HomeMy WebLinkAboutObsevation of ExcavationKumar & Associates, Inc.
'f Geotechnical and Materials Engineers 5020 County Road 154
and Environmental Scientists Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
M &r4* yo C wr ed Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
July 15, 2024
Luis Vargas
792 Castle Valley Boulevard
New Castle, Colorado 81647
umbllc(a)gmail.com
Project No. 19-7-682.01
Subject: Observation of Excavation, Proposed Residence, Lot 23, Filing 1, First Eagles
Point, Battlement Mesa, 325 Eagle Ridge Drive, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on July 10, 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 January 6, 2020, Project No. 19-7-682.
The proposed residence will be above crawlspace and supported by spread footings placed on
the natural rocky soils and sized for the recommended allowable bearing pressure of 2,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in one level which
daylighted on the downhill, north side and up to about 3 to 4 feet below the adjacent ground
surface on the south side. The soils exposed in the bottom of the excavation consisted of mainly
calcareous silty sand and basalt gravel, cobbles and boulders. No free water was encountered
in the excavation and the soils were slightly 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 disturbed soils in the footing areas should be moistened
and compacted. 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 the 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.
Luis Vargas
July15, 2024
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Assoc
Steven L. Pawl
SLP/kac
Kumar & Associates, Inc. 0 Project No.19-7-682.01