HomeMy WebLinkAboutPermit Building 1990-9-6
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Jack Q. Tomkins
Engineering Geologist
and
Soils Specialist
4630 Larkwood Street
Eugene, Oregon 97405
(503) 343-3890
September 6, 1990.
MET/TO EANDUM
TO:
M:i,ke Hallanan
477 No. 72nd Pl.
Springfield, Or. 97478
3UBJECT: Site Ev~luation
591 Cascade Dr.
Springfield, Or.
I inspected construction site on SeptembEr 5, 1990
Lot sloped about 10 degrees from left front to right rear with
3 feet break of slope in vicinity of right rear and within con~
structlon H}'ea.
1. RiGht rear pad/fiJ.:l constructed as follows:
a. Top soil removed to fractured basalt bedrock.
b. Up to 1.5 feet of bar run placed and compacted in 6 inch
lifts.
c. 0.5 feet of li minus crushed rock placed and compacted to
footing grade.
d. Foundation set-back from top edge of pad to be 3.0 feet~
e. Large basalt bbulders up to 2.0 ft. in di~meter excavated
from site placed on face of slopB (up to 5.0,feet high)
as riprap buttress.
2. Balance of construction area:
a. Step-graded from garage to residence area exposing hard,!
fractured basalt bedrock in silty matrix.
b. II inch minus crushed rock to,p dressing plac.ed and com-
pacted to footing grade.
3. Consider pad/fill as constr'ucted and balance of foundation
area will provide stable base for pro~d residence.
Q...(/} I" cJ-/;Ib~:-'<b41.
dJ. 'Q. Tomkins .
'Engineering Geologist
No. EIB6 Oregon
cc Building Safety'Division
Springfield, Or.
Att: Donald Moore
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