HomeMy WebLinkAboutObservation of Excavation 12.01.2021
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
December 1, 2021
Aspen Glen E3 LLC
c/o Sherman & Howard
Attn: Joe Krabacher
730 East Durant Avenue, Suite 200
Aspen, Colorado 81611
jkrabacher@shermanhoward.com
Project No. 21-7-490
Subject: Observation of Partial Excavation, Proposed Residence, Lot E3, Aspen Glen,
505 East Diamond A Ranch Road, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on December 1, 2021 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 July 22, 2021, Project No. 21-7-490.
The proposed residence will be above crawlspace in the living area with an attached slab-on-
grade garage. Spread footings placed on the dense gravel soil were recommended for the
foundation support.
At the time of our visit to the site, the foundation excavation had been cut in one level from
about one to three feet below the adjacent ground surface. The soils exposed in the bottom of the
excavation consisted of relatively dense, silty sandy gravel and cobbles in the northwestern part
of the excavation (highlighted in yellow on attached plan) and sandy clay in the southeastern part
of the excavation. No free water was encountered in the excavation and the soils were slightly
moist.
The gravel soils exposed in the northwestern part of 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 3,000 psf. Loose disturbed soils should be removed
in the footing areas to expose the undisturbed natural granular soils. It was recommended to
Matt Korus with Peak 3 Construction that the clay soils in the southeastern part of the excavation
be removed and the foundation bearing level be extended down to the natural granular soils. The
bearing soils should be protected from frost and concrete should not be placed on frozen soils.
Other recommendations presented in our previous report which are applicable should also be
observed. We can observe the remaining southeastern part for foundation bearing when dug
down to the gravel soils.
C1DFGHJMPQR123691214171821710161185421BBCEGKLNPQCAD File NameCarcondale, Colorado XSheet No.S-1ofAS NOTEDScaleASPEN GLEN E-3 RESIDENCE
Designed By
Project Manager
Drawn By
TAK
TAK
TAK
Revision
Date
Drawing Code
Project ID
Plot Date
5034 E. Cherry Creek South Drive
Denver, Colorado 80246
303-741-4196
email - Thomas.KingdomPE@gmail.com
Consulting Structural Engineers
KINGDOM ENGINEERING, LLC07.25.21
21-012 seal10.25.211
10.25.21
21-012-P
No.Date
Lot E-3, Aspen Glen, Filing 1
505 E. Diamond A Ranch Rd.
BILDING PERMIT