HomeMy WebLinkAboutPermit Correspondence 2006-8-1
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HILL&DALE ENGINEERING, LLC
1850 OAK STREET SUITE C
EUGENE, OREGON 97401
541-868-0667
FAX: 541-868-0888
08/01/06
Jeff Casley
923 S. 55th PI.
Springfield, OR 97478
RE: 6446 Forest Ridlle Dr. - Site/Soils/Compaction Investigation - Job #275-06
As you requested, a site soils investigation was performed at the above address. Site visits were
performed on July 17-20,31,2006 to supervise the excavation of the site for the proposed construction.
All unsuitable fills, organics an,d other unsuitable material has been removed to native grade. The native
soil is decomposed sandstone with cobbles/foliated rock and has a Unified Classification of GM and a
plasticity index ofless than 20. This soil is not considered expansive (after Holtz 1959). Imported
compacted I 1/2" minus crushed rock was placed as needed to a depth in excess of 6" to raise and level
the pad to the desired footing elevation, for the placement of the proposed foundation. .
A compaction inspection on the gravel fill was performed on July 31,2006. The compacted surface of
the crushed rock is adequate for the proposed foundation and has a minimum bearing capacity of 1500
psf. The compaction of the gravel surface is greater than 95% of a standard proctor per ASTM D698.
This report is limited to the site soils investigation related to soils and fill in regard to soil conditions at
the excavated structure site at the above address only.
Thank you for this opportunity to be of service. If you have questions regarding this report, contact me at
868-0667.
Sincerely,
Pamela S. Hi)lstrom, P.E.
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