HomeMy WebLinkAboutB13-0033 open hole report ``LI�' ;_ Engineering, Inc.
CIVCLJGEC?TBCI-�N ICAL
May 16, 2013
Mr.Alan Styers RE: Open Hole Observation-Unit A
Styers, Inc. Lot 10, Block 2, Vai1 Village Filing No. 12
P.O. Box 678 3080 Booth Fa11s Court,East Vail
Snowmass CO 81654 Eagle County, Colorado
Project No. 12059
Dear Alan:
At your request,today, May 16,2013, we visited the construction site for the proposed new
duplex residences on Lot 10, Block 2, Vail Village Filing No. 12, 3080 Booth Fa11s Court,East Vail,
Eagle County, Colorado. The purpose of our site visit was to observe the soils exposed in the foundation
excavations for proposed North Unit of the duplex,Unit A, and compare them with the findings and
recommendations of the Soil and Foundation Investigation Report, under the same project number, dated
October 13, 2012.
The excavation consisted of one large bench,trenches and holes for isolated footing pads
stepping into the site. The excavation cuts, ranged from about three to about 8 feet below the existing
grade. On the south side of the excavation for the north unit,there was about an eight-foot step down to
the foundation excavation in progress for the south unit. The soil exposed in the foundation excavation
consisted of reddish-brown, silty to clayey, sandy gravel with cobbles and boulders, except one trench on
the south side of the excavation near the southwest corner. This trench was about twenty feet long and
about 4 to 5 feet wide. The soil exposed in this trench was still in topsoil, and Tere Nottingham(the
excavator) said that they will take it down about 2 feet,to the suitable soil exposed in the other trenches.
The soil exposed in the excavation was consistent with the findings and recommendations of the
above-named soil's report. The soil exposed in the foundation excavation for the proposed Duplex A (the
north unit) is suitable for the designed mcrximum allowable soil bearing pressure of 3000 psf.� Soft spots
were not reported.
We also, recommend compliance with the recommendations of the above-named soil
report during the remainder of the construction, specifically with the sections on drainage,
grading and irrigation. Ground water or signs of fluctuating ground water were not observed in the
excavation for the north unit. Based on this infarmation, the foundation perimeter drain detail in the soils
report, combined with standard foundation waterproofing and one foot of gravel backfill behind the
foundation walls can be used for Duplex A..
This report has been prepared according to locally accepted Professional Geotechnical
Engineering standards for similar methods of testing and soil conditions at this time. The findings and
recommendation stated above are based on the soil conditions observed and tested in the foundation
excavation only. There is no other warranty either expressed or implied.
If you have any questions,please do not hesitate to call.
Sincerely,
LKP Engineering,Inc.
Luiza Petrovska,PE
J:\ WP X4-LKP\2012\12059open-UnitA.wpd
P.O. Box 2837, Edwards, CO 81632 Tel: 970-926-9088