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in swales and berms filtering sediment, releasing storm water onto undisturbed areas <br />at historic flow rates wherever possible. Stormwater BMPs (berms, swales and <br />detention basins) will be constructed of overburden and/or mining fines. <br />Setbacks are required from two manmade structures. Colorado Interstate <br />Gas requests a 50 foot setback from the centerline of the high pressure gas line. <br />Xcel Energy requests a 100 foot longitudinal setback along the easements from each <br />structure and a perpendicular setback from the structure to the edge of the <br />easement. <br />Groundwater is not expected to be exposed at this excavation elevation; <br />therefore no impact to the hydrologic balance is anticipated. No acid or toxic <br />producing materials will be exposed during mining. No explosives will be used in <br />conjunction with mining or reclamation. <br />7 <br />Edited June 6, 2016 <br />