PROJ00156

• Contract/PO #: C153721
• Contractor Name: Lyons, Town of
• Contract Type: Loan
• Water District: 5
• County: Boulder
• Loan Projects - Doc Type: Feasibility Study

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b. Any development within the high pressure zone will require additional storage, or
significant modifications to the existing distribution system, to meet fire flows. If only
improvements were made to the existing system, there would still be a single feed to
the upper pressure zone.

5.3 Recommended Storage and Distribution Improvements

The following improvements address both current needs and future needs. The Town
must consider each element in the water distribution system in terms of its adequacy, and the
time and money required to improve or replace it. The inability to deliver adequate fire flows
to certain portions of town requires immediate attention. In the near future, development in
and around Lyons will require the infrastructure to support it in the form of increased storage,
and the ability to deliver greater supplies of water to residents.

Water Storage

1. Add a minimum of 0.18 MG of new storage for the high pressure zone above the
Russell Subdivision. This tank should be sized for fire protection; space could be
added to provide reliability for the maximum day requirement. The hydraulic grade
should be set to the existing 1.0 MG tank near the WTP. The existing 0.35 MG tank
could be moved to satisfy this requirement. Adding this additional storage would
provide storage for the upper pressure zone should there be a break in the 12 inch
transmission line to town.

2. Add a 1.0 to 1.5 MG tank for the lower pressure zone. This tank should be located
south of town in the vicinity of the proposed Lyons Valley Park south of the town.

Water Distribution System

1. The new tank in the upper zone will need approximately 1900 feet of 12 inch pipe.

2. In general, we recommend replacement of all water lines that are less than six
inches in diameter with 8-inch lines. In addition, we recommend looping of water
mains to and within all future developments. This investment will greatly improve fire
flows in the main part of town.

3. The line connecting the PRY and the proposed 1 MG tank south of town should be
upgraded to a 12 inch line. This will require replacing approximately 1550 feet of 4
inch pipe, 450 feet of 6 inch pipe, and 300 feet of 8 inch pipe. There is currently
about 550 feet of 12 inch pipe in Fourth Avenue between Railroad Avenue and High
Street that will be utilized. The existing 12 inch line in 2nd Avenue (by the High
School) will need to be extended about 1200 feet to the proposed new tank).

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