HomeMy WebLinkAboutObservation of Excavation 08.28.2021l(trtm''
An gnploy¡c Ownrd Coopony
5020 County Road 154
Glenwood Springs, CO 8ló01
phone: (970) 945-?988
fax; (970) 945-8454
email; kaglenwood@kumarusa.com
www.kumarysa.com
Office L¡catíons: Dørver (HQ), Parker, Colorado Springs, Fort Collins, Clenwood Springs, and Summit County, Colorado
August 28,2021
Peter Dolan
270 Sam Grange Court
Caúondale, Colorado 81623pdolaqaspen@aol"com
projæt Na.20-7-722
Subjecl Observation of Excavation, Proposed Residence, Lot 18, Cerise Ranch, Larkspur
Driven G¿irfield County, Colorado
Dear Peter:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on August 26,2021to evaluate the soils exposed for foundation support. The
findings of our observations and recommendations for the foundation design are presented in this
repoñ. V/e previously conducted a subsoil study for design of foundations at the site and
presented our findings in a report dated January 4,2021, Project No.20-7-722.
At the time of our visit to the site, the foundation excavation had been cut in four levels from 3 to
I feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
oonsisted of stiü sandy silty clay with scattered gravel. 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 1,200 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 subsurface exploration at the site. Variations
in the subsurface conditions below the excavation could increase the risk of foundation
movement, V/e should be advjsed of any variations encountered in the excavation 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 biologieal contaminants
{MOBC) developing in the future. If the client is concerned about MOBC, then a professional in
this special ñeld of practice should be consulted.
If you have any questions or need further assistanceo please call our office.
Sincerely,
Kumar & Associates, Inc.
Daniel E. Hardin, P
Rev. by: SLP
DEH/îac