HomeMy WebLinkAbout20160674E002 Bethany Corner 2021-03-26 FR 003.pdf
Kirkland | Tacoma | Mount Vernon
425-827-7701| www.aesgeo.com
Date Mailed:
Principal / PM: Matthew A. Miller, P.E.
This document is considered a DRAFT until signed or initialed by an AESI Principal or Project Manager
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v.7.20
FIELD REPORT
Date Project Name Project No. Report No.
3/26/21 Bethany Corner 20160674E002 003
Location Municipality AESI Project Manager AESI Field Rep
16451 111th Ave SE Renton Matthew A. Miller, P.E. Scott R. Hannah, L.E.G.
Permit No. Client/Owner Attn Requested By
B20004261 Mark Seek (Tiger Mountain Homes) Mark Seek Client
Engineer/Architect General Contractor Grading Contractor Weather
D.R. Strong Tiger Mountain Homes / Mark Fury Site Works/Mike, Dan P. Cloudy 50’s
THE FOLLOWING WAS NOTED:
Sewer Trench Backfill:
Onsite at 1:15pm today to test sewer trench backfill. While onsite, we met Mark Seek and Jim with Fury. The contractor
had installed sewer main for a second day (shown in dashed red on plan below) and ended the excavation roughly within
40 feet of the eastern manhole (1381-2). The sewer trench work for today was backfilled with 4 to 6 feet of imported
Gravel Borrow, per the contractor, up to the existing road grade. The existing road grade was 5 to 6 feet below the
surrounding grade due to previous over-excavation of unsuitable soils. AESI collected Proctors at the end of yesterday of
the imported gravel borrow and the onsite, at depth lodgement till soil. No compaction results were available today but,
will be presented below when the Proctor analysis is completed.
We completed compaction testing on the surface of the imported trench backfill, which was 6 to 8 feet below finished
road grade, per Mark and one location on the surface of the native soil placed yesterday to near surrounding grade
(numbered green dots below). We noted that the gravel borrow in the eastern portion of the trench backfill was yielding
under foot. We noted that the till fill placed yesterday in the trench under the road but, outside the road overx. appeared
to need more compaction or was also yielding underfoot. We understood that the trench fill would generally stay at its
current level for a week or two before road fill started being placed, so additional compaction could be done, if necessary.
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Date Project Name Project No. Report No.
3/26/21 Bethany Corner 20160674E002 003
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FIELD REPORT
*Minimum required compaction 90% below 3’, 95% above 3’ per Soos Sewer District specs.
Test
Sewer
Trench
Location
Apprx. Depth
Below Final
Grade (ft)
Dry Density
(psf)
Moisture
%
Proctor (pcf)
(ASTMD: 1557) Opt. M% %Compaction Pass/Fail*
1 See plan 8 133.7 9.0 141.3 7.7 95 P
2 See plan 6 138.0 6.9 141.3 7.7 98 P
3 See plan 7 130.3 10.0 141.3 7.7 92 P
4 See plan 2 115.3 10.3 136.7 6.8 84 F
Table 1: Values for compaction tests completed.
East end of
sewer trench
Storm water vault
East end of
sewer trench
looking west
Western portion of sewer trench looking east
across native soil backfill and to gravel borrow
Western manhole
outside of road