PROJ00540

• Contract/PO #: C153697
• Contractor Name: Norwood, Town of and Norwood Water Commission
• Contract Type: Loan
• Water District: 60
• County: San Miguel
• Bill Number: FSL
• Loan Projects - Doc Type: Feasibility Study

V-17

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Gurley Reservoir for operation of the headgate.
A major concern of Far~ers Water is that water
levels will be too low!during the winter for a
pump system to function. If the pipeline
Alternative appears tOibe the most feasible, it
will be necessary to investigate this problem
more thoroughly duringithe coming winter.

c. PiDeline Routina. There are three options for
the pipeline route: 1) down Gurley Canyon, 2) on
the west side of Gurley Canyon on Oak Hill, and
3) on the east side of , Gurley Canyon (Figure
V-D). Gurley Canyon is the most direct but is
very rough and install~tion costs would be high.
Both the west side route and east side route
appear to have approxi~ately the same length and
cost. The west side rQute could be utilized in
conjunction with a future water treatment plant
to serve growth on Oak Hill. The east side route
could possibly make use of the old Nelson Ditch.
Total length of the pipeline would be 24,000
feet.

d. PiDeline Desian For Do~estic Flows. Major
factors to consider in'pipeline design are pipe
diameter, pressure rating, type of material, type
and number of valves, burial depth, bedding
requirements, and type and number of air vents.
Future average day winter flows are 20S gpm;
summer flows will be 2~4 gpm. The elevation drop
from Gurley Reservoir to the Town reservoir is
800 feet, which is equivalent to 344 psi. with a
total pipeline length 9f 24,000 feet, the average
slope would be 3.3 feet per hundred feet.

A minimum 6 inch pipe is recommended. Pipe
capacity with a headlo~s of 3.3 feet per hundred
feet is 650 gpm flowing full. The pipe will
operate entirely on gravity flow, with pumping
into the upper end fro~ the reservoir.

The pipeline can be de~igned to flow as a
pressure pipe or open channel (non-pressure)
pipe. If it is a pressure pipe, the pipe must be
able to withstand pressures as high as 344 psi at
the lower end. Ductile iron pipe or steel pipe
with adequate wall thickness will be needed. If
a open channel system ~as used, it may be
feasible to use Class ~OO PVC pipe; however,
since extra bedding will be needed, the cost is
sometimes equivalent t9 DIP.
The pipe would operate under atmospheric pressure
only (open channel flow) if flow is restricted at
the upper end to less than pipe capacity and by