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Potable Water System Master Planning and Implementation
City of Nampa, Idaho
OVERVIEW
Over the past ten years, the City of Nampa has grown from a population
of approximately 40,000 to over 65,000 people. As a result of this
tremendous growth, the City of Nampa has had to expand master planning
efforts and implement numerous projects in order to meet the potable
water system demands. Commensurate with the ongoing and continuous
master planning efforts, numerous implementation projects have been
required, including new water supply wells, transmission lines, booster
stations, storage reservoirs, SCADA control theory development, radio
SCADA monitoring and controls, and new pressure zone development.
CHALLENGE
The terrain in the City slopes gradually upward from northwest to
southeast, with a significant rise in the northeastern portion of
the city. This elevation difference created a significant variation
in water pressures in different areas of the City. Another challenge
facing the City was that their water system was supplied by 10 wells
plus one small (500,000 gallon) elevated water storage reservoir,
all operated manually. This created a significant operation and maintenance
problem for the City because of its manpower-intensive requirements.
Significant growth presented tremendous coordination challenges between
all of the developments demanding water service, and created the
need for significant administration, management, and planning efforts.
SOLUTION
Keller Associates, in association with the public works department,
has continually upgraded the City’s water master plan (utilizing
WaterCAD computer modeling techniques), and has recommended, designed,
and implemented major water system improvement projects. These efforts
have allowed the City to continue providing potable water service
for rapidly growing areas as well as automating their previously
manual system operation. Keller Associates has completed the design
of numerous 2,000-gpm well pumping facilities with automatic standby
power, variable frequency drive pumps, and SCADA controls. Also,
major water transmission lines and interconnecting pipelines with
control valves have been installed to create a separate new pressure
zone on the south and east sides of the City, allowing continued
City growth in these areas. A city-wide potable water system SCADA
control theory and radio-controlled monitoring and operation system
was also designed and installed under Keller’s supervision.
This SCADA system now monitors and automatically controls the storage
reservoir water level, 15 well pumping facilities and three booster
pumping stations. |
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