HomeMy WebLinkAboutObservation of Excavation 09.25.2023Weeler Gulch Compressor Pad Placement Location:
Willow Creek Companies Earthwork Contractor:Performed by:Cody Peacock
Weather, High/Low Temp.:Sunny, 79/46 (ºF)
Name Company
On-Site Notifications
Steve Brackett Willow Creek Companies
Jeff Hollingshead Willow Creek Companies
Dale Wood Williams
Equipment Used:Excavator|Plate Compactor|Remote Trench
Roller
Nuclear Gauge:
Standard Counts:1945 / 667
58, Troxler 3440, 36175
Comments:For the proposed thickened edge slab, Willow Creek removed native soils and replaced with 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 pressures 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. If this is desired, we recommend drilling and data collection be performed.
Item/Structure Type/Number:Structural Fill
Specifications
Spec. ID - Specification Title Property Specified
268 - Structural Fill - Sand Moist. Dev. (%)-2 to 2
268 - Structural Fill - Sand Relative Comp. (%)95 min.
Test No.Spec. ID Test Location Elevation
(ft)
Gauge
Total Wet
Density
(pcf)
Corr.
Field Dry
Density
(pcf)
Corr.
Field
MC (%)
Lab
Max. Dry
Density
(pcf)
Lab Opt.
MC (%)
Relative
Comp.
(%)
Moist.
Dev. (%)
Pass
or Fail
3 268 15’ N.E. from S.W. corner 2’ BG 140.5 133.2 5.5 136.0 5.9 97.9 -0.4 Pass
4 268 5’ N.E. from S.W. corner 2’ BG 140.2 131.9 6.3 136.0 5.9 97.0 0.4 Pass
5 268 20’ N.E. from S.W. corner 1’ BG 138.9 129.5 7.3 136.0 5.9 95.2 1.4 Pass
6 268 12’ N.E. from S.W. corner 1’ BG 140.1 131.9 6.2 136.0 5.9 97.0 0.3 Pass
7 268 21’ N.E. from S.W. corner RSG 140.2 132.4 5.9 136.0 5.9 97.3 0.0 Pass
8 268 8’ N.E. from S.W. corner RSG 138.3 130.8 5.7 136.0 5.9 96.2 -0.2 Pass
Nuclear Soil Density and Moisture Content (ASTM D6938 and D4718 / AASHTO T310 and T224)
Results
RSG = Rough Surface Grade
BG = Below Grade
RFG = Rough Footing Grade
Commonly Used Abbreviations:
Lab Max. Dry Density (pcf)Lab Opt. MC (%)Soil Type Proctor Method
136.0 5.9 Class 6 ABC D 1557
Material Properties
Willow Creek Companies
28485 Highway 6, Unit 4
Rifle, CO 81650
Steve Brackett
Williams Field Services - Piceance Basin
Client:
Report Date:Work Order No.:
Compaction
23-6582.Compaction.0002; ver: 1Sep 25, 2023
Sep 20, 2023Work Order Date:Reviewed by:Chris Hutto
Results 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, Inc.
41 Inverness Drive East, Englewood, Colorado www.groundeng.com 303-289-1989
Englewood | Commerce City | Loveland | Granby | Gypsum | Colorado Springs Page 1 of 2
Photos
2’ BG
Willow Creek Companies
28485 Highway 6, Unit 4
Rifle, CO 81650
Steve Brackett
Williams Field Services - Piceance Basin
Client:
Report Date:Work Order No.:
Compaction
23-6582.Compaction.0002; ver: 1Sep 25, 2023
Sep 20, 2023Work Order Date:Reviewed by:Chris Hutto
Results 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, Inc.
41 Inverness Drive East, Englewood, Colorado www.groundeng.com 303-289-1989
Englewood | Commerce City | Loveland | Granby | Gypsum | Colorado Springs Page 2 of 2