HomeMy WebLinkAboutObservation of Excavation 8.30.22l(+rlHffiffir#ü**5020 County Road t 54
Glenwood Springs, CO 81ó01
phorre: (970) 945-7988
fax: (97û) 945-8454
email : kaglenwood(@kumarusa.co¡n
www.kumarusa.colllAn Êmployô€ û,nnad Compony
0ffice Locations: Denver (HQ), Pa:ker, Colorado Springs. Fo¡t Collins, Cienrvootl Springs, and Sumnril County, Colorario
August 30,2022
Dave Cardiff Construction
Attn: Dave Cardiff
506 Mesa Verde
Carbondale, Colorado 81 623
davçqa¡di ffçonstruqtlqn{iù gur ail.ç,qm
Project No. l8-7-300.4
Subject: Observation of,Ðxcavation, Proposecl Residence, LaT2Z,Ranch at Coulter Creek,
Saddle Ðrive, Garfield County, Coloraelo
Dear Dave:
As requested, the undersigned representative of Kumar & Associates, Inc. observed the
excavation at the subject site on August 29,2A22 to evaluate the scils exposed for foundation
support. The findings of our observatious and recommendations fcrr the foundation design are
presented in this report. We previously conducted a subsoil study fr:r design of foundations at
the site and presented our findings in a report dated J*ne 6, 201 8, Project No. 18-?-3û0.
The proposed residence will be a one-story wood frame structure ov€r a walkout basement level
witlr an attached garuge Foundations were designed fbr an allowable soil bearing pressure of
2,000 psf.
At the tirne of our visit to the site, the foundation excavation had been cut in five levels from 1 to
11 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
oonsisted of about moistened and compacted, ó to 8 inches t>f 3/¿-inchroad base ovedying the
basalt rocks in a graveily sandy silt matrix. No fi'ee water was cneountered in the excavation and
the natural soils, below the ccrnpacted road base were slightiy moist.
The soil conditions exposed in the excavation are consistent with those previously encountered
on the site and suitable for support of spread firotings designecl firr the recoinmended allowable
bearing pressure of 2,û0û psf. Loose and disturbed soils should be removed in the footing areas
to expose the undisturbed natural soils. Other recolnnendaticns presented in our previous report
which are applicable should also be abserved.
The recomrnendations subrnitted in this letier are based on our observation of the soils exposed
within the foundation excavation and the previous limited subsurface explaration at the site.
Variations in the subsurface conditions below the excavation eoulcl increase the risk of
foundation movernent. V/e should be advised of any variations encountered in the excavation
conditions lbr possible changes to recomrnendations contained in this ietter. Our services do not
include determining the presence, prevention or possibility of rnold or other biological
H¿øautz
Dave Cardi ff Construction
August 30,2022
Page2
contaminants (MOBC) developing in the fi.rture. 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 flrther assistance, please call our office.
Sincerely,
Kumar & Associates,Inc.
C
Daniel E. Hardin,
Rev. by: SLP
DEHikac
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Kumar & Associates, lnc. o Project No. 18.7-300,4