Laserfiche WebLink
C. Southwest Lake: The perimeter drain, from A above, will extend directly into this lake <br />and keep the lake surface from increasing above pre-existing levels to the north of the <br />lake along the southern boundary of clay liner. <br />D. Eastern Lakes: In the event that the trigger point for the eastern lakes is reached, the <br />operator will commit to rectifying the situation. One way this could occur is to deliver <br />its pro-rata interest in the Rural Ditch Company directly to one or all of the lakes <br />through the existing ditch lateral currently located immediately adjacent to and east of <br />the permit boundary. This will also serve to protect any existing wells located to the <br />east of the site in the vicinity of the existing lakes. <br />In addition, the existing unlined lakes to the east of the site may also be impacted by the <br />dewatering operation prior to lining of the site. If the water levels decrease four or more feet <br />below the baseline elevation, as described above, the operator will dewater the active cell <br />duectly to the lakes, rather than the St. Vrain River. <br />Again, the operator will notify the DBMS within 7 days if any of the trigger points are reached. <br />The operator will then commit to implementing or re-evaluating the above described mitigation <br />measures within 45 days of notifying the DRMS. <br />100-Year F1oodQlain <br />Most of the area for the Hokestra Pit is within the 100-yeaz floodplain of the St. Vrain River. If <br />temporary stockpiles aze necessary, they will either be located in the pit or parallel to the flow of <br />the river. <br />Water Quality <br />A current CDPS Permit issued by the Colorado Department of Public Health and Environment <br />exists for dewatering operations at the Hokestra Pit. This permit will remain active while mining <br />operations dischazge groundwater into the St. Vrain River. <br />Weld County Hokestra Pii <br />DMG U2PermitAmendment <br />Page I S <br />