PROJ00020

• Contract/PO #: C153567
• Contractor Name: Grand Junction, City of
• Contract Type: Loan
• Water District: 72
• County: Mesa
• Bill Number: SB 89-85
• Loan Projects - Doc Type: Feasibility Study

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of these improvements follows in Chapters 4 and 5.

3.3 DIVERSION ALTERNATIVES

The need to divert North Fork water to Juniata Reservoir stems from the fact
that the Juniata Reservoir is an off stream facility situated in a relatively
small drainage basin between the North Fork and main stem of Kannah Creek.

Physical constraints indicate that only two primary alternatives be considered
for diversion alignments, as follows, with the capability of diverting 28.37
cfs in either case.

If
30
Alternative A. This alternative would utilize anew jt{. pipeline following
the existing City Pipeline alignment for approximately 2050 feet. At that
point the new pipeline would then turn southeast on a direct heading for
Juniata Reservoir, terminating just west of the spillway as shown on Figure 3-
2. This alternative would involve the following modifications to the existing
structures:

1. The existing diversion structure incorporates a concrete wall intersecting
the stream bed, a 24" headgate supplying water to the City Pipel ine, and
an overflow weir to pass streamflow in excess of the headgate capacity.
In order to increase diversion capacity to 30 cfs, this head gate would
have to be enlarged to 36". This would also involve replacing a portion
of the concrete headwall.

2. The headgate discharges to a 32 foot section of 24" corrugated metal pipe,
which in turn discharges to an open ditch (unlined). This section of pipe

3-3