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

Civil, Structural & Geotechnical Engineers
222 South Park Ave. • Montrose, CO 81401
Ph.: [phone] • FAX: [phone]
• Hydrometer Analvsis and Atterberq Limits
Project Name Gob Pile Stability Date 1/11/2007
Project Location Bowie Mine Gob Pile #3 Project # 06481-002-02
Client Bowie Resources Sample by BB
Test Location BG06-06 @20-21' Tested by BAU
Sample # GS38
Hydrometer Analvsis Atterberq Limits
ASTM D422 ASTM D4318
Sieve Opening
(mm) e~ Passing
#4 4.75 75.2
#10 2.0 68.0
#40 0.425 61.0
#200 0.075 34.3
Liquid Limit (LL) 21
Plastic Limit (PL) 17
Plasticity Index (PI) 4
Natural Moisture Content (%) = 9.7%
Soil Description dark brown silty clayey SAND with gravel
• USCS Classification SC-SM
#200 #40 #10 #4 3/4" 3"
100
90
$Q
70
C
H 60
N
' a 50
c
m
40
m
a
30
20
10
0
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 = 14.2 °k Silt = 20.1 % Sand = 40.9 % Gravel = 24.8