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HomeMy WebLinkAbout20160674E002 Bethany Corner 2021-04-08 FR 010.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 Page 1 of 2 v.7.20 FIELD REPORT Date Project Name Project No. Report No. 2021-04-08 Bethany Corner 20160674E002 010 Location Municipality AESI Project Manager AESI Field Rep 16451 111th Ave SE Renton Matthew A. Miller, P.E. Alex Ybarra, Staff Geologist | G.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 in the PM in order to observe earthwork activities. Upon arrival we met with representatives of Tiger Mountain Homes and Fury Site Works. Site Fill: Prior to our arrival Fury had filled for roadway (Fig 1). We were informed that fill was approximately 1’ thick comprised of imported sand with gravel and some silt. We were informed that fill was placed in lifts 6” thick and compacted utilizing a smooth-drummed vibratory roller. AESI completed compaction tests at depth and achieved results which meet minimum compaction specifications (Table 1). While we were onsite Fury removed previously failing till fill over sewer trench as referenced in AESI Field Report #003. Fury removed 2’ thick of the backfill material until firm and unyielding backfill was encountered as assessed utilizing a ½” diameter steel soil probe. Storm Drain Trench Backfill: While we were onsite we observed Fury backfill for storm drain trench from CB 2A to CB3 to the vault (Fig 2). Backfill was approximately 5’ thick comprised of imported very gravelly sand with some silt. Backfill was placed in lifts 12-18” thick and compacted utilizing a vibratory ho-pac. AESI completed compaction tests at various depths below final grade and achieved results which meet minimum compaction specifications (Table 1). AESI departed the site in the PM and will return upon request. *Minimum 95% compaction required for passing result Test Location Apprx. Depth Below Final Grade (ft) Dry Density (psf) Moisture % Proctor (pcf) (ASTMD: 1557) Opt. M% %Compaction Pass/Fail* 1 Fig 1 6 119.5 10.5 126.4 8.5 95 Pass 2 Fig 1 6 124.6 8.1 126.4 8.5 99 Pass 3 Fig 1 6 123.5 8.6 126.4 8.5 98 Pass 4 Fig 1 6 122 8.9 126.4 8.5 97 Pass 5 Fig 2 2.5 136.5 6.4 141.3 7.7 97 Pass 6 Fig 2 0 135.2 8.8 141.3 7.7 96 Pass 7 Fig 2 2.5 136.1 7.5 141.3 7.7 96 Pass 8 Fig 2 0 134.1 7 141.3 7.7 95 Pass Table 1: Values for compaction tests completed. Date Project Name Project No. Report No. 2021-04-08 Bethany Corner 20160674E002 010 Page 2 of 2 FIELD REPORT Figure 1: Red outlined area shows the approximate location of fill observed. Boxed numbers show the approximate location of compaction tests completed. Figure 2: Red outlined area shows the approximate location of storm drain trench backfill observed. Boxed numbers show the approximate location of compaction tests completed.