C153773 Feasibility Study

• Contract/PO #: C153773
• Contractor Name: Morrison, Town of
• Contract Type: Loan
• Water District: 9
• County: Jefferson
• Bill Number: HB 95-1155
• Loan Projects - Doc Type: Feasibility Study

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Reservoir to serve all of Morrison. Alternatives evaluated under this subsystem include: (1)
maintaining the existing plant and expanding it, (2) abandoning the existing plant and
constructing a new plant near Cooley Reservoir, or (3) ultimately use two plants by maintaining
the existing plant site and phasing in a new plant to primarily serve the higher development south
of Town.

The distribution system covers piping and appurtenances for delivering treated water. This
includes all transmission and dual purpose piping, pump stations and storage tank(s) necessary
to deliver potable water to the users of the system. New finished water mains, storage tanks,
booster stations and pressure zone design are evaluated under this subsection. The existing
200,000 gallon storage tank is inadequate to meet the future water requirements of Morrison and
additional tank(s) will need to be connected to the system. Mount Carbon's existing 1.0 million
gallon above-ground steel water storage tank may eventually be connected to the Morrison water
system - which could provide some of the additional treated water storage needed.

A. WATER SOURCE

From a cursory review of the service study area (Drawing I-A), it is evident that Morrison does
not have, and cannot reasonably obtain, water to support "build-out" development of this entire
service area. Thus ultimate development of the Morrison Service Study Area will probably be
limited by the availability of an adequate water source.

Ultimate Service Capacity
The computer operations model analyzes demand, direct flow water rights, storage water rights,
return flow obligations, reservoir storage, evaporation and seepage losses, and flow rates. The
model includes the limitations imposed upon Morrison's water rights in the augmentation plans,
such as monthly, annual and 10-year limits on diversions. The model further assumes no free
water available on Bear Creek and water can only be diverted under priority. The model
concludes Morrison can allow up to 1,290 EaR to be served by the municipal water system with
450 acre-feet of storage in Cooley Reservoir (90% of the total 500 acre-feet stated in the
Agreement) and 29 acre-feet of storage in the Morrison Operating Reservoir. This is based upon
the existing water rights portfolio and assuming Morrison elects to use the 3.125 shares in the
Warrior Ditch for storage rather than direct diversion. (Morrison must make a permanent
decision by March 1, 2000 to use these rights directly or for storage as required by Case Nos.
82CW425 and 87CW301. With physical storage available in Cooley Reservoir by the year 2000,
it will be in the best interests of the Town to elect to use these rights for storage.)

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