C153349 Feasibility Study

• Contract/PO #: C153349
• Contractor Name: Brook Forest Water District
• Contract Type: Loan
• Water District: 9
• County: Jefferson
• Bill Number: SB 80-67
• Loan Projects - Doc Type: Feasibility Study

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1n diameter for a number of reasons. The 6-inch diameter size is more readily

available, does not freeze as readily, and has greater capacity for fire flows.

Although replacement of mains is recommended only in selected areas and does

not provide continuous loops of 6-i~ch lines, it is believed that the larger

size is a better long term design.

An alternative to lower mains io freezing areas in the installation of

heating cable (short term solution). The district has previously purchased

approximately 5000 feet of mineral insulated electric heating cable for this

purpose. Approximately 100 feet of the cable has been installed as of October

1979. The cable is installed inside the pipe by feeding it between drilled

taps as much as 500 feet apart. Suppliers have indicated that satisfactory

results have been achieved in other mountain communities usi~g this product.

Installation of heat cable has been recommended in certain areas to use the

current cable supplies and to reduc~ the costs associated with lowering the

mains if s~ch installations are pro~en to be effective frOtl1 results obtained

during the 1979-80 winter season.

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The location of valves in the d~stribution system has ca~sed problems when

line breaks occur. The spacing of ~alves in parts of the system is as great as

2400 feet ~hrough high service areas. This leaves many residents without water

during the time that it takes to repair the line. It is recommended that addi-

tional valves be added to provide a maximum spacing of 1200 feet between valves.

Valves are also needed at several intersections to provide access for repair of

one line and still allow the other lines to function in the distribution system.

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Several 4" diameter lines in the system have been constructed that do not

loop back into the system, thus creating dead ends. The only flow that will

occur in these lines is the water that each active tap would use. This may

cause freezing that otherwise would not have occurred with more water movement

in the lines. Also, the line could cause a health problem if the water should

become stagnant. Constant circulation of water in the system will greatly

solve both of these potential problems. It is recommended that circulation at

these dead ends be achieved by one of two methods:

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I. Extend the dead end to tie back into the system at another point.

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2. Install a small pump at the dead end to pump a small amount of water

back along the dead end line via a recirculating tube. The recircula-

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