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DOCUMENTATION AND OTHER OBSERVATIONS <br />Fall conditions prevail with the surface dry.. Overall the site is in good condition. <br />Maintenance Required: <br />Temporary sediment from ditch and sump clean-out has been placed within a bermed area on the west end of the <br />pile. This sediment needs to be turned and air dried in preparation for transport to the RDA. <br />REFUSE DISPOSAL AREA (RDA) <br />GENERAL DESCRIPTION OR REFERENCE TO SITE PLAN: <br />The Primary Refuse Disposal Area is located north of State Highway 12 and the Middle Fork of the <br />Purgatoire river. Refuse is transported by conveyor belt to the RDA from the coal preparation plant <br />located south of the river. The plant operated intermittantly during 2012 with temporary cessation of <br />operations announced effective July 11, 2012. The mine briefly returned to production May -September, <br />2014; but returned to temporary cessation of mining in September 2014. Since then the mine has <br />intermittently transported development waste from temporary storage piles to the RDA <br />ACTIVITY DURING INSPECTION: <br />_Removal of Topsoil and Organic Matter <br />Placement of Under -drains <br />_Installation of Surface Drainage System <br />_Construction of Fill <br />—Placement of Topsoil <br />_Seeding <br />X Other Facility is idle at this time <br />Drainage: (Discussion of springs. seeps, overland and channel flow, underdrain construction <br />and/or discharge, integrity of 100 -year 24-hour drainage structures, and evidence of positive <br />drainage). <br />Observation of Fill Construction: (Description of material, compaction, lift thicknesses, slopes, and <br />construction methods) <br />Refuse is placed in 1-2 foot lifts, allowed to dry and then compacted. Periodically CTL -Thompson, a <br />geotechnical engineering firm, evaluates refuse compaction. The permit requires and testing has <br />demonstrated that the operation have achieved in excess of the required 90% compaction. <br />Indications of Potential Failure or Instability: <br />None observed. <br />Threat to Human Life or Property: <br />Page 4 <br />