REP06359

• Permit No: M1997014
• IBM Index Class Name: Report
• Doc Date: 6/6/1997
• Doc Name: GROUND MOTION SURVEY OF THE DEER CREEK CANYON QUARRY
• Media Type: D
• Archive: No

t ~
~' ~, '~ ~
.Q•°~ _ ~0
.+
CONCLUSIONS
~~
The ground motion observed in the vicinity of the Deer Creek
•-..-~.,.L.~Canyon Quarry is below widely accepted standards for maximum
> ~_-'d;!sq ^ eak particle velocity. It has been observed that 95$ of all
~`- ' ~' ,,
'1••"'~~"L'"'~tructures are undamaged by ground motion not exceeding a peak
~~~~^~"~+ particle velocity of 2.0 in/sec (Duvall and Fogelson, 1961).
!~'~ y.~y~6ome government agencies have adopted a maximum peak particle
`,`'' '',velocity of 1.0 in/sec as a guideline. Explosives users often
'~;~
' _,
/ U-`•~~ry to maintain peak particle velocities below 0.5 in/sec as a
-•conaervative approach.
~';;'
~~ ~•
.'~•. r~.!ri
-• he maximum peak particle velocity outside the Deer Creek Canyon
... 1•.
®~ ~r;.~uarry did not exceed 0.5 in/sec. The highest velocity outside
~"^ ~- ~77
~, ..;.
'~~ ~~t~:=~ ~elow normal standards. The maximum peak particle velocity was
t;.
y.,. `'~ easured at the conveyor within the quarry and was 0.82 in/sec.
~~~ °~ .
~~
~' In order to estimate ground velocities at the house and overhang
1.
~....eY ` ~. '
^.,,., for shots in the last year, a linear relationship for ground
~~~
,8-~ ~~,-"~avelocities at the DWB and GOL seismographs between shots and at
~~1'~~~!s'`_~.the quarry was 0.44 in/sec at the ridge between the quarry and
11 rixj~l~
,1~` ~' ~;~.t}the Painter house. The velocities at the house and rock overhang
~""-~y
%` tr~'~iaere 0.08 and 0.24 in/sec respectively. These ground motions are
23
•-~J• .
'''~-~~~he points of interest near the Deer Creek Canyon Quarry has been
._.
~, ~ssumed. This may be expressed by the equation:
~'i }
~^
r
~'~'
"~"4w '" uHouse, Shot X __ VDWB, Shot X
, . ~,,,;~;?>, ~ VHouse, Shot July 3 VDWB, Shot July 3
'~,:~°"~
}~ 1 ~~
ii ~- ~~
~, ¢~~~ MICROGEOI'HYSICS