HomeMy WebLinkAboutObservation of Excavation 03.25.2022lGrf iiffifi'åifffini'i,"å*"'5020 County Road 154
Glenwood Springs, CO 81601
phone: (970)945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
www.kumarusa.comAn Employcc olrntd Compony
Office Locations: Denver (HQ), Parter, Colorado Springs, Fort Collins, Glenwood Springs, and Sumrnit County, Colorado
March 25,2022
Generalandpro
Attn: Gabriel Michael
P. O. Box 133022
Dallas, Texas 75316
generalandpro@ gmail. com
Project No. 20-7-528
Subject:Observation of Excavation, Proposed Steel Building, Shaw Prcperty,1773
County Road 24l,Garfteld County, Colorado
Gentlemen:
As requested, the undersigued representative of Kumar & Associates,Inc. observed the
excavation at the subject site on March 25,2022 to evaluate the soils exposed for foundation
support. The findings of orn 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 October 15,2020, Project No. 20-7-528.
We understand the proposed metal building has been designed to be founded on spread footings
bearing on the natural soils and sized for an allowable bearing pressure of 2,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in one levelfrom?Yz
to 6 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of stiff, very sandy clay and silt with scattered gravel. No free water was encountered
in the excavation and the soils were slightly moist to moist. There was about I fo 2 inches of
mud in the bottom of the southeast corner of the excavation.
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 2,000 psf. Loose and disturbed soils should be removed in the footing areas
to expose the undisturbed natural soils. Any softened soils and mud should be removed before
concrete placement. The bearing soils should be protected from frost and concrete should not be
Generalandpro
March 25,2022
Page2
placed on frozen 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 advised 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 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'
Ifyou have any questions or need further assistance, pleaSe call our office
Sincerely, t
Kumar & Associatcs, lnc.
Robert L. Duran, P.E.
Rev. by: SMM
RLD/
cc:Chris Shaw (shaw.chris94(4)gmai l.conÐ
Kumar & Associates, lnc. @ Project No. 20-7-528