2008-04-15_REVISION - M1980244 ‎(306)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 4/15/2008
• Doc Name: VOL II Appendix 2, Attachment B- Grassy Valley 2007 Monitoring Well and Piezometer Borelogs
• From: CC&V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

•
•
WATER MANAGEMENT CONSULTANTS WELL CONSTRUCTION DIAGRAM Sheet No: 1 of 1
Well No: OSABH - 5 Project Name: CC&V HYDRO INV. Client: CC&V - 2736
Coordinates: 44,592 E Township: Range: Section: Quarters:
15S 69W 17 Location Elev:
10,091 ft amsl
60,759N Drilling Method: DIRECT ROTARY Water Level Meas. PointElev: 10,093 Itamsl
Drilling Company: AK Development Method: NONE inclination: 90" Logged By: BL / LS
Start Datelrime: 07/23107 22:00 Screen Type: 20 SLOT PVC Well Casing Mat: Well Stkkwp:
PVC 2 FT
Completion Date/rime: 07/24/07 12:00 Gravel Pack Type: 6/9 SAND Cased Depth: 0 - 15 FT Well Diameter. 2 IN
Final Depth: 51 FT Seal Type: BENTONITE CHIPS Borehole ID:GR
767 Sceenedintenai: Q-tity of
Sand:
- 15 - 25 FT -

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escription

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E E

0

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E
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c 0
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0 >1
m Group name, Color, Density, Grain size/Plasticity, Moisture, 2
F= 9 J E -
d 2 ?°
o r m U Cohes., Sed. struct, Weathering, Organics m as
2
' o? o 00

0 U
0 U

1 Oyr
Alluvium and weathered bedrock, 0'-30', dark yellowish orange, lean -
12:45
:'• 616 CUCH clay with sand and gravel, Low plasticity clay with clasts of breccia 7/25/07 DRY 8 INCH STEEL
5 w up to 4 cm, dry with no organics, clogging the equipment
--- - -- - - - -- 5 SURFACE
CASING
10 - -- l -- -- _---_ .____...---_- ----_.- . 10 2 IN PVC
PERFORATE[
15 -- - - - - - ---- - --- -
-----
15
,.
.:. , ` STEEL
8 IN
a•
l CASING

20
---
20 L :r
:.
SCREENEDIh
Chips of Tphu -1 cm (Tphu: undifferentiated phonalite)
- j
20 SLOT
25
,1
2
25 .

30 30 c ::.: :::•. i
Tphu 30'-50', Harder, fresher, stronger
a . .... ........ TPHU
35 = ." a-. -- - -- -- - ---- - -- - --- 35

40 v
=a e. _.. --- - - - - - --- -- - - --- -- ----- -... - -- -- --- -40

Chips smaller-.5 cm still iron stained NITE
B
CHIP
HIP
BACKFILL
45 a _--?-
°
'
' - -. ... - - -- - ---- ------ ------ ----- --- - - - - - 45
•:
. NOTE: Problems while drilling prevented 5 ft intervals from being
taken. Hammer stuck in surface casing drilling resumed at 03:30.
50
TD 51 FT
55 - -- -- --- .._..- _.. -- - - -------- _.... - - 55
60 - - - - ---

...................... --

..
... -- -- -- ---- - - ---- - --- - - - - --- -- --- -
---
60

65
-- - - ---
............ .. .
..
---
.......
-----
--- ---
....-
-
65
70
......................
........ 70
75
....................
........ 75
80
......................
........ 80
85 - -- -
__..._.._....... -- -
.....-. --- - - - -- - -- --- -- - - 85
90
....
........ 90
95 95