HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-7-19
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K& A Engineering, Inc.
3327 Roanoke Ave., Eugene, OR 97408
'. (541) 684-9399 Voice,
(541 ).684-9358 FAX
July 19, 2007
Mr. Duane Knights
2258 33'd St. .
Springfield, OR 97477
Project: 42.06
SUbject: Foundation pad inspection
. . ?pringfield permit no. COM2006-00115
6263/6265 Aster St., Springfield, Oregon
PURPOSE AND SCOPE .
As requested, we have inspected the foundation pad excavated for the subject project. K & A Engineering, Inc.
has previously provided geotechnical recommendations for development of this project site.' The purp.ose of
our inspection was to determine if the foundation pad has been prepared to adequately support foundation loads
of the proposed 2-story duplex.
The scope of our services for this inspec.tion included several visual inspections during site development and
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this report.
SITE INSPECTIONS
Buttress Retaining Walls.
We inspected the site during construction of the buttress retaining walls (designed by K & A Engineering, Inc. .
and provided with our supplemental recommendations dated October 18, 2006). Two terraced retaining walls,
consisting of segmental masonry facing with geogrid-reinforced mechanically stabilized earth backfill, were
constructed to our specifications.tor materials and methods. The subgrade for these walls was prepared
according to our recommendations and consisted of dense basalt silty-gravelly colluvium and bedrock.
Foundation Pad
The foundation pad located below the retaining walls, adjacent to the street right-of-way, consists of two
benches cut into the native dense basalt colluvial silty-sandy-gravelly colluvium. . A thin lift (approximately 3 to
4-ihchesof %'inch minus dense-graded crushed aggregate was placed on the undisturbed colluvial subgrade.
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SUMMARY AND RECOMMENDATIONS .
Based on our site inspections, it is our opinion that the site has been adeqoately prepared according to our
recommendations arid will provide suitable support for the proposed foundation system.
'''Levelll geotechnical sile assessment,:' Sepiember 21,2006; "Suppiemental recommendations ~ Springfield LDAP plan
review/correction letter daied 9/12/2006," October 18, 2006; and "Supple menIal recommendations ~ wet weather
. construction," Decemtier 6,2006. .
K & A Engineering, Inc.
We recommend acceptance of the foundation pad and bullress retaining.wall system, asconslrucled, by
the local building 'ollicial.
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Please note that it. is vital that the perimeter foundation dfainage system be constructed according to our original
. recommendations. This drainage system should be installed after construction of the perimeter footing and
stem wall. . ". .
Thank you for the opportunity to be of service. Please call us if you have questions or need further assistance.
Sincerely,
EXPIRES /i~f.?,'
Michael Remboldt, P.E.
K & A Engineering, Inc.
Project: 42.06
Client: Knights
6263/6265 Aster St., Springfield, Oregon
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Juiy 19; 2007