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<br />topsoil stripping scenario for a pond design, theoretically, all ponds will have an <br />extraordinarily large built-in factor of safety, <br />Considering all of this, the ponds are clearly adequately sized to handle the very <br />limited amount of anticipated pit pumping. <br />5- Issue #4 <br />Rule 4.05.61311c) requires a nonclogging dewatering device or conduit spillway to <br />remove water storage resulting from inflow. All of Colowyo's sedimentation ponds employ <br />a manually operated, slide headgate as the dewatering device. No trash racks are employed <br />on any of these dewatering devices. <br />Trash racks are sometimes used on top of the primary spillways to keep sticks and <br />debris from entering the culverts should a large event fill the pond. Since the primary <br />spillway is net the designated dewatering device, the cited rule does not apply. <br />Please contact me if you have any further questions concerning ponds. In the <br />interest of the efficient use of the Division's time as well as our time, should the Division <br />have additional concerns, we encourage you to consider scheduling a meeting with us to <br />resolve them. Our goal is to avoid having pond issues continue to surface in our future <br />dealings with the Division. <br />Sincerely, <br />~ k~~ <br />~mes A. Ki er <br />9 <br />Sr. Environmental Engineer <br />xc: R.G. Atkinson <br />Files <br />3 <br />