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Location: 8 km SE from Dahlgren, Illinois, United States
18033 County Rd 500 EDahlgrenIllinois, United States62828
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Hamilton extracts coal from the Herrin seam. The seam lies between 900 and 1100 feet deep and dips gently to the east/southeast. The seam varies in thickness over the reserve area from 5 feet to 9 feet. On a 1.60 float, dry basis, the Herrin seam averages 8.0% ash, 2.8% sulfur, and 13,420 btu/lb. The Herrin seam mineral deposit type (coal rank) is a high volatile bituminous B/C coal.The Springfield seam underlies the Herrin seam by approximately 100 feet. This seam is extensively mined throughout the Illinois basin. On a 1.60 float, dry basis, the Springfield seam averages 8.1% ash, 1.7% sulfur, and 13,700 btu/lb. The Springfield seam mineral deposit type (coal rank) is a high volatile bituminous B/C coal.The primary coal-bearing strata is of Carboniferous age in the Pennsylvanian system.The geologic model developed to characterize the resource/reserve is a bedded sedimentary deposit model. This is generally described as a continuous, non-complex, typical cyclothem sequence that follows a bedded sedimentary sequence. The geology, including coal thickness and extent has been and continues to be verified by an extensive drilling program.
