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May 17, 2011 C- 1994- 0821Yoast Mine SLB <br />was also a large gully on the north side of the same topsoil stockpile that was in need of repair. <br />YPM -8 and YPM -1 I were in excellent condition. YPM -5 -1 was observed from the hill above the Pond 013 slide. <br />It appeared that heavy flows had gone through the drainage and maintenance might be warranted. No flow had <br />breached the channel, but it looked like downcutting had occurred. <br />ROADS — Rule 4.03 <br />❑ Construction 4.03.1(3)14.03.2(3) <br />❑Drainage 4.03.1(4)14.03.2(4) <br />-J Surfacing and Maintenance4.03.1(5) and (6)14.03.2(5) and (6) <br />,Reclamation 4.03.1(7)14.03.2(7): <br />The road surface of Haul Roads A and B was dry and in good condition. Postmining drainage channels along the <br />east side of Haul Road B were in good condition and functioning as designed. <br />Light Use Road LU -2, which runs up into the North Pit, needed to be regraded where a gully had formed <br />down the road centerline near Culvert YB -6. <br />The two culverts at Culvert YA -6 that convey Scotchman's Gulch under Haul Road A were both flowing. The <br />outlet end of the culvert was downcutting at the culvert area and extending beyond the permit boundary. The <br />downcutting was approximately 6' deep, and extended outward approximately 3' on each side of the culverts. <br />Material has eroded beneath the culverts as well, resulting in road fill material being washed into Scotchman's <br />Gulch. NOV CV2011 -002, was issued for failure to ensure that "construction, maintenance, and post - mining <br />conditions of haul roads into and across the site of operations will control or prevent erosion and siltation, <br />pollution of air or water, and damage to public or private property ", as required by Rule 4.03.1(1)(a), and failure to <br />ensure that haul roads do not cause "additional contributions of suspended solids to streamflow or to runoff <br />outside the permit area" as required by Rule 4.03.1(1)(b). The operator will need to regrade the area and <br />install rip rap at the outlet of both culverts, as specified in the Notice of Violation. <br />Culvert YB -3 was in need of maintenance at the outlet side, where it was partially clogged. The outlet of <br />Culvert YA -4A needed to be cleaned, and the rip rap at YA -3 needed to be enhanced. <br />RE VEGETATION —Rule 4.15 <br />Vegetative Cover; Timing: <br />The soils were saturated, the temperature was unusually cool and large patches of snow were still present which is <br />unusual for this time of year making the vegetation late sprouting. The early season forb species were just starting <br />to flower. Some perennial grasses and fortis were starting to sprout and the shrubs were at bud- break. Some of <br />the species seen sprouting in the reclaimed areas were Western blue flax, alfalfa, western spring beauty, prairie <br />onion and chokecherry. Within the enclosures golden current, western serviceberry, narrow leaf cottonwood and <br />coyote willow were breaking buds. A small patch of dalmation toadflax was getting established on the north <br />side of Pond 11. This should be sprayed this season. <br />SLIDES and DAMAGE - Rule 4.12: <br />Number of Partial Inspection this Fiscal Year: 9 <br />Number of Complete Inspections this Fiscal Year: 3 <br />Page 3 of 15 <br />