2013-04-18_PERMIT FILE - C2009087A

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RULE 2 - PERMITS Surface Water Bodies, Water Supply Intakes, Wells, Borings, Waste Disposal Areas, and Water and Air Pollution Control Facilities • In addition to the flowing treams listed above, the following surface impoundments are located g g p within the PSCM permit area, and listed in sequence from west to east: • Nofstger Zeigler Reservoir, on Armand Draw • Nofstger Reservoir, on the unnamed tributary to Scotchman's Gulch • Pond 003 (NPDES3, Shop Reservoir), east of Grassy Creek below Little Grassy Creek confluence • Pond 002 (NPDES2, Wadge Impoundment), on Little Grassy Creek • Spring Creek Stock Pond, on an unnamed ephemeral tributary to Little Grassy Creek • Pecoco Pond (alternatively spelled Peacoco Pond), on an unnamed ephemeral tributary to Little Grassy Creek • Pond 004, (NPDES4) on Cow Camp Creek Ponds 002, 003, 004, and Pecoco are approved post- mining permanent impoundments for the Seneca II Mine, and will remain in service. Outflow hydrographs for Ponds 002, 003, and 004 are shown in Figure 2.04.7 -F15, above. Flow measaurements collected at spoil spring SSSPG5 represent discharge from Pecoco. Pecoco will receive additional stormwater runoff from a larger watershed due to design changes to drainage channels east and south of the proposed mine portal area, and a small portion of the proposed topsoil stockpile immediately south of Pecoco. Pond 002 will receive treated runoff from the proposed PSCM portal sumps and coal stockpile sumps, and . stormwater from surface disturbances east and north of the PSCM facilities. The other impoundments will not be impacted by mining activities during the initial permit term. Groundwater monitoring and water supply wells were both discussed earlier in this section, and are shown on Map 2.04.7 -M2, Surface Diversions, Reservoirs, and Water Supply Wells. Boreholes are shown on Map 2.04.6 -M2, Boreholes and Stratigraphic Cross Sections, and discussed in Section 2.04.6, Geology Description. All proposed PSCM waste disposal facilities including spoil areas, and coal and non -coal waste disposal sites, and all water pollution control installations in the mine permit and adjacent areas, are shown on Map 2.05.3 -M4, Drainage and Sediment Control Plan as presented and discussed in the Operations Plan Section (2.05.3). Existing reclaimed spoil areas from the adjacent Seneca II Mine are shown on Map 2.04.6 -M1, Surface Geology. There are no air pollution control facilities or municipal water supply intakes within the PSCM permit area and adjacent area. Oil and gas production facilities are shown on Map 2.03.4 -M3, Oil, Gas, and Other Minerals Ownership. Surface Water Ouality Surface water quality for the PSCM and adjacent areas is variable, depending on the size and characteristics of the contributing watershed, seasonal runoff factors, the influence of the adjacent reclaimed Seneca II Mine, and the presence of surface impoundments. Water quality in intermittent streams is strongly related to the seasonal flow regime, while perennial drainages are somewhat less sensitive to seasonal variations. • Extensive surface water monitoring has been conducted for the previous mining operations adjacent to PSCM, Yoast and Seneca II Mines. The previously discussed Table 2.04.7 -T5 identifies the PSCM Permit App. 2.04 -70 6/15/09