PROJ00470

• Contract/PO #: C153477
• Contractor Name: Victor, City of
• Water District: 0
• County: Teller
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Contract Documents

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bor~holes, relatively undisturbed samples will be obtained using
thin-walled Shelby tubes. All of the samples obtained will be
visually inspected, logged by an experienced geotechnical
engineer, identified and sealed for transport to ou~ laboratory
for detailed examination and testing.

After bedrock is encountered in each of the two vertical holes,
rock coring will be performed in NX size to a nominal depth of

20 feet into bedrock. All
inspecteJ, logged, and placed

core obtained will be visually
in core boxes for preservation.

In addition to the sampling and coring during drilling of the two
vertical holes, in-situ permeability testing will be performed
beneath the phreatic surface, Constant pressure injection
testing will be performed at selected depths by inflating a

single packer near the bottom of the casing.

Water will be

injected under a known pressure from beneath the packer and flow
rates will be measured in order to determine the permeability of
the embankment materials and underlying bedrock.'. We anticipate
performing a total of four in-situ permeability tests, with each
boring having a test performed in the embankment materials and
underlying bedrock.

After completing the drilling and permeability testing, multiple
standpipe piezometers will be installed in each of the two
vertical er.Jbankwent borings. The piezometers will consist of
3/4 inch PVC pipe, capped at the base and slotted along the
bottom 3 feet of pipe, Three pie:::orneters will .be installed
within each of the two holes at selected depths determined at the
time of installation. We anticipate to backfill the piezometers
with coarse-grained cuttings from the borehole. Bentonite balls
will be used to seal each piezometer to a thickness of at
approximately 1 foot above the sand.