HomeMy WebLinkAboutFoundation Subgrade Preparation 10.28.2020Huddleston-Berry
Engineering & Testing, LLC
United Companies
PO Box 3609
Grand Junction, Colorado 81502
Attention: Mr. Robert Lewis
Subject:
Foundation Subgrade Preparation
New Batch Plant
Rifle, Colorado
2789 Riverside Parkway
Grand Junction, Colorado 81501
Phone: 970-255-8005
Info@huddlestonberry.com
October 28, 2019
Project#00256-0079
Reference: Foundation Recommendations, New Batch Plant, Rifle, Colorado by Huddleston-Berry
Engineering & Testing, LLC for United Companies, October 28, 2019.
Dear Mr. Lewis,
At your request, Huddleston-Berry Engineering and Testing, LLC (HBET) prepared this letter regarding
foundations for a new concrete batch plant proposed in Rifle, Colorado. Foundation recommendations
developed for the structure are outlined in the referenced report.
Unfortunately, HBET was not contacted to conduct an open -hole inspection to observe the subgrade
conditions below the proposed structure. However, HBET did conduct potholing around the foundation,
prior to concrete placement, to verify the subsurface conditions across the pad.
The potholes indicated that the subgrade across the building pad were consistent with the referenced
report. Sandy gravel and cobble (pit -run) soils were observed in both of the potholes. In addition, 1/4-
minus material was observed as a leveling course immediately below the foundation formwork.
Documentation regarding the potholing observations is attached.
In general, based upon our observations at the site and information in the referenced report, HBET
believes that the foundation subgrade is adequate for the allowable bearing capacity of 2,000 psf
recommended in the referenced report. A subgrade modulus of 200 pci is also appropriate.
We are pleased to be of service to your project. Please contact us if you have any questions or comments
regarding the contents of this letter.
Respectfully Submitted:
Huddleston-Berry Engineering and Testing, LLC
Michael A. Berry, P.E.
Vice President of Engineering