HomeMy WebLinkAboutObservation of Excavation 09.04.2024
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
September 4, 2024
Jeremy Keranen
449 Ram Lane
Silt, Colorado 81652
jeremy@young-services.com
Project No. 24-7-162
Subject: Observation of Excavation, Proposed Barn/ADU, 449 Ram Lane, Silt, Colorado
Dear Jeremy:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on September 2, 2024 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 March 29, 2024, Project No. 24-7-162.
The proposed barn and ADU will be a one- and two-story structure. The building has been
designed to be supported on spread footings 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 two levels from 2½
to 7 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of hard, sandy silt and clay with calcareous layers. 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 2,000 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. We 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.