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William A. Bear <br />Page 2 of 4 <br />August 15, 2014 <br />Commencing with issuance of TR -77, BRL must conduct a survey to <br />determine the volume of coverfill material in the stockpiles associated with <br />Gob Piles #1, #2, #3, and #4 on at least a quarterly basis. A report <br />summarizing the survey shall be submitted within 30 days of the survey, <br />and must include a statement of whether the volume of available material <br />is sufficient to meet the requirements of Rule 4.10.4(5) and the material <br />balance in the currently approved permit application package. <br />The last survey data provided to the Division was based on a survey <br />conducted in April 2014. Division observations of the cover material <br />stockpiles indicate that during May and June of 2014, material was removed <br />from stockpiles and placed on Gob Pile #4 and used for drying purposes on <br />Gob Pile #3. Please submit a summary of the required survey data indicating <br />the volume of cover material currently available for Gob Piles #1, #2, #3, and <br />#4. <br />3. Compaction Testing was conducted in the past by Buckhorn Geotech. It is the <br />Division's understanding that Buckhorn collected a gob sample with each field test, <br />and transported it to their lab, where the Maximum Dry Density (MDD) and <br />Optimum Moisture Content (OMC) for that particular sample were established. <br />Thus, for each compaction test location, field results were compared with custom <br />results obtained in the lab, and the percent compaction was determined. <br />The values below are derived from Buckhorn's test results, generated between <br />January 2012 and March 2014, and depicted in the graph which follows: <br />Statistical Average (Mean): 100.0 pcf <br />Maximum MDD to date: 117.0 pcf (Test No. 33 on 05- Mar -2014) <br />Minimum MDD to date: 82.7 pcf (Test No. 593 on 26- Apr -2012) <br />