C153379 Feasibility Study

• Contract/PO #: C153379
• Contractor Name: Brook Forest Water District
• Contract Type: Loan
• Water District: 9
• County: Jefferson
• Bill Number: SB 80-67
• Loan Projects - Doc Type: Feasibility Study

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TABLE III-2
SUMMARY OF BORING PROGRAM
Approximate Total
Boring Ground Elevation1 Depth
Boring No. Location (Feet) (Feet)
C-l Dam Axis 4583 60.0
C-2 Dam Axis 4560 77 .5
C-3 Dam Axis 4485 68.0
C-4 Dam Axis 4525 127 .5
C-5 Dam Axis 4550 80.0
B-1 Upstream of Axis 4540 81.0
Right Abutment
B-2 Upstream of Axis 4555 66.0
Right Abutment
B-3 Upstream of Axis 4530 72.5
Left Abutment
B-4 Upstream of Axis 4510 70.5
Right Abutment

lElevations interpolated from the USGS 7.5 minute, Dearfield, Colorado,
quadrangle map. All elevations are relative to Mean Sea Level (MSL) based
on USGS datum.

c. Backhoe Test Pits

Test pits were excavated using a tractor-mounted backhoe to explore

the potential borrow materials at the location shown on Figure 111-3.

The test pits ranged in depth from 4 to 12 ft. Excavation and logging of

many of the test pits were hampered by a very shallow depth to the water table

and the granular nature of the soils.

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The test pit exploration program was conducted and supervised by an

experienced geotechnical engineer. A continuous log of the materials en-

countered was recorded and the soils were classified according to the Unified

1II-13