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2007
<br />COAL EXPLORATION DRILL HOLE OR WELL ABANDONMENT REPORT
<br />RIO TINTO ENERGY AMERICA - COLOWYO MINE
<br />CX-2006-109-13
<br />See notes at end of table
<br />
<br />Drill Site No.
<br />
<br />(State Eng. Monitoring Hole
<br />Permit Number)
<br />
<br />
<br />otes
<br />
<br />
<br />.,'/.,Sec.
<br />
<br />
<br />ownship, Range
<br />
<br />
<br />asting
<br />
<br />
<br />orthing
<br />
<br />Elevation
<br />
<br />(ft)
<br />
<br />Depth
<br />
<br />(ft)
<br />
<br />Diam.
<br />
<br />(in.)
<br />
<br />Vol. (cu.ft) -
<br />
<br />Open Hole
<br />Approx.
<br />
<br />Water Level
<br />(depth - ft)
<br />
<br />
<br />rilling Method
<br />
<br />
<br />ealant
<br />Amt
<br />
<br />P.GNoL
<br />(gat) Bent
<br />
<br />Chip
<br />
<br />Bags
<br />(50#)
<br />
<br />
<br />ealed
<br />
<br />
<br />egraded
<br />
<br />
<br />eeded
<br /> Pilot Hole 1343001.96 335206.43 7939.98 460.0 79.4 P.G./C. wl c.c.' 91700 20 z
<br />ST-07.01 Core Hole SE, NW, 17 3 N., 93 W. 1342984.28 335218.47 7939.81 460.0 79.4 215 Air/Foam-Water Rotary P.G./C. w/ c.c.' 91700 26 x
<br />
<br />ST Pilot Hole 1344412.84 334817.65 7880.69 421.0 72.7 P.G./C. wl c.c.' - 135 x
<br />-07.02 Core Hole NW, SE, 17 3 N., 93 W. 1344428.82 334805.52 7881.54 255.0 R 44.0 231 Air/Foam-Water Rotary P.G.1C.w/c.c.' - 60 x
<br /> Pilot Hole 1342419.32 334423.15 8012.99 441.0 5.63 76.1 P.G.1C.w/c.c.' 10A50 11 x
<br />ST-07-03 Core HDIe SW, NW, 17 3 N., 93 W. 1342425.63 334401.80 8013.54 336.0 58.0 234 AirlFoam-Water Rotary P.G./C. w/ c.c.' - 86 x
<br />ST-07-04 Pilot Hole SW,SW,17 3 N., 93 W. 1342973.17 334157.58 7771.00 460.0 5.63 79.4 150 Air/Foam-Water Rotary P.G1C. wl c.c' 111900 6 x
<br /> Pilot Hole 1343228.48 333334.54 8060.82 420.0 5.63 72.5 P.G./C. wl c.c.' - 98 x
<br />ST-07.05 Core Hole SW, SW, 17 3 N., 93 W. 1343253.58 333356.94 8060.61 311.0 5.63 53.7 250 Air/Foam-Water Rotary P.G./C. w/ c.c.' - 74 x
<br /> Pilot Hole 1344011.43 333537.23 8064.24 360.0 5.63 62.1 P.G./C. w/ c.c.' - 77 z
<br />ST-07.06 Core Hole SE, SW, 17 3 N., 93 W. 1344038.61 333531.18 8064.32 364.5 5.63 62.9 308 Air/Foam-Water Rotary P.G./C. wl c.c.' - 80 x
<br /> Pilot Hole 1341525.75 333273.19 8249.75 500.0 5.63 86.3
<br />R
<br />t P.G./C. w/ c.c.' - 107 x
<br />ST-07-07
<br />Core Hole SE, SE, 17 3 N., 93 W.
<br />1341518.80
<br />333158.90
<br />8250.10
<br />332.0
<br />4.88
<br />43.0 225 o
<br />ary
<br />Air/Foam-Water
<br />P.G./C. w/ c.c.'
