2007-11-28_HYDROLOGY - C1981019

• Permit No: C1981019
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/28/2007
• Doc Name: Section 28 Pond As Built Certification and Construction Report
• From: Colowyo Coal Company
• To: DRMS
• Permit Index Doc Type: Prof Pond Certifications
• Media Type: D
• Archive: No

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lob Name: Rio Tinto Colowyo -Section 28 Pond PROCTOR TEST
Sample I.aoatlan: On-Site (Upper Borrow Ares) _ ~ RESULTS__ ~ ~ ,
sail Deacrlptlon: Gravelly Sandy Clay_ (CL) Sample N°. 9P
o..-i..,.. u.:..,.,n.....,-...,.,....e..M,
Mazimvm Dry Denatly: 118.2 pef Dpk M°teWre Cont°nt: 13.09. Proeedwe: A$TM D698 I+~npnlaw~r. emponim
LIQWa umlt: 27 PlaeUclty Index: 12 Dais: 09 13/07 r.~~mm varo+.o.w~nan
vw+ox+4ay..u«r.em;r
craves: 28 7. sand: i7 % sslt k clay (-zoo): 55 % rob. No. 07-7649 TecL: CD
Att. A2-5