BOARD02132

• Board Meeting Date: 5/30/1991
• Description: Agenda or Table of Contents, Minutes, Memos. Not All Materials Are Included.
• Board Meetings - Doc Type: Meeting

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Source: City of Steamboat Springs
Public Works Project Summary

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City of Steamboat Springs
Infiltration Gallery
CWPRA Application
April 15, 1991

PROJECT SUMMARY

In response to peak summertime water demands and a need for a
point of redundancy in the City's water supply system, the City
of Steamboat Springs has contemplated a Yampa River infiltration
gallery since the early 1980's.

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In 1987 reports were compl&ted, copies of which are attached,
which presented conclusion$ regarding suitability of the proposed
site and presented different construction alternatives. The
preferred alternate was to construct 1,000 linear feet of
infiltration gallery, pump the raw water across the Yampa River
to the site of Mount Werner Water and Sanitation District's
wellfield and booster station, and utilize their facilities, with
some necessary improvement$, to treat and pump the City water.
The last component of the preferred alternate was construction of
2,300 linear feet of treat&d water main which connects the Mount
Werner distribution system with the City's. In this way Mount
Werner's distribution syst&m is used to transmit the City water.
Another alternative includ&d the City gallery operating
independently from Mount W~rner, including separate treatment and
pumping facilities. This alternate was more costly and thus not
preferred.

Improvements to the Mount Werner booster station include
providing additional pumping capacity and expanding clearwell
capacity in order to provide adequate disinfection. In addition,
because the Mount Werner distribution system operates at a
slightly lower pressure, 16 psi (pounds per square inch), it is
necessary to increase pumping heads in order to connect the two
distribution systems.

The gallery is expected to have a sustained yield of 1.4 million
gallons per day.

Property acquisition was completed in 1990 on a site adjacent to
and on the south side of the Yampa River from the Mount Werner
wellfield.

Design work began in September, 1990.

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Construction is scheduled to take place in three phases. The
first phase is construction of the gallery and the raw water main
to Mount Werner's booster. In order to construct with groundwater
as low as possible, the first phase of construction began in
February. The first phase should be complete in May. The second
phase is the construction of the treated water main to connect
the. two systems. The construction of this phase has been bid and
awarded and construction Should be completed by the end of May.