C153514 Feasibility Study

• Contract/PO #: C153514
• Contractor Name: Farmers Water Development Company
• Contract Type: Loan
• Water District: 60
• County: San Miguel
• Bill Number: SB 87-15
• Loan Projects - Doc Type: Feasibility Study

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4. A 20-ft long section of concrete lined tunnel similar to
that described above; and

5. A 225-ft long section of 32 inch by 37 inch steel oval
pipe with flow area equal to approximately 7.0 sq ft.

The configuration of the existing outlet works facility is shown on
Figure 5. The mechanically operated slide gate in the 30-inch steel
pipe was apparently installed during one of the very early stages
of reservoi r constructi on, whil e the gate located on the intake
structure was probably installed during the 1947 embankment raise.
The intake gate is currently utilized for controlled discharge with
the capabil ity to act as a shutoff valve for maintenance purposes
of the outlet works.

The current condition of the outlet works is variable. The
intake structure appears to be in satisfactory condition generally,
although detailed inspection of this structure was difficult due to
the presence of the trash rack, gate, stem and hydraul i c cyl i nder.
The gate and cyl iner still operate reasonably effectively although
the gate seats leak and the cylinder bolts are in danger of rusting
through. The mechanical and hydraulic equipment is believed to be
about 40 years old. If so, this equipment is probably approaching
the end of its effective operating life.

The condition of the 150-ft long and 20-ft long concrete lined
tunnels ranges from generally satisfactory with few signs of
deterioration or distress to generally unsatisfactory. Sections of
the concrete tunnel floor have spall ed and/or eroded and are now
uneven and of unknown thi ckness. Ci rcumferenti a 1 and 1 ongitudi na 1
construction joints, some of which are visibly deteriorated, are
common in many locations. Poorly consolidated, "vuggy" concrete is
not common, but does exist in a few locations, typically on tunnel
sidewalls. Cylindrically shaped weepho1es occur at a number of
locations in the tunnel sidewalls and roof, and connect through the
concrete tunnel 1 i ner to the surroundi ng foundati on ma teri a 1 s. The

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