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ISG briefs Eldridge board on water‑treatment options, hydraulic model and tank work
Summary
ISG consultant Lenny Larson told the Eldridge Electric & Water Utility Board the city’s hydraulic model shows generally adequate pressure and outlined next steps on treatment options, tower recoating and a potential new well; staff will continue talks with Iowa American Water.
Lenny Larson, a consultant with ISG, told the Eldridge Electric & Water Utility Board that preliminary discussions with Iowa American Water have begun to explore how the community might receive treatment services — either as a wholesale arrangement or by having the company serve customers directly. Larson said the work is still in a preliminary stage and that he will deliver supporting documents to the board soon.
"They were happy with the results they got. The city has good pressure in town," Larson said, summarizing findings from recent hydraulic testing. He reported system pressure typically in the 50s PSI, dipping into the mid‑40s in a few legs and rising to 60–80 PSI in southern portions of town. The modeling results will inform efforts to reduce water age in low‑flow areas and to better manage tower levels.
Larson outlined capital improvement projects already on the water CIP that will be part of the next phase: clear‑well improvements, a chlorine room upgrade and a new well. He said work on the city’s water tower is under way, with surface preparation and sand‑blasting planned now and coating/painting work expected to begin in October with contractor oversight to verify proper bonding and coating thickness.
On tank mixing, Larson said video evidence shows the mixer is functioning but may not be achieving ideal circulation. "One of the things I'm going to look at is the mixer...to see what it would cost to increase the size of [the mixer]," he said, and noted staff would present cost information if an equipment change were recommended.
Why it matters: the board must balance near‑term treatment decisions, ongoing capital projects and system operations as Eldridge plans for growth in the southern industrial area. Staff said once the hydraulic model report is finalized they will meet with city staff to develop an action plan and present options to the board.
