HomeMy WebLinkAboutObservation of Excavation 04.07.2021ôrr(s*03-2/-b7/7i
lcrt$ffiflffiffifi*
An HrÞloycc Ourncd Compony
5020 Counfy Road 154
Glenwood Springs, CO 8ló01
phone: (970)945-7988
fax: (970) 945-8454
email : kaglenwood@kumarusa.com
www.kur4arusa.com
Ofüce I-ocations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
Apnl7,2O2l
Steve Playton
c/o Russell Cartwright
35 V/illowview Way
Parachute, Colorado 8 I 635
russçcart@email.com
CorresTa nfuaz -oluh1þ 7/¿/-g-z/
{zaftr
Project No. 20-7 13.01
Subject: Observation of Excavation, Proposed Residence, Lot 5, Block 8, Battlement
Creek Village, 168 Meadow Creek Drive, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates observed the excavation at the subject site
on April 5,2021to evaluate the soils exposed for foundation support. The findings of our
observations and recommendations are presented in this report. The services are supplemental to
our agreement for geotechnical services to Steve Playton c/o Russell Carhvright dated January 5,
2021.
We previously conducted a subsoil study for design of foundations at the site and presented our
findings in a report dated February 16,2021, Project No. 20-7-613. The proposed construction is
similar to that discgsseð\our previous report. Spread footings designed for an allowable soil
O"Tnt pressure {t t¡]pf were recommended for foundation support with some risk of
settlement. \_
At the time of our site visit, the foundation excavation which was essentially complete had been
cut in one level from about 2 to 8 feet below the adjacent ground surface. There was minor cut
in the Earage floor slab area. The soils exposed in the bottom of the excavation consisted of stifl
sandy clayey silt. No groundwater \ilas 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 1,500 psf. The risk of settlement is primarily if the bearing soils were to
become wetted and precautions should be taken to prevent wetting. Loose and disturbed soils
should be removed in the footing areas to expose the undisturbed natural soils, and the subgrade
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
Steve Playton
c/o Russell Cartwrigltt
April7,202l
Page2
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.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar &
David A. Young,
DAY/kac
{c¡
r-a
16
Kumar & Associates, lnc. o Project No. 20-7-613.01