PERMFILE52920

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 7/3/2007
• Doc Name: 03/29/2007 Stability Evaluation Report Appendix B Laboratory Index Test Results
• Section_Exhibit Name: Volume XI Coal Mine Waste Disposal Area No. 3
• Media Type: D
• Archive: No

~ GEOTECH
Civil, SWCtural 8 Geotechnical Engineers
222 South Park Ave. • Montrose, CO 81401
Ph.: [phone] • FAX: [phone]
• Hvdrometer Analv sis and Atterberq Limits
Project Name Gob Pile Stability Date 1/2/2007
Project Location Bowie Mine Gob Pile #3 Project # 06481-002-02
Client Bowie Resources Sample by BB
Test Location BG06-03 @5-6.5' Tested by LES
Sample # GS19
Hvdrometer Analvsis Atterberq Limits
ASTM D422 ASTM 0431 B
Sieve D~mm;9 % Passing
#4 4.75 99.3
#10 2.0 97.2
#40 0.425 95.3
#200 0.075 73.8
Liquid Limit (LL) 34
Plastic Limit (PL) 17
Plasticity Index (PI) 17
Natural Moisture Content (%) = 12.2%
Soil Description brown lean CLAY with sand
USCS Classification CL
a2ao
100
90
80
70
m
c
rn 60
N
R<
a 50
Y
C
d
L 40
d
a
30
20
10
0
#40 lF70 7t4 3/4" ,
0.001 0.01 0.1 1 10 100
Particle Diameter (mm)
Clay size Silt size Fine Medium Coarse Fine Coarse
FINES SAND GRAVEL
Clay = 39.5 % Silt = 34.3 % Sand = 25.5 % Gravel = 0.7