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Graham staff pitches $30–$60 million pipeline and treatment plan to tap Possum Kingman Lake
Summary
At a special called meeting, city staff presented a feasibility concept to draw raw water from Possum Kingman (PK) Lake to supplement Lake Graham, estimating capital costs at roughly $30–$60 million (staff midpoint $45 million) and recommending $250,000 in FY26 for a feasibility study; council requested more data and took no formal vote.
City staff presented a conceptual plan Wednesday to pipe raw water from Possum Kingman Lake into Graham’s water system as a long-term supplement to Lake Graham, outlining engineering options, treatment challenges and a preliminary funding approach but receiving no vote from the council.
In a presentation described as a workshop, a staff presenter noted the city currently holds a reservation for about 1,000 acre-feet per year from PK — roughly 893,000 gallons per day — and said staff had identified a range of capital costs to construct intake, pipeline, treatment and storage systems between $30 million and $60 million, with a working midpoint estimate of about $45,000,000. "Water is probably, if not the most, one of the top priorities that we need to be looking at in the city," the presenter said.
Staff described three broad alternatives: (1) rely more on well fields, which can provide groundwater with different treatment needs but risk…
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