2008-05-14_PERMIT FILE - M2007087

• Permit No: M2007087
• IBM Index Class Name: Permit File
• Doc Date: 5/14/2008
• Doc Name: Potential Stability Issues
• From: Arcadis
• To: Environment, Inc.
• Media Type: D
• Archive: No

`41IV .&4. D
2.6
TABLE 1 - TYPICAL SOIL AND ROCK PROPERTIES
Description Unit weight Friction
Cohesion
(Saturate d/dry) angle
Type Material ib1ft3 kN/m3 degrees lb1ft2 kPa
Loose sand, uniform grain size 118/90 19/14 28-34*
Dense sand, uniform grain size 130/109 21/17 32-40*
Loose sand, mixed grain size 124/99 20/16 34-40*
Dense sand, mixed grain size 135/116 21/18 38-46*
i
? N U o
d m Gravel uniform rain size 1401130 22/2n 14-17*
C

N Sand and gravel, mixed grain size 120/110 19/17 48-45*
v
o x
Basalt
140/110
22/17
40-50*

tt Chalk 80/62 13/10 30-40*
m
o
Granite
125/110
20/17
45-50*
a
ro
Limestone
120/100
19/16
35-40*
4 Sandstone 110/80 17/13 35-45* i
Shale 125/100 20/16 30-35*
w
Soft bentonite 80/30 13/6 7-13 200-400 10-20
Very soft organic clay 90/40 14/6 12-16 200-600 10-30
Soft, slightly organic clay 100/60 16/10 22-27 400-1000 20-50
a Soft glacial clay 110/76 17/12 27-32 600-1500 30-70

v Stiff glacial clay 130/105 20/17 30-32 500-3000 70-150,
Glacial till, mixed grain size 145/130 23/20 32-35 000-5000 150-250.
>
V, Hard igneous rocks - **
160 to 190
25 to 30
35-45
720000-
35000-
= granite, basalt, porphyry 1150000 55000
0
Metamorphic rocks - 160 to 180 25 to 28 30-40 400000- 200Q0-
800000 40000
quartzite, gneiss, slate
a
Hard sedimentary rocks -
156 to 180
23 to 28
35-45
200000-
10000-
600000 30000
limestone, dolomite, sandstone
Soft sedimentary rock - 110 to 150 17 to 23 25-35 20000 - 1000-
sandstone, coal, chalk, shale 400000 20000
* Higher friction angles in cohesionless materials occur at low confining or normal
stresses as discussed in Chapter 5•
** For intact rock, the unit weight of the material does not vary significantly between
saturated and dry states with the exception of materials such as porous sandstones.

i
i
7 I