Auxiliary Steam Plant – Dayton Power & Light

Project Specifications

Start-up Year

Construction Cost
$8 million

Construction Type
Existing Building

Dayton Power & Light’s J.M. Stuart Station is a four unit, coal fired power plant with a generating capacity of 2,340 megawatts. The facility is located on State Route 52, 4 miles east of Aberdeen, Ohio. This project provided a means to efficiently start the power plant when the facility tripped off line. Steam from this plant was used to preheat the 3,200 psig lines before start-up of the main power boilers.


Fosdick & Hilmer provided the mechanical, electrical, and control system design and integration along with O&M manuals, operator training, start-up assistance, and commissioning assistance for all systems designed.

Project was completed on schedule and within the allowable budget.

Key Features

  • Prepared specifications for Owner purchase of large mechanical and electrical equipment.
  • Assisted owner in obtaining Ohio EPA permits for № 2 fuel oil fired units.
  • Four 60,000 lb./hr., ultra-low sulfur № 2 fuel oil fired packaged steam boilers.
  • Combined boiler exhaust breaching to one 8 foot diameter, 130’ self-supporting stack with ladders, platforming and instrumentation test ports.
  • New 260,000 lb/hr tray-type deaerator and feedwater system.
  • Conversion of № 6 fuel oil storage tank to № 2 fuel oil; new fuel oil pumping and piping system.
  • Installation of new switchgear and MCC’s
  • Direct digital control system including integration with combustion control system and burner management systems.
  • Partial demolition and renovation in a building adjacent to the main power plant.
  • Removal and relocation of site structures.
  • New pipe trestle and modifications to existing pipe trestles.
  • Asbestos abatement at piping tie-in points.