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 - 2 Project Name: CC&V HYDRO INV. Client: CC&V - 2736
Coordinates: 42,564 E Township: 15S Range: 69W Section: 17 Quarters: Location Elev:
10,134 ft amsl
61,056 N Drilling Method: DIRECT ROTARY Water Level Meas. Point Elev:
10,135.5 k amsl
Drilling Company: AK Development Method: NONE Inclination: Logged By BL
90
°
Start Date/Time: 07/24/07 21:30 Screen Type: 20 SLOT PVC Well Casing Mac: well sticks p:
PVC 1 5 FT
Completion DateMme:
07/25/07 00:20 Gravel Pack Type:
6/9 SAND Cased Depth: Well Diameter
0 - 25 FT 2 IN
Final Depth: 60 FT Seal Type: BENTONITE CHIPS (9 bags) Borehole ID:GR
764 saeenedlnterval: Quantity otSaw:
- 25 - 44 FT 12 ba ;
c
0 m
y $ ?°
E
Description a
E -y

J c
9 E
L°
£ t c o N Group name, Color, Density, Grain size/Plasticity, Moisture, ID 2
0 v Cohes., Sed. struct, Weathering, Organics
J o
C)
U
(D 1

0 6
t Oyr Alluvial and weathered bedrock, 0'-35', dark yellowish brown day
5/2 CL With sand and gravel. Sand 20-30%
5 15-2-% gravel up to 1.5cm. Some organics, Soil high plasticity 5 8 INCH STEEL
1 y y y n y t 0yr Moderate yellowish brown mixed sand with gravel, dasts with XGD, SURFACE
?1'(
i 5/4 SM quartz and volcanics. Sand is fine, very fine 60% sand, 30% fines CASING
10 q A i -I
-Ii
'
'
' with gravel up to 2cm 10
AiAiA
A
4
11

15 A?A?I
A
1JdJ
'
j 15 2IN PVC
A 4 4 10yr Dark yellowish orange mixed sand with gravel. Sand 70%, 20%
A
iA
A
A """ " 616 SM gravel, 20 fines non-plastic
A
A A
4
4
4
4
4
4
A :
20 .
.
.
.
.
.
p

10yr

XGD, large quartz & plag dasts more competent, harder drilling.
20 ..

?

7/4 Pale greyish orange, somewhat moist.
25
.. .. 25
f' 20 SLOT
o..... .,0
..
' ,?;.
30 _ . 30
a . ' Dark yellowish orange, very moist (holds shape when squezed)
35 35 SCREENEDIh
+
++ + ++ * + *
More competent XGD (Pikes Peak granite, 35'30'), bedrock
40

*
+
' -40
+
, *
* +
+
+ .
, ... More competent XGD bedrock 14:35
,V
*
* + * 7/25/07 2.49
45- -45
+ * + ` * Some quartz, plag, days present

50 50

* *
55
+
* *
*
* 55 BENTONITE
*
+
*
*
*
*
` CHIP
.+ +
+.s.
+
+ + *
, , .... _... ... BACKFILL
60 +
* 60 TD 60 FT
65 65
70 70
75 75
80 80
85 85
90 90
95 95