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September 28, 2011 C -1994 -082 /Yoast Min e SLB <br /> <br /> <br />Number of Partial Inspection this Fiscal Year: 5 <br />Number of Complete Inspections this Fiscal Year: 1 <br /> <br /> Page 2 of 7 <br /> <br /> <br /> <br />Inspection Topic Summary <br />NOTE: Y =Inspected N =Not Inspecte d R =Comments Noted V =Violation Issued NA =Not Applicable <br />NA - 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 />Y - Gen. Complianc e With Mine Plan <br />NA - Other <br />NA - Processing Waste <br /> <br />N - Roads <br />N - Reclamation Success <br />R - Revegetation <br />NA - Subsidence <br />R - Slides and Other Damage <br />NA - Support Facilities On -site <br />N - Signs and Markers <br />NA - Support Facilities Not On -site <br />NA - Spec ial Categories Of Mining <br />N - Topsoil <br /> <br /> <br />COMMENTS <br /> <br />This was a partial inspection of the Seneca IIW Mine conducted by Susan Burgmaier of CDRMS. Jill Carlson of <br />the Colorado Geological Survey (CGS) participated in the inspection. CGS has assisted CDRMS in the <br />investigation and remediation of the landslides that have occurred on site this year. <br />Weather conditions at the site were sunny and warm; the area has been in a fairly dry pattern the last few weeks. <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 Wate r Monitoring 4.05.13; Surface Water Monitoring <br />4.05.13; Drainage – Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br /> Ponds 010, 012, 012A, 013, and 014 all held water. Stock Tank ST -1 was dry. The underdrains at Pond <br />012, through the slide area were both flowing. Standing water was observed at the toe of the Neck Pit slide area. <br /> <br />REVEGETATION – Rule 4.15 <br /> Vegetative Cover; Timing: <br /> About 100 sheep were grazing the reclamation in the vicinity of the Pond 013 sli de. <br /> <br />SLIDES and DAMAGE - Rule 4.12: <br /> The Pond 013 slide area was inspected. Grading of the scarp was complete but it had not been seeded. <br />Seeding of the scarp area needs to be done this fall. Toe drains had been excavated on the south end and through <br />the central area of the slide. The central area drain intersects channel YPM 4 -1 to carry flow from the slide into <br />Pond 013. The point where the new toe drain flows into YPM 4 -1 may require rip rap to ensure that the ditch does <br />not erode and that materia l from the toe is not transported downslope. Drainage YPM 4 was still blocked and <br />needed to be reworked to ensure that flow from the Pond 013 slide area will drain as quickly as possible to avoid <br />saturating the toe of the slide. When the channel is redef ined it should be armored to prevent sediment transport <br />and channel scouring. <br />