PERMFILE134368

• Permit No: C1981022
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Water Communication Potential from Overlying Workings /Abel, 1992
• Section_Exhibit Name: Exhibit 2.04-E4 Part 6
• Media Type: D
• Archive: No

Sanborn Creek Project Page 5 Auqust 21, 1992
• Table 1. Approximate interburden spacings and lithologic
distributions between coal seams, statistical inference
Borehole Shale Sandstone Coal Total
Ident. ($ in ($ in ($ in interburden
section) section) section) Thickness
(feet)
"E" Seam to "D" Seam
WSC-1 28.5$ 56.4$ 15.1$ 145.8
WSC-2 36.8$ 52.0$ 11.2$ 135.8
WSC-4 57.8$ 33.5$ 8.7$ 84.1
WSC-7 ----- ----- ----- 138.2
Mean 41.0$ 47.3$ 11.7$ 125.9
Std Dev 15.1$ 12.2$ 3.2$ 28.2
95$ C.I. 78.5- 3.5$ 77.6-17.0$ 19.6- 3.8$ 170.8- 81.0
99$ C.I. 100 - 0$ 100 - 0$ 30.0- 0$ 208.3- 43.5
"D" Seam to "C^ Seam
WSC-1 28.5$ 70.9$ 0.6$ 192.1
WSC-2 40.8$ 59.2$ 0.0$ 188.5 .
WSC-4 44.0$ 54.3$ 1.7$ 199.3
WSC-7 ----- ----- ----- 195.0
• Mean
Std Dev 37.8$
8.2$ 61.5$
8.5$ 0.8$
0.9$ 193.7
4.6
95$ C.I. 58.2-17.4; 82.6-40.4$ 3.0- 0$ 201.0-186.4
99$ C.I. 84.8- 0$ 100 -28.8$ 6.0- 0$ 207.1-180.3
"C" Seam to "B" Seam
WSC-1 63.3$ 36.7$ 0.0$ 41.3
WSC-2 ----- ----- ----- 34.6
WSC-4 28.5$ 71.5$ 0.0$ 54.3
WSC-7 ----- ----- ----- 46.7
Mean 45.9$ 54.1$ 0.0$ 44.2
Std Dev 24.6$ 24.6$ 0.0$ 8.4
95$ C.I. 100 - 0$ 100 - 0$ ---- 57.6- 30.8
99$ C.I. 100 - 0$ 100 - 0$ ---- 68.7- 19.7
"E" Seam to "C" Seam
WSC-1 27.9$ 63.3$ 8.7$ 344.8
WSC-2 38.3$ 55.0$ 6.6$ 331.1
WSC-4 48.2$ 46.6$ 5.1$ 307.1
WSC-7 ----- ----- ----- 339.1
Mean 38.1$ 55.0$ 6.8$ 338.5
Std Dev 10.2$ 8.4$ 1.8$ 16.6
95$ C.I. 63.4-12.8$ 75.9-34.1$ 11.3- 2.3$ 364.9-312.1
• 99$ C.I. 96.5- 0$ 100 - 6.9$ 17.1- 0$ 387.0-290.0
NOTE: C.I. - Confide nce Interval