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Bill Bear <br />Page 2 <br />3/26/2017 <br />Associates on September 21, 2016. The report states that there were no signs of instability, <br />structural weakness or hazardous conditions at the piles. The observations made by J.E. Stover <br />and Associates reflects the observations made by the Division during on-site inspections. A total <br />of 29,915 tons of waste coal were placed on Gob Pile #2 and Gob Pile #3 during the Yd Quarter. <br />It is estimated that 50% was distributed to each pile. During the 3°d quarter 32 compaction tests <br />were performed on Gob Pile #2. There were no compaction tests conducted on Gob Pile #3. <br />Compaction tests were performed on June 20, 2016. All of the compaction tests were above the <br />90% maximum dry density standard (Rule 4.10.1(3)(b)). There are three inclinometers installed <br />in the lowermost bench of Gob Pile #2. Measurements of these inclinometers are taken <br />quarterly. The 3`d quarter results indicate that no significant movement occurred. In the 2"d <br />quarter report, it was noted that deflection occurred at BG05-05. The 3'd quarter report states <br />that the movement detected in the 2nd quarter was either reversed or had stabilized in the 3`d <br />quarter. There are 5 vibrating wire piezometers (VWP) installed at Gob Pile #2 and 5 installed at <br />Gob Pile #3. VWP-06 and VWP-08 both showed a slight decrease in pore pressure since the 2"d <br />quarter. <br />A letter sent to Bowie Resources, LLC (BRL) on April 10, 2014 from the Division directed BRL <br />to increase the monitoring frequency from quarterly to monthly. In a letter dated April 11, 2014, <br />BRL committed to increasing the monitoring frequency. Monthly monitoring was conducted <br />through October of 2014 and an additional; quarterly reading was taken on January 6, 2015. On <br />February 10, 2015 the Division approved BRL to monitor once per quarter through the 1St quarter <br />of 2016. The Division will continue to review the quarterly data and determine if BRL should <br />return to monthly monitoring of VWP-06 and VWP-08. <br />This concludes the Division's review of the 3rd Quarter 2016 Pond Inspection Report and the <br />3rd Quarter 2016 Coal Waste Pile & Instrument Monitoring Report. If you have any questions, <br />feel free to contact me. <br />Sincerely, <br />!�Y <br />Clayton Wein <br />Environmental Protection Specialist <br />clayton.wein@state.co.us <br />oF•coco <br />555 Street Address, Room 555, Denver, Co 55555-5555 P 555.555.5555 Ln <br />1876 <br />