2017-12-29_REPORT - C1981035 (3)

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V. COLORADO Division of Reclamation, Mining and Safety Department of Natural Resources 1313 Sherman Street, Room 215 Denver, CO 80203 Decmeber 29, 2017 Interofce Memo King Coal Mne (Permit No. C-1981-035) 2017 Fourth Quarter Waste Pile/Embankment Inspection Reports Review M. I have reviewed the 2017 Fourth Quarter Waste Pile/Embankment Inspection Reports (Reports) for the King Coal Mine and have found them in compliance with the following Rules: • 4.09. l (11)(a) — The coal mine waste bank was inspected by a qualified professional engineer during the fourth quarter. Ryan Griglak, P.E., of Stoner Engineering & Surveying, inspected the waste pile on behalf of GCC Energy, LLC. The inspections occurred during the fourth quarter of 2017. • 4.09. l(11)(b) — The inspection occurred on December 19, 2017 and the reportwas dated December 22, 2017. There is no visible recieved time stamp with the report but since the time of my review request was within two weeks of the inspection, it can be assumed it was received by the Division within the required time. • 4.09. l(11)(c) — This rule is not applicable during this phase of waste pile construction unless being constructed in stages. • 4.10.2(1) — Refer to Rule 4.09.1(11) (a) of this memo. • 4.10.2(2)(a) — Refer to Rule 4.09. 1 (1 1)(b) of this memo. The Division does not require additional inspection frequency for the King Coal Mine waste pile. • 4.10.2(2)(b) — King Coal Mine is required to submit compaction results to the Division at least once every two years. Compaction results were not submitted with this inspection report. The last compaction reportreceived by the Division was in 2017, thus no compaction results are necessary at this time. • 4.10.2(2)(c) — Visible evaluation of the waste pile was documented in the Report. No signs of instability or potential hazards to life and property were noted in the Report. • 4.10.2(2)(d) — Copies of the inspection findings shall be maintained at the mine site. As you mentioned in your previous review in the 2017 third quarter review, additional discussion regarding the underdrain would be helpful in the Division's review. However, with the underdrain construction completed and fully buried with refuse, discussion regarding the underdrain is limited to observed water expression through the outlet. That being said, in the Report, Mr. Ryan Griglak notes water/ice build up along the outlet of the underdrain due to lack of grade in that area which has the potential to back up subsurface water within the pile. I believe this is an item that should be addressed under maintenance to ensure proper flow is allowed from the underdrain outlet. flF'C-0 H 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining. state. co. us I John W. Hickenlooper, Governor I Robert W. Randall, Executive Director I Virginia Brannon, Director * r 1876 4