HomeMy WebLinkAboutObservation of Excavation 09.28.2023Report Date:
Work Order Date:
ENGINEERING
Sep 28, 2023
Sep 27,2023
C/renf; Steve Brackett
Willow Creek Companies
28485 Highway 6, Unit 4
Rifle, CO 81650
Williams Field Services - Piceance Basin
Work Order No.: 23-6582.Compaction.0003; ver: I
Reviewed by: Chris Hutto
tion
Earthwork Contractor:
Equipment Used:
Weather, High/Low Temp.:
Ite m/Stru cture Type/N u m be r:
Placement Location:
Comments:
Willow Creek Companies Performed by: Cody Peacock
ExcavatorlPlate CompactorlRemote Trench Nuclear Gauge: 58, Troxler 3440, 36175
Roller
Sunny, 86/48 (oF) Standard Counts: 1945/668
Structural Fill
Rulison pad
For the proposed thickened edge slab, Willow Creek removed nât¡ve soils and replaced w¡th Class 6 ABC. No project
geotechnical report has been prepared for this area. Project structural drawings indicate design based on a maximum
assumed allowable bearing pressure of 2,000 psf. Based upon our experience and on the IBC presumed soil load
bearing pressurês in Table 1806.2, this soil type, at the elevations and time of our observations, likely meets or exceeds
the presumed allowable bearing pressure used in the design. However, the presence of weaker subsurface soil layers
resulting in allowable bearing pressure of less than 2,000 psf cannot be ruled out by surface observations only.
Quantitatively verifying soil bearing capacity generally requires access to subsurface information and Standard
Penetration test data. lf this is desired, we recommend drilling and data collection be performed.
On-Site Notifications
Name
Jeff Hollingshead
Dale Woàd
Gompany
Wjllow Creek Companies
Williams
Lab Max. Dry Density (pcf)
136.0
Material Properties
Lab opt. MC (%)Soil Type
Class 6 ABC
Proctor Method
D 1557
Specifications
Spec, lD - Specifigation Title
268 - Structural Fill - Sand
268 - Structural Fill - Sand
Propefi
Moist. Dev. (7o)
Relative Comp. (%)
sRgcified
-2lo 2
95 min.
Nuclear Soil Density and Mo¡sture Content (ASïM D6938 and D4718 / AASHTO T3l0 and T2241
Results
Iesf No. Spec. ID
I 268
268
Test Location
'12' N.W from S.E corner
12'N.E. from S.W. corner
Gauge Corr.
Elevation Total Wet Field Dry
@ Density Density
@cû (pcf)
3',BG 139.5 133.2
3'BG 139,5 133.0
Lab
Max. Dry Lab Opt.
Density MC (%)
(pct)
136.0 5.9
136.0 5.9
Moist. Pass
Dev. (%) or Fail
-1.2 Pass
.l.0 Pass
Corr.
Field
Mc (%)
Relative
Comp.
(%)
98.0
97.8
4.7
4.9't0
Commonly Used Abbreviations:
RSG = Rougl¡ Su¡face Grade
BG = Below Grade
RFG = Rough Footing Grade
Results apply only to the specific items and locations referenced and at the time of test¡ng, observations or special inspections. This report should not
be reproduced, except in full, without the written permission of GROUND Engineering Consultants, lnc.
41 lnverness Dríve East, Englewood, Colorado wtwnt.groundeng.com 303-289-1989
Englewood I Commerce City I Loveland I Granby I Gypsum I Colorado Springs Page I of 2
EROIfTfD
C/renf: Steve Brackett
Willow Creek Companies
28485 Highway 6, Un¡t 4
Rifle, CO 81650
Report Date:
Work Order Date:
ENGINEERING
9ep28,2023
Seg 27,2023
Williams Field Services - Piceance Basin
Work Order No.: 23-65í2.Compaction.0003; ver: 1
Reviewed by: Chris Hutto
Photos:--æTr*iç
.,.**I*t' t* " t
Resulis apply only to the specific items and locations referenced and at the time of testing, observations or special inspections. This report should not
be reproduced, except in full, without the written permission of GROUND Engineering Consultants, lnc.
41 lnverness Drlve East, Englet tood, Colorado www.groundeng.com 303-289-1989
Ënglewood I Commerce City I Loveland I Granby I tiypsum I Uolorado Springs Page 2 of 2