HomeMy WebLinkAbout20180398E003 Renton ES 16 2022-06-29 FR 032
Kirkland | Tacoma | Mount Vernon
425-827-7701| www.aesgeo.com
Date Mailed: Principal / PM: Bruce Guenzler, L.G., L.E.G.
This document is considered a DRAFT until signed or initialed by an AESI Principal or Project Manager
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FIELD REPORT
Date Project Name Project No. Report No.
06/29/2022 Renton Elementary School 16 20180398E003 032
Location Municipality AESI Project Manager AESI Field Rep
1075 Duvall Ave NE Renton Bruce Guenzler, L.E.G. Zach Brodkey
Permit No. Client/Owner Attn Requested By
B21004604 Renton School District No. 403 Ed Thomson Client
Engineer/Architect General Contractor Grading Contractor Weather
CPL / Hutteball + Oremus Cornerstone/Kyle Continental Dirt Contractors/ Jerry Jr. Cloudy, 60’s
THE FOLLOWING WAS NOTED:
AESI arrived mid-morning at the request of the contractors in order to observe the aeration and compaction of lifts in the North
grading area, the continuation Southward of the water main trench, and compaction of lifts surrounding the large L-shaped footings
and nearby spread footings in section C of the building footprint. No new observations on MEPs were required today.
North Grading Area:
CDC is continuing to pull wetter than optimum soil from the stockpile and set it in 1-foot lifts over the grading area, aerating it by
turning with a disc, scraping it with a dozer, and compacting it with a smooth drum vibratory roller. We observed compaction of two
lifts throughout the grading area, took density tests and observed with a probe and visually. When the first lift of the day was
compacted, we took a passing density test near the middle of the grading area and probed. The lift was firm and unyielding in our
opinion so the next lift was added and aerated/compacted. The second lift also met required density and appeared firm under wheel
loading. The results for the density tests are in Table 1.
Building Section C Footing Backfill:
Native soil fill was used to backfill the trenches surrounding two of the large L-shaped footings in the North end of building section C,
as well as 3 of the nearby square spread footings (Figure 2). Upon completion footing backfill observed today was firm and
unyielding and adequate for footing backfill in our opinion.
Water Main:
Excavation and backfill of the trench continued Southward throughout the day. The material being excavated and then replaced as
backfill became increasingly rocky and oversized moving southward as the material for the Northern bus loop goes from native soil
(weathered till) to the 2.5” minus crushed rock from the building pad and quarry spall underneath. Densometer testing was not
possible due to mixing of materials and excessive oversize rock, so fill was observed by hand probing and observation of soil behavior
during compaction. As on the previous day 6/28/2022, this portion of the water main trench was excavated 5 feet deep below the
final subgrade. The excavated pipe bed was firm and unyielding native soil. 2 feet of 7/8” minus crushed rock pipe bedding was laid,
then 3 lifts of the soil/rock mix were laid and compacted with the hoepac and the smooth drum vibratory roller to reach final
subgrade. These lifts were observed visually and with a T-probe and observed to be firm and unyielding.
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Date Project Name Project No. Report No.
06/29/2022 Renton ES 16 20180398E003 032
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FIELD REPORT
Table 1: Density Test Results
Test
No. Location
Depth
from
current
grade
(ft)
Proctor (ASTM
D1557)
Dry
Density
(pcf)
Moisture
%
Compaction
% Pass/Fail
1 See Figure 1 2 133.5/8% 126.6 10.3 95 Pass
2 See Figure 1 1 133.5/8% 126.2 10.2 95 Pass
Figure 1: Layout of Earthworks Across the Site 6/29/22
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Date Project Name Project No. Report No.
06/29/2022 Renton ES 16 20180398E003 032
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FIELD REPORT
Figure 2: Building Section C Backfills 6/29/22
Highlighted in blue: Footings which received backfill in trenches surrounding concrete