HomeMy WebLinkAbout20160674E002 Bethany Corner 2021-03-30 FR 005.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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FIELD REPORT
Date Project Name Project No. Report No.
2021-03-30 Bethany Corner 20160674E002 005
Location Municipality AESI Project Manager AESI Field Rep
16451 111th Ave SE Renton Matthew A. Miller, P.E. Zach Skelton, E.I.T.
Permit No. Client/Owner Attn Requested By
Mark Seek (Tiger Mountain Homes) Mark Seek Contractor
Engineer/Architect General Contractor Grading Contractor Weather
D.R. Strong Tiger Mountain Homes / Mark Fury Site Works P. Cloudy 50’s
THE FOLLOWING WAS NOTED:
Associated Earth Sciences, Inc. (AESI) arrived on site at approximately 10:15 am and stayed until approximately 12:00 pm
at the request of the contractor to observe sanitary sewer main and side sewer backfill. While on site we met with Mark
Seek with Tiger Mountain Homes and representatives of Fury Site Works.
Sanitary Sewer Main and Side Sewer Backfill
Prior to our arrival, Fury had completed excavation and installation of the side sewers for Lot 2 and Lot 9 and backfilled
the Lot 2 side sewer. Upon our arrival, the contractor was installing a 6-inch T600 PVC pipe for the Lot 3 side sewer. This
pipe was bedded and covered in approximately 3 inches and 12 inches of pea gravel, respectively.
While on site, AESI observed the contractor backfill a portion of the sanitary sewer main and the Lot 3 side sewer. Backfill
material consists of imported gravel borrow, which is a gray-brown coarse sand and gravel with trace silt. Backfill was
completed in multiple lifts approximately 1-foot thick. Compaction was achieved with a CAT 315C L tracked hoe pac or a
HAMM 3077 smooth vibratory drum roller. Figure 1 shows the area of sanitary sewer main and side sewer observed by
AESI today. Table 1 shows the results of compaction tests performed by AESI today. Per Soos Creek Water & Sewer
district, a minimum of 90% compaction is required for areas 3 feet below grade or deeper and a minimum 95%
compaction is required for areas shallower than 3 feet below grade (see Figure 2).
AESI intends to return tomorrow to continue monitoring side sewer and sanitary sewer main backfill.
Table 1: Compaction Results of Tests Taken Today
Test Location
Depth below
grade (ft)
Dry Density
(pcf) M %
Proctor (pcf),
ASTM D: 1557 Opt.M% %Compaction Pass/Fail*
1 Sewer, Figure 1 5 126.5 6.9 141.3 7.7 90 Pass
2 Sewer, Figure 1 7 134.6 7.2 141.3 7.7 95 Pass
3 Sewer, Figure 1 4 126.6 6.4 141.3 7.7 90 Pass
4 Sewer, Figure 1 3 131.1 7.8 141.3 7.7 93 Pass
5 Sewer, Figure 1 5 127.4 7.4 141.3 7.7 90 Pass
*Minimum 90% compaction required for tests deeper than 3 feet or deeper, minimum 95% compaction required for tests shallower than 3 feet.
Date Project Name Project No. Report No.
2021-03-30 Bethany Corner 20160674E002 005
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FIELD REPORT
Figure 1 – Location of sewer observed by AESI today shown in red. Green shows sewer that was in process upon our
departure. Approximate locations of compaction tests shown in yellow.
NN
MH 1381-2
2 1 4 3 5
Date Project Name Project No. Report No.
2021-03-30 Bethany Corner 20160674E002 005
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FIELD REPORT
Figure 2 – Trench detail from Soos Creek Water & Sewer District showing compaction requirements.