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Stoner engineering & J" urveying <br />Engineering, Testing & Surveying <br />Date: October 3, 2016 <br />To: Tom Bird <br />Manager, Coal Services <br />GCC Energy, LLC �s04`�,�'' <br />6473 County Road 120, <br />Hesperus, CO 81326 JG <br />(970) 385-4528ms`sF: �- 'V` <br />43"L 5 <br />-�00 10<< - <br />VL Ile <br />��. <br />From: Ryan Griglak, P.E. p, °•,® F <br />Project Manager�'�% <br />N a <br />Stoner Engineering & Surveying <br />Re: King Coal I — Quarterly Water Quality Improvements Inspection <br />On September 30, 2016, Ryan Griglak, P.E. visited the GCC Energy, LLC King I Mine site to <br />conduct the quarterly inspection of the water quality features installed to prevent <br />contaminated storm water runoff from escaping the site in events smaller than the 100 -year <br />storm event. <br />There were 9 -inches of water in the west pond and 16 -inches of water in the east pond (see Pic. <br />1) at the time of the inspection. The ponds are both in generally good condition. The required <br />storage volume is adequate at this time based upon the sedimentation gages installed in the <br />ponds. The ponds should continue to be monitored after storm events to ensure that excess <br />sediment does not reduce the required storage capacity available for storm water runoff. <br />The drainage ditches and pipes were generally in good condition (see Pics 2 & 3). All pipes, <br />ditches and sediment traps should be inspected and repaired as necessary, especially after <br />storm events. <br />The drainage for the overall site is functioning well and is generally in good shape. There were <br />no specific items noted during the inspection which required attention. The drainage features <br />have been constructed and are operating as stated in the drainage plan submitted to the <br />Division of Minerals and Geology. <br />P.O. Box 1163 28 South Washington Street Cortez, Colorado 81321 <br />970.565.7483 stonerengineer@frontier.net 970.565.7704 <br />