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August 26, 2010 C-1991-078/Hamilton Mine MLT <br />Inspection Topic Summary <br />NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable <br />NA - Air Resource Protection R - Roads <br />N - Availability of Records Y - Reclamation Success <br />NA - Backfill & Grading R - Revegetation <br />NA - Excess Spoil and Dev. Waste NA - Subsidence <br />NA - Explosives NA - Slides and Other Damage <br />Y - Fish & Wildlife NA - Support Facilities On-site <br />R - Hydrologic Balance Y -Signs and Markers <br />N - Gen. Compliance With Mine Plan NA - Support Facilities Not On-site <br />N -Other NA - Special Categories Of Mining <br />NA - Processing Waste Y -Topsoil <br />COMMENTS <br />HYDROLOGIC BALANCE -Rule 4.05 <br />Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, <br />4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water <br />Monitoring 4.05.13; Drainage - Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream <br />Buffer Zones 4.05.18: <br />Evidence that a recent, significant precipitation event had occurred in the area was observed in places <br />along SH 141 south of the turnoff to the Hamilton Mine. Mud had overflowed from the roadside ditches <br />and onto the highway. Similar conditions were noted on the county road west of the turnoff to the Broad <br />Canyon landfill, south of the permit area. This gravel county road crosses a series of natural gullies that <br />carry flow northward from a ridgeline located to the south. Culverts in place beneath the roadway at <br />each gully crossing appeared to have become clogged with sediment and debris, which then caused the <br />flow to back up and overtop the roadway in several spots. Thankfully, these conditions were not <br />duplicated within the mine permit area. All culverts were checked, and inlet and outlet ends were found <br />to be clear. The temporary diversion ditch at the northwestern corner of Mining Area No. 3 was <br />reasonably well vegetated, with no apparent erosion or sedimentation. There was some evidence of <br />some minor erosion having occurred (possibly due to the recent storm event) in the northern roadside <br />ditch of the haul road to Mining Area No. 3. <br />Sedimentation Pond A was dry, but desiccation cracks on the pond floor indicated that minor <br />ponding of water had occurred sometime in recent weeks. Water was being stored in Sedimentation <br />Pond B for the first time this season. Approximately two-thirds of the pond floor was submerged. <br />ROADS - Rule 4.03 <br />Construction 4.03.1(3)/4.03.2(3) <br />Drainage 4.03.1(4)/4.03.2(4) <br />Surfacing and Maintenance4.03.1(5) and (6)/4.03.2(5) and (6) <br />Reclamation 4.03.1(7)/4.03.2(7): <br />Roads within the permit area were predominantly dry, with a few damp spots. On the steeper <br />s of the road to Mining Area No. 3, the recent storm event appeared to have been heavy enough to <br />Number of Partial Inspection this Fiscal Year: 1 <br />Number of Complete Inspections this Fiscal Year: 1 <br />Page 2 of 7