REP49917

• Permit No: C1981041
• IBM Index Class Name: Report
• Doc Date: 10/19/1999
• Doc Name: QUARTERLY REFUSE PILE INSPECTION REPORT 3RD QTR 1999 and May 1994 Phase II Stability Anaylysis
• Permit Index Doc Type: STABILITY REPORT
• Media Type: D
• Archive: No

W.0. NO. 3618.01 DRILL LOG REPORT SHEET 2 OF 2
CLIENT / JOB DESCRIPTION POWDERHORN COAL COMPANY / CRDA ~1 GEOTECHNICAI INVESTIGATION
LOCATION CRDA #1 / BENCH //1 HOLE NO. 6 (200 SERIES PZ'S)
COORD. N. 101 6757.84 E, 1081 63.43 GROUND ELEV. 4873.39 DIP (ANGLE FROM NOR/Z.f NA BEARING NA
DATE BEGUN 3/23/94 FINISHED 3/23/94 RIG TYPE MOBILE DRILL 8-50 LOGGED BY J.HECK
INTERVAL CORE
RECOVERY
LING C
N
T
S
VISU
LASSIFICATIO
CORE S
P
E
D
V
MPLE PENETRATION TESTS
FROM TO (FT) /
AL C
AM
/
DRIL
O
DI
ION
N /
L
RI
E SA BLOWS PEN/FT
33 35 LOST DRILLING CONDITIONS: HARD
DRIVE TEST: 27/27/27/30 .5/.5/.5/.5
35 40 DRILLING CONDITIONS: HARD 35-37', SOFT 37-37.5', HARD 37.5-38.5'
V.HARD 38.5-40'
VISUAL CLASSIFICATION: COAL REFUSE
2 CORE SAMPLE: V.WET 35-38', DRY 38-40'
40 45 DRILLING CONDITIONS: VERY SOFT: 40-45'
VISUAL CLASSIFICATION: COAL REFUSE 40-44', ALLUVIUM 44-45'
5 CORE SAMPLE: V.WET 40-44', MOIST 44-45'
45 50 DRILLING CONDITIONS: FIRM TO SOFT 45-50'
VISUAL CLASSIFICATION: ALLUVIUM
5 CORE SAMPLE: MOIST 45-50'
50 55 DRILLING CONDITIONS: SOFT 50-52', HARD 52-55'
55 55.17 0,77 DRIVE TEST: 63 .17
VISUAL CLASSIFICATION: IGNEOUS RIVER COBBLE
55.17 60 DRILLING CONDITIONS: V.HARD 55.17-60'

ALLUVIUM SAMPLE: 44-50'

PLATE 1 9 Es EQ RN
rE~~~F ,,,~\~7