RPU: wind contracts and Mount Simon secure two‑thirds of 2030 goals; board to consider 6% near‑term rate path

Mister McCullough, an RPU staff member, presented Rochester Public Utilities’ (RPU) power‑supply resource plan at the City Council’s Sept. 29 study session and said the utility will ask the RPU board the next day to reaffirm the city’s 100% net‑renewable by 2030 target and to consider a higher near‑term rate path to reduce exposure to market cost volatility.

“We have 48 slow short slides for you, so this should be a very quick conversation,” McCullough began, signaling a technical presentation that nevertheless emphasized two conclusions: (1) a package of wind power purchase agreements and the planned Mount Simon Station generation together already cover roughly two‑thirds of RPU’s 2030 capacity and renewable needs; and (2) the utility still needs to secure additional reliable capacity (staff estimated roughly 100 megawatts, focused on summer peak season) and must manage a range of short‑term cost risks before 2030.

Why it matters: RPU’s choices will affect retail electric rates, local reliability and the community’s greenhouse‑gas trajectory. Staff described a strategy of accelerating renewable procurement now (to capture available tax incentives), banking renewable energy credits (RECs) to meet compliance, and seeking options for remaining capacity — including battery storage, local fast‑ramping generation and possible contracts with other providers.

What staff reported

Progress secured: McCullough said recent agreements (described in the presentation as Adams Wind and Dodge Center, plus a North Hills project to follow) combined with planned local generation at Mount Simon Station put RPU in a position to meet about 70% of its annual renewable electricity needs once the wind projects come online. Staff said the earliest practical full online date for the wind projects is about 2028. McCullough reported that, across the current portfolio and planned additions, RPU has secured roughly two‑thirds of both the renewable and reliable capacity needs that underlie its 2030 planning.

Capacity gap and options: Staff said renewables contribute limited summer capacity and that RPU needs additional summer capacity for peak months. McCullough listed battery storage (shorter‑term, faster to build) and firm natural‑gas peaking generation (dispatchable capacity) as the primary options. He noted uncertainty about battery tax‑credit eligibility and evolving accreditation rules that could make battery projects more expensive; he further said batteries that qualify for capacity obligations will likely need to be longer duration in the 2030 time frame (e.g., 6‑ to 8‑hour systems versus today’s four‑hour standard), which raises costs.

Cost and market risks: McCullough ran through recent cost pressures — tariffs and import restrictions, inflation in materials and labor, supply chain impacts, and the evolving interpretation and phase‑out timelines for federal tax credits (including provisions in the Inflation Reduction Act). He warned that those forces have raised near‑term cost projections and that RPU is modeling scenarios that show a higher risk of elevated market costs around 2028–29.

Survey and public feedback: RPU staff said they emailed the community (about 47,000 individual links) and received roughly 1,900 responses. McCullough reported that about 70% of respondents said a 100% renewable electricity goal by 2030 is important, while a majority of respondents (roughly 60%) favored a “slower, measured” pace when asked about tradeoffs between speed and near‑term cost. Staff said the survey responses informed the recommendation to present a rate path that collects more through base rates (a 6% scenario in 2026–27) to reduce the risk of large power‑cost adjustments flowing through later if market costs spike.

Financial framing and board action: McCullough described multiple 20‑year financial scenarios that varied by whether RPU borrows now to build capacity or contracts with outside providers. He said the RPU board will consider a resolution to reaffirm the 100% net‑renewable by 2030 target, to authorize a REC‑banking strategy and to direct staff to continue advancing the plan while balancing reliability and rate impacts. He said staff will ask the board to consider a 6% rate path for 2026–27 to reduce exposure to expected market cost adjustments in 2028–29; the board’s decision was scheduled for the following day.

Other operational points cited by staff

• Mount Simon Station: staff said design work, interconnection applications and permitting are underway; RPU is targeting commercial operation in 2029. McCullough showed the planned unit as a key source of local capacity.

• GT1: RPU is pursuing a rebuild of the local gas turbine (GT1) that was damaged by fire; staff said restoring GT1 by next year could reduce 2027 borrowing needs by about $60 million and lower annual debt service by roughly $5 million.

• REC banking: accelerating renewables now and banking RECs would allow RPU to meet the 2030 target and sustain the goal for about a decade before additional supply is needed (staff estimated the REC “bank” would require new supply again around 2034 unless further contracts are executed).

Council response and next steps

Council members asked for more detail on demand response, customer conservation programs, coordination with the city’s sustainability reporting, and the survey methodology; McCullough said demand response and conservation are part of the plan and that a fuller rundown of customer programs could be scheduled. Council members expressed a range of views on the recommended 6% near‑term rate path; several said they wanted more time to review before a vote at the RPU board meeting.

RPU staff’s recommendation to the board was to reaffirm the 100% net‑renewable by 2030 goal, pursue the wind and other renewable agreements under negotiation, support REC banking to smooth compliance through 2030, and consider adopting a 6% base‑rate path for 2026–27 to mitigate power‑cost adjustment exposure. The RPU board was scheduled to consider the resolution and the rate path the day after the study session; no board action occurred at the council study session.

Speakers quoted or referenced in this report include Mister McCullough (RPU staff member), Council member Miller, Council member Keane, Council member Wall, Council member Doreen, Mayor Norton and RPU staff and board representatives.