2011-09-26_PERMIT FILE - C1981012 (24)

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• • • NEW ELK COAL COMPANY CONSTRUCTION DIAGRAM FOR MONITORING WELL NE -6 -10b Project: New Elk Coal Company, LLC Completion Date: 11/13/2010 Northing: 1,183,658 Driller: Stewart Brothers Drilling - Milan, NM Easting: 3,167,370 Hydrogeologist: S. Effner, Whetstone Associates Ground Elevation: 7,367.0' Screen Interval: 426.2' to 436.2' Casing Elevation: 7,370.6' Formation: Blue coal seam of the Raton Formation Depth Well Completion (feet) 8" vented steel casing stick up: 3.6' A,� locking cap 0 Tx 3'x 10" concrete pad with 4 traffic posts 4" stainless steel casing stick up: 3.3' '3.6'- 7.1': 8" steel surface casing cemented in 9 7/8 -inch borehole 40 -3.3'-42 .2': 4 -inch diameter 304 stainless steel casing 80 0'- 450.8': 9 7/8 -inch diameter borehole 120 Notes: 160 1) Stainless steel centralizers installed at top and bottom of screen and at 100 -foot intervals along blank casing. 2) All annular materials placed by tremmie pipe. 3) Filter pack settled by mechanical agitation prior to 200 setting the seal. 4) Well casing hung in suspension during well construction. 0'- 410.3': cement seal 240 280 320 337.40 Nod: static water level 360 410.3 - 419.5': - Enviroplug 3/8" coated bentonite pellet seal 4195- 419.8% 2040 gradation Colorado silica sand 400 419.8'-426.0': 10-20 gradation Cameuse Industrial silica sand 4262-4362: 0.020 -inch 426.0'-437.3': 8 -12 gradation mill slot 316 stainless steel screen Cameuse Industrial silica sand 440 437.3'- 4483 : 10-20 gradation 436.2'- 441.2': blank 316 stainless steel sump with end cap Cameuse Industrial silica sand 448.3'- 450.8': - Enviroplug 3/8" coaled bentonile pellets 480 450.8': total depth 9 7/8 -inch borehole All depths below ground surface unless otherwise noted (not to scale).