Agenda - 11-03-1986 - Laserfiche WebLink

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ti B Section 8 - Mandatory Standards for Land-disturbing Activity No land-disturbing activity subject to the control of this Ordinance shall be undertaken except in accordance with the following mandatory standards; a. Buffer Zone - no land-disturbing activity shall be permitted in proximity to a lake or natural watercourse unless a buffer zone is provided along the margin of the watercourse of sufficient width to confine visible siltation within the twenty-five percent (25%) of the buffer zone nearer the land-disturbing activity, provided that this subsection (a) shall not apply to a land-disturbing activity in connection with the construction of facilities to be located on, over, or under a lake or natural watercourse. b. Graded Slopes and Fills - the angle for graded slopes and fills shall be no greater than the angle which can be retained by vegetative cover or other adequate erosion control devices or structures. In any event, slopes left exposed will, within 30 working days of completion of any phase of grading, be planted or otherwise provided with ground cover, devices, or structures sufficient to restrain erosion. c. Ground Cover - whenever land-disturbing activity is under- taken on a tract comprising more than 20,000 square feet, if more than 20, 000 contiguous square feet are uncovered, the person conducting the land-disturbing activity shall install such sedimentation and erosion control devices and practices as are sufficient to retain the sediment generated by the land-disturbing activity within the boundaries of the tract during construction upon and development of said tract, and shall plant or otherwise provide a permanent ground cover sufficient to restrain erosion after completion of construc- tion or development within 30 working days or 120 calendar days following completion, whichever period is shorter. d. Desi.n and Performance of Control Measures - erosion and sedimentation control measures, structures, and devices shall be so planned, designed, and constructed as to provide protection from accelerated erosion and sedimentation from the calculated maximum peak rates of runoff from the ten-year frequency storm. Runoff rates shall be calculated using the procedures in the USDA Soil Conservation Service' s "National Engineering Field Manual for Conservation Practic- es, " or other calculation procedures acceptable to the Erosion Control Officer. e. Prior Plan A.pproval - No person shall initiate any land-disturbing activity if more than 20,000 square feet are to be uncovered unless, thirty or more days prior to initi- ating the activity, an erosion and sedimentation control plan for such activity is filed with, approved by, and a Grading Permit obtained from the Erosion Control Officer.