HomeMy WebLinkAboutPermit Correspondence 1991-05-03Etnanch Engineening
21? O Street
Springfield, Oregon 97477
[5O3] 74r,,-r,,637
FAX [sO3] 74E.O3,AS,
May 3, 1991
Karen & Kent Porter
2547 North 3lst Street
Springfield, OR 97477
RE: Inspection of proposed building site at:
620 So. 68th Place, SPringfield, OR
I-ot 10, Block 9, CASCADE HEIGHTS 1ST ADDITION
Dear Karen,
As requested, Branch Engineering inspected the building site on May 3, 1991. The building pad
site was excavated and found to be in a reasonably dry condition.
By examining the cut area, the foundation soil was found to consist of a silty clay loam (dark
biown) with iome cobbles mixed with the soil. The I-ane County Soil survey indicates this soil
as T'ype 43C Dixonville-philomath-Hazelair complex. A small amount of clay was found near
th. r*fu.., but this was removed and the remaining soil was uniform and firm. We recommend
the following construction method be used at this site:
l. The excavated building pad area should be covered with compacted rock backfill to allow
for a clean "al1-weather" construction site.
Z. perimeter 3" or 4" perforated pipe should be installed as a french drain along the south
and east walls of the structure (the west wall may also need some perforated pipe as
determined after finish excavation). Slope pipe to drain to the northeast and run solid
3" or 4" pipe (also for crawl space and roof drains) to outfall at curb/gutter weepholes,
two weepiol.r'*. recommended as a minimum. The excavation contractor checked the
gutter-to-pad excavation difference in elevation and the gutter at the NE property corner
upp"u6 to be about one foot lower than the pad excavation subgrade.
3. In the event ltem 2 above does not have positive drainage to the gutter, then a dry-well
will be needed (most likely at the northwest portion of the site).
TFIANBPOFITATION clvlL SUEIVEYING'
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Add rebar to perimeter foundation, such as (l) continuous #4 bar at top of stem wall and
(2) continuous #4 bars at footing.
5. Rebar or woven wire reinforcement is recommended in the Eara5e area slab.
Based on the completion of the above construction methods, the site would be suitable for the
proposed residential structure.
If you have any questions, please call our office.
Sincerely,
/.)F.1.',
v'
James A. Branch, P.E
rlm:91-88
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