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

I~~~ --- it Civil, Structural & Geotechnical Engineers
222 South Park Ave. • MonVOSe, CO 81401
Ph.: (970) 249E828 • 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 BG06-05 @15-16' Tested by BAU/LES
Sample # GS31
Hydrometer Analvsis
ASTM D422
Sieve Opening
(mm) °~ Passing
#4 4.75 91.4
#10 2.0 84.7
#40 0.425 78.9
#200 0.075 50.8
Soil Description dark yellow brown sandy lean CLAY
USCS Classification CL
100
90
80
70
a
C
'y 60
to
A
°• 50
..
e
a
40
m
a
30
20
10
0
#zoo
Atterberq Limits
ASTM D4318
Liquid Limit (LL) 25
Plastic Limit (PL) 15
Plasticity Index (PI) 10
Natural Moisture Content (%) = 7.3%
#40 #10 #4 3/4" 3"
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 = 24.6 % Silt = 26.2 % Sand = 40.6 % Gravel = 8.6