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In 1965 construction of the most
advanced primary treatment facilities of the time began at Miller Creek (Map).
Upon the start of operations in 1967, the combined Miller Creek and Salmon
Creek plants were treating over 4 million gallons of sewage a day.
The primary treatment process we were so proud of in 1967 is still the most
efficient of its kind. Yet it removes only the floatable and sedimentary
elements found in sewage, leaving many pollutants to be released into Puget
Sound. |
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Miller Creek was upgraded in 1972
with the provision of chlorine contact chambers while still providing primary
treatment.
In 1985 design began on a secondary treatment upgrade, which became operational
in 1988. Secondary treatment removes at least 85% of the organic material, and
nearly all of the toxics found in wastewater. We now have a primary and
secondary treatment process at both of our treatment plants. |
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| The final phase at Miller Creek, odor scrubbing,
became operational in November, 1991 for both the primary and secondary
treatment processes. Domed covers and a network of fiberglass piping, combined
with an "air scrubbing" process, have made the atmosphere at our
plants virtually odor free. |
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