Minnetrista City Council weighs water-treatment plant designs, financing and rate options

Minnetrista City Council held a work session Feb. 3 to review design, cost and financing options for a proposed water treatment plant intended to expand capacity and provide redundancy for the city’s southern water system.

Council members and city staff focused on three primary design options presented by staff: (1) a full concrete gravity filter plant with a roughly 600,000‑gallon below‑grade clear well and about 2,200 gallons‑per‑minute (gpm) treatment capacity (the project staff has generally budgeted at approximately $26.3 million); (2) a gravity steel‑filter option that would retain a clear well but reduce construction cost relative to full concrete filters; and (3) a pressure‑filter option without a separate clear well that would reduce upfront cost but likely require earlier construction of an elevated storage tank (water tower) to meet future storage and peak‑hour needs.

Why it matters: the project is large enough to affect utility rates, billing practices and long‑term city finances. Staff and council discussed whether to seek state bonding and how state funding conditions (including prevailing‑wage requirements) could change project costs; they also explored rate structures such as a dedicated debt service line item on utility bills, monthly billing, and tier spreads intended to influence customer water use.

Key details and discussion points

- Project scope and cost estimates: Staff described the “Option 1” concept (concrete gravity filters plus a ~600,000‑gallon clear well) as the baseline the…