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ti Colowyo Complete Oversight Inspection Colorado Division of Reclamation, Mining and Safety(DRMS) Permit ID # C-1981-019 June 15 - 17, 2010 7:30—4:00 Participants: Jim Stark, DRMS Christine Belka, Office of Surface Mining (OSM) badge ID #182 . Ryan Pawlowski, Rio Tinto Jennifer Sekulski-Barton, Rio Tinto Weather conditions: warm (80's), clear, dry This was a.complete oversight inspection as well as an evaluation year 2010 (EY 10) special focus evaluation of signs and markers at the Colowyo mine. . Operations: The 103 dragline was removing overburden from the B seam in West Pit while the 102 dragline was building a ramp to walk the 103 down later. Truck shovel operations were being conducted in the South Taylor Pit(excavator loading trucks with B1 material, loader loading E2). Truck shovel material is being used to backfill Section 16. Roads were being graded and watered throughout our inspection. Rock crusher was operating—making road material for use on site. Primary coal crusher was operating—crushes coal to 8"minus (secondary crushes to 2"minus). West Taylor Fill area B-B' underdrain connects to the A-A' underdrain which leads to the pond (West Taylor#11). The A-A' underdrain has been constructed and covered with a geotextile material but has not been filled over yet. The upper portion of his fill is approved to receive 1 OM yds3 of material. A pending technical revision could allow an additional 1 OM yds3 of material to be placed here temporarily(still under DRMS review). Streeter Fill is stable and well-vegetated. Reclamation: The mine is preparing two large bond release packages encompassing around 1,000 acres for a mixture of Phase I, II, and III bond release. Reclaimed areas were inspected for compliance with bond release requirements but this was not the bond release inspection. Pending complete application packages, the official bond release inspection will be conducted in August or September of this year. Several weed species were observed including thistle,houndstongue and cheat grass. Weeds were being sprayed at the time of inspection(one man spends an average of two weeks each spring spraying weeds from a 4-wheeler unit or using a backpack sprayer in steep areas). A large patch of cheat grass was discussed. This has been an area of concern. Mine personnel believe desirable species may be choking out cheat grass in some areas. Mr. Stark is concerned that the invasive species is gaining a foothold. It was agreed that the grass will be sprayed.