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Stoner rnSineer ng & Urveyirig <br />Engineering, Testing & Surveying <br />Date: October 2, 2015 <br />To: Tom Bird <br />Manager, Coal Services <br />GCC Energy, LLC <br />5473 County Road 120 <br />Hesperus, CO 81326 <br />(970) 385-4528 <br />From: Ryan Griglak, P.E;� <br />Project Manager <br />Stoner Engineering & Surveying <br />1 � Y <br />7 <br />43s,_' 5 J <br />Re: King Coal I — Quarterly Water Quality Improvements Inspection <br />On September 30, 2015, 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 approximately 2 -inches of water in the west pond (see Pic. 1) and 4 -inches of water <br />in the east pond at the time of the inspection. The ponds are both generally in good condition. <br />The required storage volume is adequate at this time. In the event that there are frequent or <br />intense storm events during the fall months, the ponds may need to have the excess sediment <br />removed. <br />The drainage ditches and pipes were in generally good condition (see Pic. 2 & 3). The geofabric <br />for the north sediment trap at the site entrance needs to be repaired to prevent runoff from <br />getting under the fabric and allowing sediment to escape the site (see Pic. 4). The fabric ends <br />should be 'buried along the sides and bottom of the traps. All pipes, ditches and sediment traps <br />should be inspected and repaired as necessary, especially after storm events. <br />The drainage for the overall site is functioning well and is generally in good shape. There were <br />no items noted during the inspection which required attention. The drainage features have <br />been constructed and are operating as stated in the drainage plan submitted to the Division of <br />Minerals and Geology. <br />P.O. Box 1163 28 South Washington Street Cortex, Colorado 81321 <br />970.565.7483 stonerengineer@frontier.net 970.565.7704 <br />