2008-11-24_PERMIT FILE - C1996083 ‎(12)‎

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 11/24/2008
• Doc Name: Geotechnical Data Report Bruce Park Dam, GEI Consultants, April 2001
• Section_Exhibit Name: Volume X Bruce Park Dam Geotechnical Studies
• Media Type: D
• Archive: No

Geotechnical Data Report Bruce Park Dam
Bowie Resources, Limited
April 2001
401)
Section 4 - Field Testing Program
4.1 General
Field testing in embankment and foundation soils included standard penetration testing and
pocket penetrometer testing. Field testing in foundation bedrock included one attempted
packer permeability test. The results of field testing are provided on boring logs in
Appendix B.
4.2 Standard Penetration Test
Standard Penetration Tests (SPT) were performed in general accordance with the procedures
described in ASTM D-1586. The method involves driving a 1-3/8-inch I.D. split-barrel
sampler into the soil using a 140-pound hammer free-falling a distance of 30 inches. The
• number of blows required to advance the sampler 18 inches was recorded in 6-inch
} increments. The number of blows recorded over the last 12 inches or until refusal (the N
value) gives an indication of the consistency, relative density or stiffness of the soil.
SPT blowcounts were recorded in Borings BD101, BD102, BS102 and BS104. SPT
blowcounts recorded for "new" embankment fill ranged from 10 to 24 with an average of 16.
SPT blowcounts were not performed in the "old" embankment fill. SPT blowcounts
recorded for the foundation soils ranged from 67 to over 100 with an average over 100.
4.3 Pocket Penetrometer Testing
A pocket penetrometer test is used to estimate the unconfined compressive strength of
cohesive (clay) soils in the field. The test method involves a hand-held device consisting a
%4-inch diameter rod connected to a calibrated spring. The rod is slowly inserted into the soil
to a depth of`/4-inch. The resistance of the soil to penetration by the rod compresses the
calibrated spring and the unconfined compressive strength is read from graduated markings
inscribed on the rod.
Pocket penetrometer tests were performed on dry core and HQ cord samples of clay soils
collected from Borings BD 103 and BD 105. The indicated unconfined compressive strength
values recorded for "new" embankment fill ranged from 1.75 to 4.5 tons per square foot (tsf)
with an average of 2.8 tsf. The strength values recorded for "old" embankment fill ranged
from 1.5 to 3.2 tsf with an average of 1.9 tsf. The strength values recorded for foundation
soils ranged from 2.75 to 4.0 tsf with an average of 3.3 tsf.
GE I Consultants; Inc. 99292 01-04-16 Geotecnn-cal Data Report