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Potable Water System Master Planning and Implementation
City of Ontario, Oregon
OVERVIEW
Keller Associates developed a complete GIS system for all of the
City’s potable water, sanitary sewer, and storm sewer facilities.
Utilizing this GIS database, comprehensive detailed utility master
plans were then developed for each of these utilities. Our services
included implementation of the key elements of the potable water
system master plan, including (1) a 3.0 MG steel reservoir located
on the bench northwest of town to provide gravity flow to the City;
(2) conversion of two pressure zones to one pressure zone, (3) 2.5
miles of 24-inch transmission pipelines, (4) miscellaneous distribution
system pipelines, and (5) a new 4.0 MGD water filtration plant. Keller
also designed a SCADA control facility to operate three major booster
pumping facilities from the new 3.0 MG bench reservoir.
CHALLENGE
Over half the water used in the City of Ontario goes to the Heinz
Food Processing plant, which requires a continuous uninterrupted
water supply (5.12 MGD). The State Correctional Facility also expanded
to over 3,000 beds, requiring an additional 0.8 MGD of potable water.
The existing plant was rated at 8.0 MGD, but on some peak summer
days was required to process up 10.5 MGD. The existing facility draws
raw water from the Snake River, which is contaminated with extremely
high sediment during spring runoff and high concentrations of algae
in late summer.
SOLUTION
Through the master planning process, Keller Associates developed
unique concept solutions addressing each of the City’s potable
water system challenges. Keller Associates was subsequently retained
to design and implement each of the concepts. The lack of potable
water filtration treatment capacity and the periodic poor raw water
quality from the Snake River was resolved with construction of a
new parallel 4.0 MGD water filtration plant and a new raw water intake
facility that collects and conveys raw water from a nearby abandoned
gravel pit pond. The uninterrupted water supply pressure problems
and controls were resolved with construction of the new 3.0 MG bench
reservoir and transmission pipelines direct to the City and Heinz
Foods processing plant. All facilities are controlled by a new SCADA
control system operated from the new bench reservoir, thus eliminating
the need for two separate pressure zones. |
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