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August 29, 2012 C- 1981 -038 /Bowie No. 1 Mine MPB <br />Inspection Topic Summary <br />NOTE: Y= Inspected N =Not Inspected R °Cornments Noted V= Violation Issued NA =Not Applicable <br />N -Air Resource Protection <br />N -Availability of Records <br />N - Backfill & Grading <br />NA - Excess Spoil and Dev. Waste <br />NA - Explosives <br />N - Fish & Wildlife <br />R - Hydrologic Balance <br />N - Gen. Compliance With Mine Plan <br />NA -Other <br />N - Processing Waste <br />N -Roads <br />N - Reclamation Success <br />N - Revegetation <br />N -Subsidence <br />NA - Slides and Other Damage <br />N - Support Facilities On -site <br />N -Signs and Markers <br />NA - Support Facilities Not On -site <br />NA - Special Categories Of Mining <br />N - Topsoil <br />COMMENTS <br />This was a partial inspection of the Bowie No. 1 Mine conducted by Mike Boulay of the DRMS Grand Junction <br />Field Office on August 29, 2012. I was accompanied by Gary Harding of Bowie Resources during the entire <br />inspection. Weather conditions were hot, clear and dry. Ground conditions were dry at the time of inspection. <br />HYDROLOGIC BALANCE - Rule 4.05 <br />Drainage Control 4.05.1, 4.05.2, 4.053; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, 4.05.10; <br />Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; <br />Drainage — Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />The bin wall ponds 1, 2, 3, and 4 and the steep riprap drainage Ditch B-3 were viewed from the upper slope of the <br />East Mine. The ponds were dry and appeared stable and functional. Ditch B -3 is a riprap lined vegetated channel <br />that runs down the length of the steep backfill and graded slopes of the East Mine. The upper segment of Ditch B- <br />3 shows signs of erosion. There are gaps between rocks and sediment accumulated in the ditch between rocks. <br />Vegetative cover is somewhat sparse on the upper slope of the East Mine. Overall though the backfilled and <br />graded slopes were stable with no significant signs of erosion or instability. The bin wall ponds as viewed from <br />atop the East Mine are shown in attached Photograph No. 1 at the end of this inspection report. The upper <br />segment of Ditch B -3 is shown in Photo No. 2. <br />The lower end of Ditch B-3 was recently repaired because a section of the ditch was not adequately annored to <br />contain flow in the channel. During high flow events water was overtopping the channel and eroding out the base <br />of a Scrub Oak Tree and causing additional damage below. The operator mobilized equipment into this location <br />and placed large riprap below the point where the water flow overtopped the channel. The channel takes a sharp <br />turn at this point and this is where the erosion was occurring. The channel then curves again in a short distance to <br />the south and this is the area where most of the large riprap was recently placed. Based on my inspection, it <br />appears that the channel repair will not be adequate to contain runoff during significant future precipitation events. <br />At a minimum, additional riprap will be needed at the point where the water was originally flowing out of the <br />channel and the erosion was occurring (see Photo No. 3). It may also be appropriate to lessen the sinuosity of the <br />Number of Partial Inspection this Fiscal Year: 2 <br />Number of Complete Inspections this Fiscal Year: 0 <br />Page 2 of 6 <br />