The completed transaction adds the 677-MW Lee County Generating Station in Illinois and the 586-MW Tait Electric Generating Station in Ohio to Hull Street Energy’s Milepost Power platform.
Published by Allstream Insiders
Allstream Insiders Summary
Hull Street Energy has completed its acquisition of two peaking power plants with a combined generating capacity of 1,263 megawatts in the PJM Interconnection market. The company acquired the facilities from Rockland Capital and will add them to Milepost Power, Hull Street Energy’s thermal power generation platform.
The acquired assets comprise the 677-MW Lee County Generating Station in Illinois and the 586-MW Tait Electric Generating Station in Ohio. Hull Street Energy refers to the two-plant package as the GridFlex Portfolio.
Hull Street Energy announced completion of the transaction on August 26, 2026. The announcement represents a transfer of operating generation assets rather than a new power-plant construction decision.
Which power plants did Hull Street Energy acquire?
The GridFlex Portfolio consists of two dispatchable generating facilities operating within PJM. Hull Street Energy identifies Lee County as a natural-gas turbine facility and Tait as a dual-fuel facility.
| Generating asset | Location | Company-reported capacity | Facility description |
|---|---|---|---|
| Lee County Generating Station | Illinois | 677 MW | Natural-gas turbine facility |
| Tait Electric Generating Station | Ohio | 586 MW | Dual-fuel facility |
| GridFlex Portfolio | PJM market | 1,263 MW | Combined acquired capacity |
The 1,263-MW total is the sum of the individual capacities Hull Street Energy reported for Lee County and Tait. It describes the generating capacity included in the acquisition, not newly constructed capacity.
How will the GridFlex plants fit within Milepost Power?
Lee County and Tait will become part of Milepost Power, Hull Street Energy’s thermal generation platform. Following the acquisition, Hull Street Energy says the Milepost Power fleet includes nearly 5,000 MW of gas-fired and dual-fuel generation capacity.
The nearly 5,000-MW figure applies to the broader Milepost Power fleet after the transaction. It should not be interpreted as the size of the GridFlex Portfolio, which totals 1,263 MW.
Hull Street Energy says both acquired facilities provide capacity and operational flexibility within PJM. In its original transaction announcement, the company described Lee County and Tait as reliable, fast-start resources that support grid stability.
Why are the Illinois and Ohio plants relevant to PJM?
The plants operate in a regional power market where Hull Street Energy says capacity and operational flexibility support grid reliability. PJM coordinates wholesale electricity markets and grid operations across all or parts of 13 states and the District of Columbia, including Illinois and Ohio.
Hull Street Energy connected the acquisition to tightening reserve margins, an increasingly intermittent generation mix and rising electricity demand within PJM. Those observations reflect the company’s stated rationale for retaining and improving existing assets such as Lee County and Tait.
The acquisition announcement does not identify a new generating unit, capacity expansion or construction schedule at either plant. It also does not announce an engineering, procurement or construction award.
Allstream perspective: ownership change puts two operating plants under one thermal platform
The immediate industrial event is an ownership and portfolio-integration change affecting two operating power plants. For contractors and equipment suppliers, the next actionable signals would be any plant-specific maintenance, reliability, controls, emissions, fuel-system or capacity-improvement programs announced by Milepost Power after integration.
If Hull Street Energy later authorizes asset-level work, the disclosed plant configurations could be relevant to services involving:
- Gas-turbine inspections, maintenance and component replacement
- Electrical balance-of-plant and substation services
- Instrumentation, controls and plant-automation systems
- Fuel-system inspection and maintenance
- Emissions-monitoring and environmental-compliance equipment
- Reliability, outage and life-extension engineering
These work categories are conditional Allstream analysis based on the types of operating assets identified in the announcement. They are not announced capital projects, bid packages, solicitations or contractor awards.
