HomeMy WebLinkAboutBuilding Correspondence 2000-6-7
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14 :.06 FAX 5417467.
PSI SPRINGFIELD
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l"'~;lInformation
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&""'neerlng . Consulting. 7ltstlng
June 7, 2000
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Mr. Greg Larkin
River Valley Builders, Inc.
P.O. Box 2041
Corvallis, Oregon 97339
Sllbject'
Pad Completion Letter
Amblealde Meadows SllbdivlBlon, Lot #I '9
Springfield, OrcgOD
PSI File No. 72:1..00154
Dear Mr. LaIkin:
Professional Service Industries, Inc. (PSI) has completed a hOllse pad subgmda evaluation at the
abovo refuenced lot. .11u: foundation 8ubgrada soils within tha house pad area ....re visually
olassified as dark brown. .ilty clay. 11u: house pad area was probod with a ~ inch diameter .oil
probe and appeared fino at the time of our site visit. Moisture content t=rts wero taken at ",ariollS
locations throughout the housa pad. The moisture content tests ranged from 29 to 32 pen:ent.
Based on previous testing l"'.....i-.-..ed an this soil type, the moisture content tests taken are
acceptable for this type of potentia.lly expansive soil,
Tha contractor has gnuled the house pad subgmde such thllt it slopes downward from south to
north at approximately 2 porcem. The contrnctor then placed up to 12 inches of 3-inch miDu.
aggregate fill within the north side of Ibe Jot and 4 inches of crushed aggregate. granuJar fiU over
the house pad area to achieve fioal grade and camp acted the material. A proofroU of the
compacted granuJar fill WBS pedDrmed using a loaded dump truck. No deflection WIlS observed
within the bouse pad area at the time of our Bite visit. The crushed aggregate, granular fill
viaually appeared to be woU compacted at the time of our site visit.
We recmnmcod that finished grade adjacomto the exterior portion of the footinS" and slabs be at
least 2 feet higher Iban tlte expansive bearing soils. This is to provide a buffor from
environmental cbanges that conld caUBe the expansive soils to dry and hydrate. It will be
impe",tive that the 2-foot buffer of land.~r- soil be compacted to a firm condition to reduce the
infiltration of water at the surface.
During fowulation construction, water should not be IIll0wed to collect in foundation e",,"vations,
on floor .Iab areas, or on prepared. sub grades of the cons1IUction m:a either during or after
construction. Undercut Or excavated areas should be .Ioped toward one corruor to facilitate
removal of my collected rainwater. grOUDdwater, OJ" surface JUl\off. .
Positive site drainage ac4Ior foundation draina should be provided to reduce infiltration of surface
wale< aroWld the perimeter of !he house BOd beneath the floor Blabs. The permanent grad.s
sbould be Biguificantly sloped away from the honse building are.. BOd surf""" drainage should be
collected and discharged such tbat water is not permitted to infiltrate the bacldIll and floor slab
areas of the residence.
ProfCllSsional Ser\lice Industries, Inc.. 1040,A Shelley St. . Springlield, OR 97~77. phDnB 54'1{746.9649 . Fax 541n46-7163
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06/12/00
14: 06. FAX 54174671.
PSI SPR}~f!.lELD
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1/11002
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AmbIeside Meadows
Lot #99
June 7, 2000
Pago 2 on
All <rawl spaces should be provided with a low-point crawl space drain connected to the storm
sewer or ......_...J disposal system (outlet). All areas of Ibe CI1lwl "P""e should be graded to
drain to the low-point drain. AU crawl space aro.. should be covered with a v1squeeo moisture
barrier. The low-point drain should be lower than the elevation of the visqucco moisture barrier.
Based upon our observations. the house pad subgrade has been constructed in general accardancc
with industry standards for lightly loaded (1,500 pounds per square foot or less) foundation loads
typical for this type of caDSlNction.. If you have any questions regarding this report, please feel
free to contact us at 746-9649.
RespectfuJIy Submitted,
PROFESSIONAL SERVICE INDUSTRIES, INC.
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Brian Cunier. E.I.T.
Staff Engineer
I EXPIfIES: 8J3O
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Troy Hull, P.E.
Project Engineer
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