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Exhibit 81 <br />Mountain Coal Company, L.L.C. West Elk Mine <br />Coal Preparation Plant and Associated Coal Handling Facilities <br />Structural Data <br />Table of Proposed Conveyors <br />Conveyor Length (ft) Belt Width (in) Structure Width / Type Cover or Enclosure Type <br />TC-1 350 36 7'/ Open Steel Truss 3/ Hood Cover <br />PR-2 2,000 48 10'/ Open Steel Truss 3/ Hood Cover <br />P-6 200 36 8' / Open Steel Truss 3/ Hood Cover <br />PP-4 550 36 8' / Open Steel Truss 3/ Hood Cover <br />Table of Proposed Buildings and Structures <br />Item Length (ft) Width (ft) Height (ft) T e* <br />Preparation Plant 109 40 148 SSENC <br />Control/Lab Bldg. 50 40 30 SSENC <br />TC-1/PR-2 Transfer 20 20 40 SS <br />PR-2 Take-up Tower 24 20 80 SS <br />Refuse Truck Bin 20 20 60 SSB <br />Conveyor PR-2 Bents 14 1 700 CBEL <br />Conveyor PP-4 Bents 12 1 200 CBEL <br />* Structure Types: <br />SSENC - Structural Steel Building - Fully Enclosed with Metal Sheeting <br />SS - Structural Steel with No Siding or Enclosure <br />SSB - Fully Enclosed Structural Steel Bin <br />CBEL - Equivalent height (total) of conveyor bent (open structural steel - no siding) supporting structures <br />Table of Proposed Reinforced Concrete Floors, Footings and Other Structures <br />Item Length (ft) Width (ft) Thickness (ft) <br />Preparation Plant Footing (Equivalent Length) 308 4 2 <br />Preparation Plant Building Floor 42 112 2 <br />Control/Lab Building Footing (Eq. Length) 188 4 1 <br />Control/Lab Building Floor 42 52 1 <br />Refuse Truck Bin Foundation 20 20 1 <br />TC-1/PR-2 Transfer Tower Foundation 20 20 1 <br />Conveyor TC-1 Bent Foundation 8 2 4 <br />Conveyor PR-2 Bent Foundation (20 total - size each) 8 6 4 <br />Conveyor PR-2 Micro Piles (40 total - size each) 40 2 2 <br />Conveyor PP-4 Bent Foundations (2 total - size each) 10 2 4 <br />HDPE Pipelines: <br />Water supply line = 8" x 2,300' <br />Water discharge line = 12" x 300' <br />Conveyor P-2 Bench cut volume estimated at 10,000 yards <br />08/09- TR118