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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Mid-Term Expansion of C~aci(y

If the above short-term improvements (and other improvements which may be identified)
are performed, the existing WTP may be rated from 1.3 to 1.5 MGD. The remaining 1.0 to 1.2
MGD must be supplied by an expansion of treatment facilities. The required capacity could be
supplied by an expansion of the existing WTP or a peaking facility. This peaking plant would be
located near the St. Vrain Canal and Highway 36. Refer to Figure 7. Issues to be considered in
the decision to build a peaking facility are: delivery for raw water from both the river and the
canal, pumping requirements and operating costs, comparisons of overall capital and operating
costs, standby power and overall system reliability (including the redundancy of treatment
facilities offered by a new WTP). The construction of a packaged 1.0 to 1.2 MGD peaking
facility east of town is feasible and should be assessed.

Conceptual cost to design and build a WTP similar to the peaking plant described above,
excluding costs for land and legal services, is about $1.13 million.

8.3 Water Storage and Distribution

Chapter 4 and Section 4.3 discuss the performance and the needs of the storage and
distribution facilities. The existing system has reached its capacity to provide adequate storage
and meet maximum day flow requirements. It has significant deficiencies for fire protection,
especially in the upper pressure zone.

In summary, the following improvements are proposed:

1. Add a storage tank and associated piping improvements for the upper pressure zone at
the same hydraulic grade line as the existing storage tank in the high pressure zone.
Preliminary location for this facility is above the Russell Subdivision. The existing 0.35
MG tank could be moved to satisfy this requirement.

2. Add a 1.0 to 1.5 MG storage tank and associated piping improvements 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 at the same hydraulic grade line as the water system
at the PRY at 68 psi.

3. Begin a replacement program for 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.

4. Upgrade a portion of the distribution system in the main part of town to connect the
existing PRY to the proposed Lyons Valley Park tank with 12-inch diameter pipe. The

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