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jtoner E_ngineering & Surveying <br />Engineering, Testing & Surveying <br />Date: October 16, 2012 <br />To: Tom Bird <br />Manager, Coal Services <br />GCC Energy, LLC <br />6473 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 />Re: King Coal I — Quarterly Water Quality Improvements Inspection <br />On September 29, 2012, 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 />The King I Mine consists of two (2) storage ponds (East Pond and West Pond) to provide the <br />necessary storage to contain the 100 -year storm event. All "contaminated" runoff from the site <br />is routed into either the East or West ponds. Offsite runoff (clean) is routed along the outside <br />of the site via channels which are in good condition. Finish grading and reinstallation of <br />sedimentation gages needs to be completed (see Pic. 1 and Pic. 2) where excess sediment was <br />removed from the detention ponds to maintain the storage volume necessary to store runoff <br />from the 100 -year storm event. The sediment was removed from the ponds on 9/18/12. <br />The outlet pipe between the East and West Ponds was damaged at the outlet during the <br />removal of the excess sediment and was cut a few feet from the face of the bank (see Pic. 3). <br />The area of the pipe was not reduced as a result of the damage. It is recommended that the <br />damaged pipe be extended so as to discharge runoff onto the finished slope rather than a few <br />feet behind the finished slope. The outlet pipe at the north west end of the East Pond also <br />needs to be cleaned out as a result of the removal of the excess sediment from the ponds. <br />P.O. Box 1163 28 South Washington Street Cortez, Colorado 81321 <br />-1�_ 1 970.565.7483 stonerengineer@frontier.net Frix 970.565.7704 <br />