HomeMy WebLinkAboutB13-0034 open hole report ``LI�' ;_ Engineering, Inc.
CIVCLJGEC?TBCI-�N ICAL
May 23, 2013
Mr.Alan Styers RE: Open Hole Observation-Unit B
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, on May 22, 2013,we visited the construction site for the proposed new duplex
residences on Lot 10, Block 2, Vail Village Filing No. 12, 3080 Booth Falls Court, East Vail, Eagle
County, Colorado. The purpose of our site visit was to observe the soils exposed in the foundation
excavations for proposed South Unit of the duplex,Unit B, and compare thein 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, and a"U" shaped trench on the south part of the
unit. The excavation cuts, ranged from about three feet on the southeast corner to about 10 feet between
the two units. The soil exposed in the foundation excavation consisted of reddish-brown, silry to clayey,
sandy gravel with cobbles and boulders.
The soil exposed in the excavation was consistent with the findings and recoinmendations of the
above-named soil's report. The soil exposed in the foundation excavation for the proposed Duplex B (the
south unit) is suitable for the designed mcrximum allowable soil bearing pressure of 3000 psf.�
There was standing water on the upper, large bench of the excavation for the south unit from the
rain the night before. We talked with Tere Nottingham that they will either wait for the water to dry out
until the subgrade is firm or remove the soft and wet soil. Also there was one spot on the east trench
where they had removed a boulder(about 2 foot diameter) and had backfilled the hole with loose soil.
This area wi11 have to be compacted in lifts or filled with lean concrete.
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. Signs of fluctuating ground water were observed in the southwest corner of the
excavation for the south unit. The foundation walls on the south half of the excavation should be
waterproofed in addition to the periineter drain. If there isn't a sufficient slope to discharge the drain to
daylight a sump with a pump should be constructed.
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-UnitB.wpd
P.O. Box 2837, Edwards, CO 81632 Tel: 970-926-9088