas that will be idle over winter. Prior to November 1 or the onset of winter weather, whichever occurs first. Note: Where vegetative stabilization techniques may cause structural instability or are otherwise unobtainable, alternative stabilization techniques must be employed. (2) Permanent stabilization of conveyance channels. Applicants shall undertake special measures to stabilize channels and outfalls and prevent erosive flows. Measures may include seeding, dormant seeding, mulching, erosion control matting, sodding, riprap, natural channel design with bioengineering techniques, or rock check dams, all as defined in the most recent edition of Rainwater arzd Land Development or the Field Office Technical Guide available at www.nres.usda. goy/technicaUefot~/. (c) RUNOFF CONTROL PRACTICES. The SWP3 shall incorporate measures that control the volume and velocity of stormwater runoff within the site to prevent erosion. Peak flow rates and total stormwater volume shall be controlled to minimize erosion and outlets, downstream channel and streambank erosion. Such practices may include rock check dams, pipe slope drains, diversions to direct flow away from exposed soils and protective grading practices. These practices shall divert runoff away from disturbed areas and steep slopes where practicable. Velocity dissipation devices shall be placed at discharge locations and along the length of any outfall channel to provide non-erosive flow velocity from the structure to a water course so that the natural physical and biological characteristics and functions are maintained and protected. 15