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arthWest Colorado Consultants, Ind <br /> entechnical I Environmental lEngineering,-Materials T'estIng <br /> October 9,2019 <br /> Twontyt i le Coal Company <br /> 29515 RCR 427 <br /> Oak Creel,CO 80467 <br /> Attn-. Miranda Kawcak <br /> Job Number:99-3983 <br /> Subject: Quarterly Observation Report,Refuse <br /> Pile,Foidel Creek Mine,Routt County,Colorado. <br /> III irnda, <br /> As requested, MCC, Inc, NWCC) has prepared this report outlining our observations made during the <br /> third quarter of 2019 at the Refuse Pile located at Twentymile Coal Company's TCQ Foidel Creek nine <br /> in Routt County, Colorado. During this quarter, Timothy Travis of NWCC visited the project site on <br /> September 30, 2019 to provide the quarterly inspection/observations of the Refuse Pile. <br /> At the time of our site visit on September 30, 2019, NWCC completed a site inspection of the existing <br /> refuse pile. Based on our observations made during this visit, it appeared that the contractor was presently <br /> stockpiling and compacting refuse coal in the new Expansion Area. At the time of our site visit,the refuse <br /> coal had been placed and compacted to are elevation rear the third bench situated along the east side of the <br /> stockpile. <br /> 1n addition, a representative of NWCC visited the refuse pile on September 27, 2019 to conduct <br /> compaction testing in the new Expansion Area of the defuse pile. Three compaction tests #5 D to 4582 <br /> were taken in Expansion Area during this quarter. All of the tests taken during this quarter- met the <br /> minimum compaction requirement of 0% of the ina iinuin standard Proctor density, Copies of the <br /> compaction test results and the daily field reports are attached. It should be noted that the abbreviations <br /> given in the Nucleon Density Test Results (Proctor Data) are as follows: l aximurn DD = Maximum Dry <br /> Density and OINK Optimum Moisture Content, Both of these values have been determined in accordance <br /> with AST11 D698. <br /> The internal roadways in the new expansion area of the pile are in good condition. The upper haul road to <br /> Areas 2,3 and 4 of the refuse pile was accessible at the time of our site visit and in goad condition. <br /> seepage area at the toe of the northeast end of the refuse pile expansion area, approximately 30 feet <br /> northwest of the outlet of the underdrain, developed in fall 2014. At the time of our observations, the <br /> seepage was surfacing at the toe of the slope and flawing into the drainage from the undrain outlet then into <br /> the existing pond east of the Defuse Pile Expansion Area. The discharge was clear, with no evidence of <br /> 2580 Copper Midge Drive• Steamboat Springs,CO80487 <br />