_INSPECTION - C1981012 (48) - Laserfiche WebLink

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East Side of the Development Waste Pile The East Side of the Development Waste Pile (DWP) is a small vegetated slope of about Y2 acre on the east side of the DWP above a clean water diversion ditch near the entrance to the mine site. A sediment demonstration in the form of modeling was found in Exhibit 19, part 5 Miscellaneous Drainage Supplement (TR-35). The area is also mentioned in the Stormwater Management Plan in Exhibit 22 of the approved permit under Part 2, item #1 and in the table included in Part 5, item b. The area is shown as an SAE on Map 11, East Portal — Facilities, 4/22/2011 of the approved PAP. This moderate slope is situated immediately above a clean water diversion that diverts flows from the north side of Highway 12, past the DWP, to the Purgatoire River. It was found well vegetated with grasses and forbs along with some mature shrubs. No significant erosion or evidence of instability was noted. Apache Canyon Shaft Lower and Apache Canyon Shaft Upper These two ventilation shaft areas are located in Apache Canyon south of the main mine facility area. Both are ventilation shafts that are completed in the Allen coal seam. The upper shaft is in use, covered with a steel grate behind a locked fence. The lower shaft is currently capped and not in use. The total area of disturbance associated with both shafts is about 2 acres. A sediment demonstration in the form of modeling was found in Exhibit 19, part 5 Miscellaneous Drainage Supplement as attachment C of revised materials submitted with TR-23 in response to Ten-Day Notice 91-02-370-003. The areas are also mentioned in the Stormwater Management Plan(SWMP) in Exhibit 22 of the approved permit under Part 2, item #6 and item #7 and in the table included in Part 5, item b. The areas are shown on Map 11A, Apache Canyon Shafts 3/28/2009 of the approved PAP, although the map does not clearly indicate that each area is an SAE. The upper shaft area is in use and fenced. The access road continues through the shaft area. The fill slope below the pad is well vegetated. The steep cut slope above the pad is poorly vegetated. The SWMP calls for vegetation to control sedimentation as does the correspondence submitted with TR-23. The lower shaft area (see photographs) is a capped shaft surrounded by a revegetated area. No sign or erosion or sediment generation from the lower shaft area was noted. Fencing should be established at the lower shaft in accordance with the approved PAP. The operator should consider additional methods at the upper shaft site on the cut slope to control erosion including revegetation, mulch, or erosion control matting. Coal Loadout The coal loadout is a new facility recently approved under Permit Revision No. 3 (PR-03), located on the west side of Trinidad. The current plan is for the loadout to be used until the rail spur can be re-established to the mine site within the next two years. The entire 10.5 acre area was previously disturbed as a rail yard. The area is shown on Figure 1 and Figure 2 of Exhibit 40 of the approved PAP, although it is not clearly indicated as an SAE. Text narrative on page 6 of Exhibit 40 discusses the use of berms to control both runoff from the disturbed area and run-on to the disturbance from the north. Stormwater runoff from a 10-year 24-hour storm will be held entirely in 3 sumps, shown on Figure 2. Field inspection revealed no clear establishment or continuity of berms, although berming was present in various locations along the southern perimeter. The southern rail line grade acts as a barrier to any stormwater runoff from the north, effectively preventing that runoff from leaving the site. However, the south side of the southern rail line would require berms and sumps to control runoff. The loadout remains inactive as no coal had been hauled to the site at the time of the inspection. The operator was 7