HomeMy WebLinkAboutBuilding Correspondence 1979-02-02I
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GEORGE L. GRIFFIN
CONSULTTNG ENGINEER
February 2, L979
Mr. Chris Thelen, Plans Checker
Department of PubLic Works
346 Main St.Springfield, Oregon
Dear Mr. Thelen:
Reference: tots 3 and 4
Connie Subdivision
Foundation Investigation
I investigated the foundation conditions at the
above location. The foundation excavation in the
area of the structures is completed to grade. The
foundation soil is a light brown, fine-grained,
silty clay, very compact with a low moisture content.
The average soil bearing value as determined by the
shear vane test method is 4OOO PSf.
I recommend a design soil bearing value of
2OOO PSF.. The soil is well suited for residential
foundations.
I recommend that a perforated pipe be placed
around the perimeter of the f,oundation on the south
slde with an outfall to the north.
If you have any questions please cal-I me.
TELEPHoNE (5O3) 746-22150
2466 MANOR DRIVE
SPRINGFIELD, OREGON 97477
Cc: Ivlr. ilohn Lawless
5L2O Franklin BIvd.
Eugene, Oregon 97403
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GEORGE L. GRIFFIN
CONSULTING ENGINEER
TELEPHoNE < 5o3 > 746-2240
2466 MANOR DRIVE
SPRINGFIELD, OREGON 97477
,fanuary 30, L979
Mr. Chrls Thelen, Plans Checker
Department of Public Works
346 ltain St.
Springfield, Oregon
Dear Mr. The1en:
Reference: Lot 5 Connie Subdivision
Foundation Investigation
At the request of Mr. John Lawless I j.nvestigated
the foundation condition at the above locati.on. The
garage area has been excavated to grade. The average
soil bearing value as determined by the shear vane test
method is 3BOO PSf. The soil is a brown silty clay
with boulders. I recommend a design soil bearing value
of I5OO PSF.
There is seepage running out of the south bank
at the contact lj.ne of the overburden and the silty
clay layer. I recommend that a 4 inch perforated pipe
be placed along the south perimeter to intercept the
seepage and to carry the seepage west to the S.W. corner
of the garage thence north to the existing storm d'rain.
?he 4 inch perforated pipe should be placed at
the footing grade or lower and covered with washed
gravel. See drawing No. 7908.
If you have any questions please call me.
Y a tru
L.
'{.{#ft
Cc: Mr. John Lawless
5120 Franklin BIvd.
Eugene, Oregon 974O3
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