PROJ00166

• Contract/PO #: C153311
• Contractor Name: Nunn, Town of
• Contract Type: Loan
• Water District: 0
• County: Weld
• Bill Number: SB 78-69
• Loan Projects - Doc Type: Feasibility Study

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The required storage capacity to. balance supply and demand on a daily
basis is about 15 to 20 percent of the average daily consumption, For Nunn,
the storage capacity needed to balance supply and demand is about 12,000
gallons (i,e.,N 15% of future average daily demand). The total of the above
amounts to 152,000 gallons of storage, However, it was concluded that the cost
of an additional 102,000 gallons of storage capacity would place too much
of a financial burden on the Town in addition to the other capital costs
associated with the water source problem and other system improvements,
and therefore an additional 50,000 gallons of storage capacity is recommended
for future system improvements.
3. Operation Evaluation
,The present distribution system is an open-loop system with
distribution lines ranging between two inches and four inches in size
except for a short length of 6" line from the storage tank to the four
inch line in Logan Street (refer to Figure III-I), It is normally good
practice to have at least four and preferably six inches as a minimum for
distribution mains.
The evaluation of the distribution system was performed using a computer-
ized calculation routine for the Hardy Cross Method of analyzing distribution
systems. The system was modeled using the maps of the pipelines prepared
for the Town (see Figure III-I) and the peak hourly demands presented in
Table 111-2. The system was checked for several conditions, including the
present and projected peak hourly demands, fire flow demands, and finally
with improvements such as closing open,-ended loops.

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