Expansion of water treatment plant estimated at $33 million

ABERDEEN, S.D. (aberdeennews.com) – A costly expansion of the city’s water treatment plant is one of multiple recommendations made by a regional engineering company.

HR Green this week presented a list of improvements that are needed at the city’s water treatment plant, including the eventual expansion of its treatment capacity in 2026. That comes an estimated cost of $33 million.

The last major improvements to the city’s water treatment plant were made in 2005. At a cost of about $15 million, the work improved the water treatment process, but didn’t expand treatment capacity, which is about 10.5 million gallons per day.

Mark Hardie, an HR Green engineer, gave an overview of recommended improvements during Monday’s city council meeting. They include annual improvements starting this year with expansion and a new filter and ozone treatment area in 2026. That would increase capacity to 18 million gallons per day.

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