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 3
Well No: GVMW-22A Project Name: CC&V HYDRO INV. Client: CC&V - 2736
Coordinates: 49,943E Township:
Section,
Range:
Quarters: LocationElev: 9
977ftamsl
15S
69W
17 ,
60,671 N Drilling Method: DIRECT ROTARY WaterLevelMeas.PontEle, 9,978.5 ft amsl
Drilling Company: AK Development Method: NONE Indinaeon:
' Logged By: BL/MG
90
Start Datefrime: 08/12/07 07:20 Screen Type: 20 SLOT PVC Well Casing MaL: Well Stiok.p:
PVC 1.5 FT
Completion Date/Time: 08/14/07 11:00 Gravel Pack Type: 619 SAND Cased Dept'' 0 - 50 FT Well Diameter. 2 IN
Final Depth: 220 FT Seal Type: BENTONITE CHIPS (9 bags) Borehole ID:GVMW-22A Screened Interval:
50 - 70 FT Quantity of sand:
12 ba s

0

c

d o

E

Description c
d
E
d=

u'r
J
c
_ m
0 Group name, Color, Density, Grain size/Plasticity, Moisture, 2
CD '5' 3 g U Cohes., Sed. struct, Weathering, Organics ca
CL
o
0
o
C7
0
0 °
5YR Alluvium and weathered bedrock, 0'-43', cobble chips are xgd, apditic,
5/4 CL foliated with gneiss (kspar + biotRe)
5
5YR
Moderate brown lean clay with gravel, no sand, lasts rounded -
14:40 5
[
\ 5/4 CL subrounded, with biotite and kspar clasts. Rock chips are xdg 8/16/07
10 -,o
\
' 5YR Moderate brown lean clay with gravel, no sand, lasts rounded - 9.57 2 IN PVC
0
. 5/4 CL subrounded, with biotRe and kspar clasts. Rods chips are xdg
15
10YR
Dark yellowish brown lean clay with chips from cobbles and boulders, 15
\\ 5/4 CL moist loose drilling, air lift test at 20' yields 10 gpm
20
Dark yellowish brown lean clay with chips from cobbles and boulders, 20
? " CL moist loose drilling, surface casing cuts off higherflow to c1 gpm
25
Dark yellowish brown lean clay with chips from cobbles and boulders, 25
?\
CL
moist loose drilling 8 INCH STEEL

30
30 SURFACE

?\
Weathered to fresh xgd CASING
35 35
\\ CDlluvium with xgd
40
Fresh xgd, (Pikes Peak granite) 43'-220' with fxgd (foliated Pikes Peak 40

45 ' ++ + ++ + **

+
; XGD
45
+
+ * Slow hard drilling, very tight formation
*
50 50
+

55 + +

+ - , •
+ + + +

55
20 SLOT
+
*
+
*
+
60 *
` +
* 60 X.Y SCREENED It`
+ + ; + Air lift test at 65' yields 5 gpm

+ +
65
+ *
*
T
65 i*
+ + + + .ill

70- 70
%r-

+
+
80 +* r
+ >
+ 80

85 + + ;
+ 85
+
+
;
+
+ Crystal size increasing
*
+
*
+
*

90 + + + + +
90 BENTONITE
CHIP

* BACKFILL
+
+
` *
95 + `+
*
* ; + + '
Air lift test at 100' yields 4 gpm 95
+ + +