HomeMy WebLinkAbout20180398E003_Renton_ES_16_2022-11-16_FR_070
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
Page 1 of 4
v.7.20
FIELD REPORT
Date Project Name Project No. Report No.
11/16/2022 Renton Elementary School 16 20180398E003 070
Location Municipality AESI Project Manager AESI Field Rep
1075 Duvall Ave NE Renton Bruce Guenzler, L.E.G. Jackson Lundgren, G.I.T.
Permit No. Client/Owner Attn Requested By
B21004604 Renton School District No. 403 Ed Thomson Contractor
Engineer/Architect General Contractor Grading Contractor Weather
CPL / Hutteball + Oremus Cornerstone/Kyle Continental Dirt Contractors/ Jerry Jr. Sunny, 80’s
THE FOLLOWING WAS NOTED:
Associated Earth Sciences Inc. (AESI) was onsite at 7:00am at the request of the general contractor to observe excavation and
backfill within the southern parking lot and adjacent curb subgrades above the StormTech stormwater vault, as well as soil
conditions within light pole base excavations along Duvall Avenue NE. While onsite we met with representatives from both
Cornerstone and Continental Dirt Contractors.
Excavation and Backfill
Upon arrival AESI observed contractor continue to excavate approximately 100 yards of saturated backfill material 18 to 24 inches
below paving grade along the top of the stormwater vault (Fig 1). AESI observed during excavation that backfill material being
removed was moist to wet and contained large cobbles (12-18 inches in diameter). AESI then observed contractor grade the
excavation and place Tensar TX7 tri-axial geogrid along the approximately 20-foot by 40-foot excavated area (Photo 1). Contractor
then backfilled excavation with imported 2.5-inch minus crushed rock in approximately 8 to 12-inch lifts compacted with a large
drum roller (Photo 2). Contractor relayed a proof roll would be conducted 11/17/2022.
Light Pole Base Observations
AESI observed contractor placing rebar cages and form boards within the 36 to 48-inch diameter boreholes along Duvall Avenue
NE for light pole bases in preparation for concrete pouring the afternoon of 11/16/2022 & 11/17/2022. AESI observed contractor
had pumped water from the boreholes and removed sediment from minor caving near the bottom 2 feet of the boreholes as
needed before pouring concrete (Photo 3). AESI recommended pumping water from the excavations before placement of the rebar
cages and concrete if encountered in remaining light pole basins. Contractor relayed a vacuum truck would be utilized to remove
groundwater and sediment sloughed from the sides of the excavations as needed.
AESI will return for further observations and testing as requested by the client.
16
Date Project Name Project No. Report No.
11/16/2022 Renton ES 16 20180398E003 070
Page 2 of 4
FIELD REPORT
Figure 1: Approximate locations of areas of excavation and backfill with imported 2.5-inch minus crushed rock 11/16/2022 shown in green
16
Date Project Name Project No. Report No.
11/16/2022 Renton ES 16 20180398E003 070
Page 3 of 4
FIELD REPORT
Photo 1: Placing Tensar TX7 tri-axial geogrid along graded surface on top of stormwater vault
Photo 2: Rolling 2.5-inch minus crushed rock backfill with a vibratory drum roller
16
Date Project Name Project No. Report No.
11/16/2022 Renton ES 16 20180398E003 070
Page 4 of 4
FIELD REPORT
Photo 3: Light pole basin with rebar cage and formwork after pouring of concrete