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Technical Revision #1 — Sullivan Aggregate Pit M-2015-007 <br /> Originally Submitted June 21, 2017 <br /> Responses to Adequacy Review #2 of July 7, 2017 <br /> 1. Pursuant to Rule 3.1.5(3), all grading shall be done in a manner to control erosion and <br /> siltation of the affected lands, to protect areas outside of the affected land from slides and <br /> other damage. Please describe the best management practices which will be utilized to <br /> prevent sediment from leaving the site during construction of the access road on the north <br /> side of the river. <br /> Until it is reclaimed, the existing north access road will maintain the 3 swales that are already <br /> approved in the permit. This design,from Exhibit G of the approved permit, is enclosed below: <br /> The access road on the north side of the River Crossing will have (3)-2 foot high <br /> swales to trap sediment and avoid a discharge. One will be near the top of the road <br /> where the road starts downward toward the River, the other is at the midpoint and the <br /> third is 2'vertically above the normal high water level in the River. The lowest swale <br /> will have 3 sides so that water cannot go around the swale to the River. All of these <br /> swales are shown on Map C-2. The south side access road is at a much milder grade <br /> and very little of the road runoff will drain to the River. For this reason, only (1)—2 <br /> feet high swale is needed. This swale is also 3-sided to prevent any runoff from <br /> reaching the River. <br /> The area that drains to the northern 3-sided swale is 0.08 acres. This is the area to the middle <br /> swale over a width of 25 feet. The area draining to the south side crossing is 0.05 acres The <br /> runoff from these areas are calculated below: <br />