Del Norte System Improvements Applic

• Project Type: Ag/Muni Grant
• Applicant: Town of Del Norte
• Project Name: First Phase Water Improvements Project
• Title: Grant Application
• Date: 11/27/1996
• County: Rio Grande
• Water Conservation - Doc Type: Application

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To reduce water pressure in the lower distribution system, if a separate water supply pipeline is
needed between the existing wells and the lower reservoir. With a separate water supply to the
reservoir, reduction in water pressure in the lower system could be achieved by installing one
pressure reducing valve (PRV) in the pipeline connecting the lower reservoir to the distribution
system. In order to supply high flows for fire protection, it would also be desirable to install one
or more PRY's between major pipelines in the upper and lower distribution systems and between
the wells and lower system.

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Due to the significant variation in the elevation of water users connected to the upper distribution
system, reduction in pressures in this system would require numerous PRY's with many installed
on individual residential service connections. Due to the large number ofPRV's needed to
achieve pressure reduction in the upper system, it appears to be undesirable to pursue this
alternative for this portion of the system. Since it appears practical to reduce the water pressure
in the distribution system serving :1::70% of the total number of users, expected reduction in water
use is likely to be 20% or less. Before construction of improvements to accomplish pressure
reduction is started, a thorough canvassing of existing pressures throughout the distribution
system must be done to verify that proposed reduction of pressures will not cause excessively
low water pressure to any water user.

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Table 4
Cost Estimate for Reduction in Water Pressure

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Item Unit Quantity Unit Price Total Price
12" Dia. PVC Pipe I.f. 2,600 25.00 65,000
Highway Crossing l.f. 100 300.00 30,000
County Road Crossing 1.f. 40 75.00 3,000
10" Pressure Reducing Valve ea. 1 6,000.00 6,000
wlManhole
8" Pressure Reducing Valve ea. 2 5,000.00 . 10,000
wlManhole
10" Gate Valve w/box ea. 4 1,000.00 4,000
8" Gate Valve w/box ea. 4 800.00 3,200
Estimated Total Construction Cost $121,200
Estimated Engineering Fees @ 10% 12,120
Contingency @ 20% 24,240
Estimated Project Cost $157,560

Water Meters

There is a good probability that installation of water meters on individual residential and
commercial water services and charging in accordance with water usage will significantly
decrease wasteful use of water. However, there have been studies that suggest that water users

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