PERMFILE104365

• Permit No: M1988042
• IBM Index Class Name: Permit File
• Doc Name: APPLICATION FOR MINING & RECLAMATION PERMIT
• Media Type: D
• Archive: No

r.
_.~
•f~ .~, /
;~ ~-+ September
Mac Graham 1~ 's~~` `'
Western Paving Company,- "` „ -
P.O. Box 21649 '~ •
Denver, C:0 .80221 .•' . ~ ~ -*
t~''
Dear Mr. Graham:
'n ineeri
J .r,
d ~ar~i~s
Y _ ~. _~
.~. ~~
. • ~~, ,
~~A *~ ~:
' ; ~ ~ ~~
7,7, 1981 ~± ' .
-,~,'
M?'~ ; .
s~~4 ~ ~~~
~. ~; t
~, . r $ ,.
•s, ~ ;
~On May 28, 1981, Engineering Dynamics performed sound level measure-
ments at Western Pavings Del Camino Gravel Operation. The purpose
of the me asuremants__was to determine the magnitude of noise generated
by the loading operation. r;~ ,
f .. .~
Sound measurements were ~ '
peF,~oY~faed on a. Cat 988. diesel engine front.'•"
end loader at +~.:distdnee p~ ~.Qd feet. The front end loader generateh'::,;
maximum noise levc9s :8tu~i.7tt~. tt~:~ticket loading operation. 'The maxi-~; '
:mum sound level~.me~t~red ~'. the bucket loading operation was '• ;,,~~; •, .;
83 dB(A) and the ay~rage so~level measured during this time pas,' •
80 dB(A). During the•ai}ne ifie ~~z'ont end loader was dumping the gravel ••
;'into the haul truck, the ac-~se level was measured to be about 70 dB(A)..~.
'Sound level .measurements were also performed on gravel haul trilicks
`(25 ton) passing by a# a distance of 50 feet. The maximum sound '~~ ~~
;pressure level generated by a loaded haul truck was 73 dB(A). - -'
1f you have any questions regarding this report, please contact me
at our Englewood office.
Sincerely yours,
ENGINEERING DYNAMICS, INC. .
~ ~~~_ . _
John Barthell
south kalamath street
ewood, Colorado 80110
761-4367 .
8420 Belmar boulevard
st. loins, missouri 63124
[phone]
s ..
916 west vlrglnla avenue
qunnlson, Colorado 81230
[phone]

;; :~: