_INSPECTION - C1994082 (40) - Laserfiche WebLink

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September 20,2010 C-1994-082/Yoast Mine DTM FISH and WILDLIFE—Rule 4.18: A small covey of sharptailed grouse was flushed from the edge of the reclamation to the north of Channel YPM-6- 1 on 9/20. Two mule deer does and three fawns were observed near the surge pond structure along YPM-8, on the same afternoon. HYDROLOGIC BALANCE -Rule 4.05 ❑Drainage Control 4.05.1,4.05.2,4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, 4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; Drainage—Acid and Toxic Materials 4.05.8; Impoundments 4.05.6,4.05.9; Stream Buffer Zones 4.05.18: Sedimentation and drainage control structures were in general intact and functional. In the small area exemption location along the ridgeline disturbance in the vicinity of Topsoil Stockpile"L", a number of the straw wattle installations need to be re-set or replaced,in locations where there were undercut by flow or displaced to accommodate work at the site(see Figure 13-12.4-1 "Conceptual SAE Drainage Control Plan"). The following observations were made at sedimentation ponds during the course of the inspection: -Pond 010 was discharging minor flow through the weep hole in primary riser when observed on 9/20/10, at 6:20 pm. Discharge was clear,embankment appeared to be stable. -Pond 012 was observed at 1 pm, on 9/23. Discharging clear flow through weep holes on primary riser. Embankment stable. -Pond 012A observed at 1:30 pm,on 9/23. Water level approximately 10 feet below top of riser; no discharge. Embankment appeared stable. -Pond 013 observed at 1:45 pm,on 9/23; water level 2' below top of riser,no discharge. Embankment stable. -Pond 014 observed at 2 pm on 9/23; water level 3' below top of riser; no discharge. -Pond 011 A was observed the morning of 9/24. Water level was at least 5' below the top of riser; no discharge. Embankment stable. -Pond 011 was also observed the morning of 9/24. Water level was approximately 8' below the primary discharge level; no discharge. Embankment stable. A small patch of the noxious weed dalmation toadflax had been noted on the Pond 011 embankment in 2009. No toadflax plants were observed on the embankment during this inspection; however, a number of dalmation toadflax were observed scattered across the lower 1/3 of the sagebrush slope,on the north side of the pond, and these weeds will need to be sprayed. Also, some black fabric channel liner material had been pulled out of the pond inlet channel during previous maintenance work. The old liner material needs to be removed and properly disposed of. ROADS—Rule 4.03 ❑Construction 4.03.1(3)/4.03.2(3) ❑Drainage 4.03.1(4)/4.03.2(4) ❑Surfacing and Maintenance4.03.1(5)and(6)/4.03.2(5) and(6) Number of Partial Inspection this Fiscal Year: 2 Number of Complete Inspections this Fiscal Year: 1 Page 4 of 13