_INSPECTION - C1981010 (3) - Laserfiche WebLink

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October 4, 2012 C-1981-010/Trapper Mine JLE steep sections of the re-established drainages such as observed in East Pyeatt, Oak and the northern portion of the drainage to the West Flume 41 pond,these practices have not proven to stabilize the drainages over the long term. The Coal Rules and Regulations indicate that diversions or collection drains used to transport water into a water- treatment facility and ephemeral streams that drain a watershed of less than one square mile above a diversion must"Be designed, located, constructed,maintained and used to minimize adverse impacts to the hydrologic balance and to be stable;" (Rule 4.05.3(1)(e)). After consideration,it appears East Pyeatt, Oak and the northern portion of the drainage to the West Flume 41 pond will need to be evaluated and an engineered design will need to be submitted to demonstrate how these channels will be stabilized in the future. Future re-established drainages may also need to be included and a design submitted to the Division. For example,the drainage in F-Pit that Trapper is currently constructing may need a detailed design to help prevent future instability issues. An additional adequacy review letter for the permit renewal (RN6)will be sent to Trapper and this issue will need to be addressed. GENERAL MINE PLAN COMPLANCE: The Molly Brown Dragline is working in the K-Dip pit and the Baby Doe was working in the K-Strike pit. The Queen Anne was down for maintenance. REVEGETATION—Rule 4.15; Vegetative Cover; Timing: Parcel K-A-I1 primarily consists of penny cress and Russian thistle. Grass has begun to germinate in some of the small rills throughout the parcel. Four wing salt brush is the primaiv shrub species that has begun to establish within this parcel. The upper face of the Horse Gulch Fill contained in parcel K-A-I1 has vein sparse vegetation established. Parcel Z-A-08 has a large amount of cheatgrass established as well as tumble mustard throughout the parcel. A Patch of thistle was noted within this parcel and its location marked with a Trimble YUMA GPS unit. An enclosed map depicts the location of this thistle patch. This area will need to be monitored during the next growing season and treated with the proper weed control methods. Parcel Z-A-07 has vein good perennial vegetation established. Veit/few weeds were observed within this parcel; however it is fairIv late in the season. SUPPORT FACILITIES -Rule 4.04: The East Panel Ready Line was observed and no problems were noted. The Facilities area was observed and no problems were noted. SIGNS AND MARKERS —Rule 4.02: The mine entrance sign from Highway 13 was observed,it contained the required information. The permit boundaiv was observed in several locations throughout the site. The boundaiv is marked with metal posts with a PVC pipe attached to the top of the posts with the letter"P"painted on the pipes. TOPSOIL—Rule 4.06; Removal 4.06.2, Substitute Materials 4.06.4(4); Storage and Protection 4.06.3; Redistribution 4.06.4: Number of Partial Inspection this Fiscal Year: 2 Number of Complete Inspections this Fiscal Year: 2 Page 5 of 10