Marshfield Utilities commission narrows cash-reserve targets, debates investment horizon

Marshfield Utilities commissioners on Thursday discussed revisions to the utility's draft policy on restricted and designated funds, marking progress toward formalizing how the utility will set aside cash, allocate surpluses and manage longer-term investments.

The commission focused first on cash-reserve targets and an annual allocation process that staff proposed, with Nick, Marshfield Utilities general manager, describing an approach that would calculate allocations early each year based on the prior year's ending cash and bring a recommendation back to the commission.

Why it matters: The policy will determine how much of the utility's cash is kept fully liquid for day-to-day operations, how much is held for depreciation, economic development and special projects, and how much can be invested for higher returns. Commissioners said the decisions could affect future borrowing ratings and customers' bills if reserves are misjudged.

Commissioners coalesced around two levels of cash-on-hand: 120 days of liquid cash as a working target and an overall planning guideline around 300 days for funds that can be invested more aggressively. Natasha, commissioner, said she had asked Ehlers whether falling below roughly 250 days could harm credit ratings; staff said consultants had warned that dropping below that level could be problematic for both the utility and the city's borrowing profile.

The draft policy groups balance-sheet items into restricted funds (for example, customer deposits and customer advances for construction, which staff said are regulated by the Public Service Commission) and utility-designated funds (depreciation, economic development, special project funds). Nick described an allocation process that would occur during the budget cycle and would identify when a proposed capital item should pull from a designated fund versus a new-project fund.

Commissioners also debated investment time horizons for amounts above the 120-day liquid target. Staff recommended a five-year maximum maturity for invested funds, and commissioners discussed the trade-offs of longer maturities such as seven or 10 years. "I think 5 years is adequate right now," Nick said, adding that the commission should revisit that limit when the utility has more experience with the policy.

Natasha suggested renaming an internal "cafeteria fund" to a clearer label such as "employee benefit fund" so the public would not assume it is a food service account. Commissioners asked staff to return with concrete proposals on how to size each fund category (depreciation schedules, maintenance funds and the economic development fund) over multiple budget cycles.

Staff noted practical constraints on investments, including limits on certificate-of-deposit placements with any single institution and the need to retain sufficient liquidity as certificates mature. Commissioners asked staff to outline where the economic development fund would be seeded in the annual allocation process; staff said the topic would be addressed in a future meeting.

The commission accepted a set of mostly minor red-line edits to the governance documents and voted to approve those edits; staff will incorporate further changes and return the full policies for final action.

The commission did not adopt a final allocation schedule or change its investment policy at this meeting; instead, members directed staff to refine the draft, provide clearer fund names for the public, and return with more detail on sizing schedules and investment mechanics.