PERMFILE49948 - Laserfiche WebLink

Home Browse Search

S~iaz - 2.04.7 • CJ matter on a moisture/ash free basis (C - 41.3); and Percent fixed carbon on a moisture/ash free basis (C - 58.7). -~B Horizon (Somerset) - The B coal horizon occurs approximately 120 feet above the Rollins Sandstone Member to the west in the vicinity of Hubbard and Terror Geeks but is only 20 to 50 feet above the Rollins unit to the east in the Somerset and Hawk's Nest Geek area. In the eastern portion of the mine pemut area (Somerset/ Hawk's Nest Geek area), the B horizon consisss of a single coal seam which may attain a maximum thickness of up to 24 feet. The upper portion of this seam u generally of better quality and was the primarycoal source for the Somerset Mme. To the west of the old Somerset Mme, the B seam spliss into two seams, with separation between the two splits reaching 45 feet at the west edge of the mine property. The lower B-1 coal seam ranges up to approximately 15 feet thick, although an average of only approximately 9.6 feet of the seam is economically recoverable. The B-1 coal seam has been extensively mined at the Bowie Mme to the west of the mine permit area. The upper B-2 coal seam ranges up to approximately 21 feet in thickness with an average mineable thickness of approximately 14 feet. In the Terror Geek area, both the B-1 and B-2 coal seams are cut by igneous intrusive sills which have replaced much of the coal and metamorphosed the remainder to natural coke. Estimated coal quality parameters are; Percent ash (B-1 - 6.5, B-2 - 8.6 (includes un-sampled partings at 100%)); Percent volatile matter on a moisture/ash free basis (B-1 - 39.0, B-2 - 41.2); and Percent fixed carbon / on a moisture/ash Free base (B-1 - 61.0, B-2 - 58.8). J/ A Horizon (Old King) - The A coal horizon occurs urunediately above the Rollins Sandstone Member and consists of up to three delineated coal seams. The A coal seams are generally discontinuous over the mine permit area and are relatively thin, with a maximum total coal thickness, based on exploration drilling results, of approximately 4.8 feet. The A coal seam has been mined, in conjunction with the B coal seam, at the Old King Mme. Coal quality is generally poor, with numerous splits and partings resulting in relatively high ash and sulfur values and low BTU values. Coal Characteristics -General coal seam occurrence and quality characteristia are described in the previous discussion of coal seam geology and illustrated by the associated maps. Coal seam characteristics which would be of concern relative to suitability of mine development waste or coal refuse relate to sulfur content, which is consistently low for all coal searru. Sulfur values vary both within and between individual coal seams but can generally be represented by the following typical coal analysis: Analysis Parameter Pyritic Sulftrr Sulfate Sulfur Organic Sulfur Total Sulfur 2.04.7 -Hydrology Description As Received Basis Dry Basis 0.11 0.11 0.00 0.00 0.42 0.43 0.53 0.54 This section of the pemut application describes site-specific hydrologic conditions in the mine pemut and adjacent areas as a basis for characterization of mining conditions, evaluation of potential mining- related impacts, and development of any appropriate plaru for protection of hydrologic resources and control or mitigation of impacts related to site hydrology. The information presented in this section u based on reseazch of available published reports and documents; contacss with Federal, State, and local agencies; hydrologic information collected during exploration drilling prograrrts; mine inflow studies; and the resulss of ongoing hydrologic monitoring and related sampling and analyses. Hydrologic monitoring locations and elevations, surface and ground water features, water supply intakes, ditches, and wells are shown on the Regional Geology/Hydrology Map (Map 2.04-M2) and Ground Water and Surface Water Hydrology Maps, (Maps 2.04-M5 and 2.04-M6).~Copies of PR04 2.04-18 Revised August 2000