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

'~~ ' y GEOTECH
Civil, Structural & Geotechnical Engineers
222 South Park Ave. • Montrose, CO 81401
Ph.: [phone] • FAX: [phone]
• Hydrometer Analy 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 @10-11.5' Tested by LES
Sample # GS20
Hydrometer Analysis Atterberq Limits
ASTM D422 ASTM D4318
Sieve Opening
(mm) °~ Passing
#4 4.75 100.0
#10 2.0 99.7
#40 0.425 98.9
#200 0.075 87.0
Liquid Limit (LL) 40
Plastic Limit (PL) 19
Plasticity Index (PI) 21
Natural Moisture Content (%) = 15.9%
Soil Description olive brown lean CLAY
USCS Classification CL
#200 #40 #10 #4 3/4" 3"
100
90
80
70
O1
C
'~ 60
N
a 50
Y
C
m
L 40
d
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 = 51.8 % Silt = 35.2 % Sand = 13.0 % Gravel = 0.0