HomeMy WebLinkAboutObservation of Excavation 07.23.2019Kumar & Associates, inc.®
Geotechnical and Materials Engineers
and Environmental Scientists
An Employee Owned Company
5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
July 23, 2019
Alex Gomez
11521 East 118th Avenue
Henderson, Colorado 80640
aj__gor ersanchez(a),msn, co w
Subject:
Alex:
Project No. 19-7-282
Observation of Excavation, Proposed Residence, Lot E-16, Aspen Equestrian
Estates, 33 Equestrian Way, Garfield County, Colorado
As requested by Jose Campuzano, a representative of Kumar & Associates, Inc. observed the
excavation at the subject site on July 22 and 23, 2019 to evaluate the soils exposed for
foundation support. The findings of our observations and recommendations for the foundation
design are presented in this report. We previously conducted a subsoil study for design of
foundations at the site and presented our findings in a report dated May 20, 2019,
Project No. 19-7-282.
The proposed residence will be founded on spread footings bearing on the natural sandy clay
soils designed for an allowable maximum bearing pressure of 1,500 psf.
At the time of our visit to the site on July 22, 2019, the foundation excavation was partially
complete and had been cut in one level, 2 feet below the adjacent ground surface. At the time of
our visit to the site on July 23, 2019, the foundation excavation was complete and had been cut in
one level from 1'/2 to 2 feet below the adjacent ground surface. The soils exposed in the bottom
of the excavation consisted of sandy to very sandy clay. No free water was encountered in the
excavation and the soils were slightly moist to moist.
The soil conditions exposed in the excavation are consistent with those previously encountered
on the site and suitable for support of spread footings designed for the recommended allowable
bearing pressure of 1,500 psf. Loose and disturbed soils should be removed in the footing areas
to expose the undisturbed natural soils. Other recommendations presented in our previous report
which are applicable should also be observed.
The recommendations submitted in this letter are based on our observation of the soils exposed
within the foundation excavation and the previous limited subsurface exploration at the site.
Variations in the subsurface conditions below the excavation could increase the risk of
foundation movement. We should be advised of any variations encountered in the excavation
Alex Gomez
July 23, 2019
Page 2
conditions for possible changes to recommendations contained in this letter. Our services do not
include determining the presence, prevention or possibility of mold or other biological
contaminants (MOBC) developing in the future. If the client is concerned about MOBC, then a
professional in this special field of practice should be consulted.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
rfwi
Robert L. Duran, E. I.
Reviewed by:
Steven L. Pawlak, P.
RLD/kac
cc: Red House Architc �ture - Bruc •;Barth(bruce@redhousearchitecture.com)
Aspen Valley Carp -� J`c�e Campuzano (aspenvalleycarpentry(gmail.com)
Kumar & Associates, Inc. ® Project No. 19.7-282