<br />-
<br />70
<br />x
<br />ST-07-08 Pilot Hole SW, SW, 17 3 N., 93 W. 1342533.69 333174.52 7876.68 480.0 5.63 82.8 316 Air/Foam-Water Rotary P.G./C. w/ c.c.' 1211000 4 x
<br /> Pilot Hole 1343528.13 333087.84 8145.34 401.0 5.63 69.2 P.G.IC.w/c.c.' - 92 x
<br />ST-07.09 Core Hole SE, SW, 17 3 N., 93 W. 1343512.60 333087.26 8145.03 400.0 5.63 69.0 262 Air/Foam-Water Rotary P.G./C.w/c.c.` - 92 x
<br /> Pilot Hole 1342781.48 332234.78 8235.53 420.0 5.63 72.5 P.G./C. wl c.c.` - 93 x
<br />ST-07-10 Core Hole NE, NW, 17 3 N., 93 W. 1342751.36 332217.40 8235.92 401.0 5.63 69.2 260 Air/Foam-Water Rotary P.G.IC.wlc.c.' - 83 x
<br /> Pilot Hole 1340702.05 331352.51 8345.67 921.0 5.63 156.9
<br />t
<br />R P.G./C. wl c.c.` 18/1200 18 x
<br />ST-07.11 Core Hole NE, NE, 19 3 N., 93 W. 1340717.67 331368.79 8346.20 296.0 5.63 51.1 560 o
<br />ary
<br />Air/Foam-Water P.G./C.wlc.c.' - 66 x
<br /> Pilot Hole 1341991.67 331339.47 8330.04 440.0 5.63 75.9 P.G.IC.w/c.c.' 81750 15 x
<br />ST-07-12 Core Hole SE, NE, 19 3 N., 93 W. 1341960.91 331329.45 8329.85 399.0 5.63 66.9 392 Air/Foam Water Rotary P.G.IC.wlc.c.' - 86 x
<br /> Pilot Hole 1349295.71 338101.40 784325 401.0 5.63 69.2 (1) (2) (2)
<br />WP-07-02 Core Hole SE, SE, 9 3 N., 93 W. 1349284.2D 338104.92 7843.21 379.0 5.63 65.4 - AirlFoam-Water Rotary (1) (2) (2)
<br /> Pilot Hole 1348576.49 336351.26 7794.53 320.0 5.63 552 (1) (2) (2)
<br />WP-07.03 Core Hole SE, SW, 9 3 N., 93 W. 1348549.68 336331.79 7794.72 294.0 5.63 50.7 - Air/Foam-Water Rotary (1) (2) (2)
<br /> Pilot Hole 1350558.40 337335.46 7768.56 341.0 5.63 58.8
<br />t P.G./C." - 78 x (2) (2)
<br />WP-07-04 Core Hole NW, NE, 17 3 N., 93 W. 1350543.59 337344.50 7768.90 313.0 5.63 54.0 - Air/Foam-Water Ro
<br />ary P.G.1C." - 73 z (2) (2)
<br /> Pilot Hole 1349694.15 337514.48 7834.24 340.0 5.63 58.7
<br />t
<br />R P.G1C." - 98 x (2) (2)
<br />WP-07-05 Core Hole NW, NE, 16 3 N., 93 W. 1349682.15 337518.86 7835.23 353.0 5.63 60.9 - o
<br />ary
<br />AirlFoam-Water P.G./C." - 74 z (2) (2)
<br />WP-07.11 Core Hole SE, SW, 9 3 N., 93 W. 1349002.20 336640.16 7789.08 335.0 5.63 57.8 Air/Foam-Water Rotary (1) (2) (2)
<br />WP-07-12 Core Hole NE, NW, 16 3 N., 93 W. 1349129.02 337612.52 7846.73 333.0 5.63 57.5 _ AirlFoam-Water Rotary P.G./C" - 76 x (2) (2)
<br />NOTES: ' - P.G./C. wl c.c. - Plug gel and/or bentonite chips with 2 to 3 foot concrete cap. ° - P.G./C - Plug geland/or bentonite chips. No concrete cap since mmea area may oe aistumea
<br /> aunng reciamauon.
<br />(1) - These drill/core holes are located within the West Pa mining area and will be mined through. After drilling, the hole was covered with rock(s) and native material.
<br />(2) - These locations are locate in the West Pit or Section 16 mining areas. The sites will be reclaimed during reclamation activities after coal mining ceases.
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