St. Charles continues public review of IMEA power sales contract; council seeks more analysis before deciding

City of St. Charles staff and councilors spent the meeting’s longest block of time reviewing whether the city should sign a new 20-year power sales contract with the Illinois Municipal Electric Agency that would take effect in February 2035 and run through February 2055. Staff emphasized the offer is a new contract, not an extension of the existing agreement, and members of the public and several council members urged more study before any commitment.

The city’s presentation, delivered by a public works staff member identified in the meeting as Peter, summarized IMEA’s role as a joint-action agency that supplies wholesale power to municipal utilities, outlined IMEA’s recent additions of solar capacity and its stated decarbonization target, and described the timeline IMEA has set for communities to sign up during an open opportunity period that closes April 30, 2025.

Why it matters: the decision would shape where the city buys wholesale power for decades, affect the municipality’s carbon profile and long-term exposure to generation costs, and could influence regional generation owners such as the Prairie State generating facility.

What staff said

Peter told the committee St. Charles has been an IMEA member for decades and that IMEA supplies wholesale electricity and transmission services to the city. He said IMEA’s portfolio currently includes about 11% noncarbon generation and that, once two contracted solar projects come online in late 2026, IMEA’s portfolio would be at least 20% renewable “if we don't find any other renewables until then.” He also said IMEA’s administrative and general costs represent roughly 2.8% of total IMEA expenses and that St. Charles paid about $40.6 million to IMEA in calendar year 2024 for power, transmission and agency services.

Peter emphasized the new power sales agreement is not a renewal clause or an extension of the existing contract but a separate agreement IMEA has offered all of its current members. He described the open enrollment period and the association’s economic-principle rationale — that members who sign in the open window should not face cost increases caused by later joiners — sometimes called cost causation.

Council questions and staff response

Multiple council members pushed for additional, independent analysis before any commitment. Questions included whether the city could join another supplier or a power marketer, how signing now would affect local control and long-term costs, and what protections or “guardrails” the contract contains if IMEA or the Prairie State facility’s portfolio changes.

Staff said the city could remain an IMEA member without a power sales agreement but that it would be impractical because IMEA’s purpose is to supply power to members. Staff also said the city is funding decommissioning liabilities for Prairie State and Trimble County through IMEA and that those decommissioning funds are being collected during the existing contract period.

Consultant work and outside studies

Councilors referenced an independent study being prepared for Naperville and set for presentation April 8; staff said that report will be available to St. Charles and could be used as a starting point. Several council members asked staff to obtain comparable independent cost models and pro forma analyses comparing IMEA membership to alternative procurement paths (for example, power marketers, partial requirements contracts or other joint action agencies) and requested staff solicit presentations or request-for-information responses from other providers so the council can see apples-to-apples comparisons.

Public comments

More than a dozen residents and community representatives spoke during public comment. Speakers raised concerns about Prairie State’s environmental record and the prospect that a long-term commitment could prolong the use of coal-fired generation. Other speakers asked for more transparency, benchmarks tied to IMEA’s sustainability commitments, and for the city to pursue additional competitive bids or cooperative purchasing with nearby communities such as Naperville.

What happened (no formal vote)

Committee members did not take a final vote on any contract. Instead, the council and staff agreed to pursue more information: staff will collect the Naperville study when it is released, seek additional independent pro formas and feasibility analysis, and consider holding public forums in April to widen the public conversation before any decision. Several council members said they would prefer additional months of review rather than a rushed decision before IMEA’s April 30 opportunity window.

Context and next steps

IMEA asked its members to consider the new contract through April 30. Staff said signing in the open period could protect early joiners from costs arising if other jurisdictions join later, but that members who do not sign by the deadline could request to join later subject to IMEA approval and potential cost adjustments. Staff also reiterated that any decision to leave IMEA later would require the city to plan for alternative supply arrangements and make administrative changes.

Staff committed to returning with more analysis and asked councilors to identify the specific options and scenarios they want modeled. The Naperville report is due April 8; councilors asked staff to circulate that report and to plan at least one public forum in April focused on the power-supply question.

Ending

The committee left the meeting without taking a vote on the IMEA proposal and with direction for staff to compile independent cost comparisons, request additional supplier briefings and widen public engagement before any formal council action.