PROJC00189

• Contract/PO #: C150006
• Contractor Name: Palisade, Town of
• Contract Type: Loan
• Water District: 72
• County: Mesa
• Bill Number: HB 95-1155
• Loan Projects - Doc Type: Feasibility Study

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Dia. or Year
Segment Description Width Length Material Installed
1 Cabin Reservoir Outlet Pipe 30 in. 584' Concr. 1983
2 Cabin Reservoir Outlet Box 7 ft. 6' Concr. 1983
3 New pipe below outlet box 12 in. 170' DIP 1983
4 Old pipe to Kruzen Spgs. box 6 in. 1730' CIP 1950's
5 Kruzen Springs box 4 ft. 10' Concr. 1950's
6 Kruzen Spgs. to 'mid-point' 6 in. 11,000' CIP 50's
7 'Mid-Point' to Wye 8 in. 11,000' CIP 50's
8 Wye to WTP 12 in. 5225' DIP 1989

The entire pipeline will be analyad. However, it is probable that only
segments 4 - 7 will require replacement.

nenernl Factors which must be considered in the analysis are 1) there are
additional diversion points below Cabin Reservoir, 2) the pipeline has two in-
line concrete boxes, and 3) effect of variable slopes on pipeline capacity (when
flowing partially full).

Multiple Diversion Points The pipeline presently takes water from 3 separate
locations: Cabin Reservoir, which is at the upper end of the pipe, and two in-
line diversions: the Kruzen Springs pipeline; and a direct diversion out of
Cottonwood Creek. The pipeline must be designed so water can flow freely
from each diversion into the pipeline in a manner that prevents surcharges and
allows flow measurement.

Tn-T ,ine Stmctmes. The outlet pipe from Cabin Reservoir enters into a open
concrete structure, with a 30 inch pipe coming in and a 12 inch pipe exiting.
Below this, the pipelines from Kruzen Springs and from Cabin Reservoir
connect together at a concrete tank. Each pipe segment below a box must be
analyzed separately. This is to assure that no surcharging occurs in each
concrete box, and also, to account for both inlet control and outlet control on
the pipe section (box plus pipe). Inlet control is the head needed to force a
certain amount of water out of the box into the pipe. Outlet control considers
the entire pipeline segment, including inlet losses, pipe losses and outlet losses.

In-line fittings are evaluated as a section of pipe. At the diversion point on
Cottonwood Creek, the diversion pipeline connects to the main pipeline at a tee
or wye joint. The main factor to consider here is to be sure the pipe does not
flow full, which would prevent the side stream from entering.

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