ORD-2007-017 - Sedimentation and Erosion Control Ordinance

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Orange County SE & SC Ordinance °°^«°~~~~.,ber'-'-~°"o'~Seotember 12; 20h6 G. Manage Stormwater Runoff When the increase in the peak rates and velocity of storm water runoff resulting from a land-disturbing activity is sufficient to cause accelerated erosion of the receiving watercourse, plans are to include measures to control the velocity and the rate of release at the point of discharge so as to minimize accelerated erosion of the site and increased sedimentation of the stream. H. Open Burning The Plan should specify the method of disposal of trees, limbs, stumps and construction debris associated with the activity; which shall be by some method other than open burning. SECTION 8 MANDATORY DESIGN AND PERFORMANCE 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 during periods of construction or improvement to land 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 nearest the land-disturbing activity. Waters that have been classified as trout waters by the Environmental Management Commission shall have an undisturbed buffer zone 25 feet wide or of sufficient width to confine visible siltation within the twenty-five percent (25%) of the buffer zone nearest the land-disturbing activity, whichever is greater. Provided, however, that the County may approve plans which include land-disturbing activity along trout waters when the duration of said disturbance would be temporary and the extent of said disturbance would be minimal. This subdivision shall not apply to aland-disturbing activity in connection with the construction of facilities to be located on, over, or under a lake or natural watercourse. Unless otherwise provided, the width of a buffer zone is measured from the edge of the water to the nearest edge of the disturbed area, with the 25 percent of the strip nearer the land disturbing activity containing the natural or artificial means of confining visible siltation. 2. The 25 footminimum width for an undisturbed buffer zone adjacent to designated trout waters shall be measured horizontally from the top of the bank. 3. Where a temporary and minimal disturbance is permitted as an exception by Section 8 (A) (1) of this ordinance, land-dishzrbing activities in the buffer zone 13