HomeMy WebLinkAboutObservation of Excavation 04.04.2026Excavation for building footings along gridlines A-B/1-5 (see attached map)Location:
Performed by:
Comments:
Excavation Contractor:Grace LaytonTally Ho Construction
Geotechnical Report
Geotechnical Engineer:Ground Engineering Consultants Report Date:No report
Anticipated Condition:Moisture Conditioned and Compacted
Special Considerations:No project geotechnical report has been prepared for this area. Project structural drawings indicate design based on an
assumed maximum allowable bearing pressure of 1,500 psf.
Encountered Conditions
Excavation Condition:We observed the excavation for the proposed footings, as located in the photo below, and found dense, moist silt and clay.
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 1,500
psf and/or expansive clay soils resulting in differential movement 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.
Conformance
Excavation Conditions:
Conforms Does Not Conform Not Applicable Not Observed
Report No.:
Photos
Highlighted = Location of open hole inspection Excavation for footing at GL B/2
Tally Ho Construction
111 E 3rd Street
Rifle, CO 81650
Jeff Parrington
Vantage Aviation Fuel Farm - Pole Barn at Rifle Airport
Client:
Excavation / Open Hole Observations
Work Order No.:Apr 4, 2026 26-6532.Excavation-OpenHole.0001; ver: 1Report Date:
Work Order Date:Apr 3, 2026 Reviewed By:Steve Peters
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 1