GENERAL49745

• Permit No: M1973021
• IBM Index Class Name: General Documents
• Doc Date: 7/12/1972
• From: COLO SCHOOL OF MINES RESEARCH INSTITUTE
• To: COOLEY GRAVEL CO
• Media Type: D
• Archive: No

Mr. Dale Ream
Cooley Gravel Co.
July 10, 1472
Page 4
Table 1 -
Data Reduction for Morrison Quarry Shot
Cooley Gravel Company
June 8, 1972 I
Maximum Rawtl) Acceleration (directly From record)
Transverse 0.035 g - 16 hz~2) ,
Vertical 0. 035 g - 16 hz~2) ~
Radial 0. OS g - 13 hz~2) '
1/ Accelerometer frequency response is down 12 decibelsjoctave
for frequencies higher than natural instrument frequency of
12 hz.
21 Frequencies are determined graphically from record and
timemarks.
Corrected
Maximum Maximum Maximum
Acceleration Velocity Dis-placement
Transverse: 0. 07 g - 27 inJsecz 0, 27 in/sec 2, 7 X 10-3 in,
Vertical: 0.07 g - 27 inJsecz 0. 27 in/sec 2, 7 X 10-3 in.
Radial: 0. 055 g - 21 inJsecz 0. 26 in/sec 3, 1 X 10-3 in.
(VOTE: On a hard rock site less than 150 yards from shot point, the
maximum acceleration was less than 0. 1 g.