HomeMy WebLinkAboutObservation of ExcavationlGn#ffiffiffii$'i*"5020 County Roacl 154
Glenwood Springs, C0 81601
phone: (970) 945-?988
fax: (970) 945-8454
email : kaglenwood@kumarusa.com
www.kumarusa.comAn Employcc Orngd Compony
Qffice Locations: Denver {l'lQ}, Parher, Colorado Springs, Fcrt Collins, Clenwood Springs, and Summit County, Colorado
Novernber 8,2022
Robby Sille
11236 Talport Loop
New Port Richey, Florida 34654
rsiup6lt4rnqabg's"Po1$
project No. 2l-7-166
Subject: Observation of Excavation, Proposed Residence, Lot28, Filing 9, Elk Springs,
81 Kingbird Drive, Garfield County, Colorado
Dear Robby:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on November 8,2022 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 April 8, 2021,, Project No. 21-7-166.
The proposed residence will be a two-story wood-frame building with attached garage. The
residence will be support on spread footings sized for the recommended allowable bearing
pressure of 2,500 psf.
At the time of our visit to the site, the foundation excavation had been cut in one level from 3 to
8 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted mainly of basalt gravel and cobbles in a highly calcareous sandy silt matrix with
scattered large boulders. 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 2,500 psf. Loose 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. We should be advised of any variations encountered in the exoavation 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
Robby Sille
November 8,2022
Pagc 2
O,IOBC) developing in the future. Ifthe client is concemed about MOBC, then a professional in
this special field ofpractice should be L'onsulted.
If you have any questious or need furtlrer assistance, please call our office.
Since,rely,
Kumar & Associater, fnc.
Steven L,
Rev. by: JHP
SLP/kac
co: RM Construction- SamWilliams (swillialns{g)}uildwithrm.cont
R\rt Construction - Ryan Floumoy (rtloumoy@.ltuildwithnn.cour)
Kumar & Aasociates, lnc. @ Proi€ct Ho.2t-?-lS6