Weston Unit 4

Wisconsin Public Service
Wausau, Wisconsin

Plant Owner
Wisconsin Public Service

Plant Name
Weston Unit 4


Near Wausau, Wisconsin

B&W Scope

Boiler Specifications  

  • Boiler type: Pulverized coalfired Spiral Wound Universal Pressure (SWUP™)-type supercritical boiler
  • Design fuel: Low sulfur Powder River Basin coal
  • Capacity: 530 MW net
  • Steam flow: 3,641,000 lb/h (458 kg/s)
  • Superheater outlet pressure: 3775 psig (26 MPa)
  • SH/RH outlet temperature: 1085/1085 F (585/585 C)

The Weston 4 supercritical boiler utilizes spiral furnace tube technology that provides flexible and reliable operation.

Weston site aerial view during construction.

Environmental Equipment 

Other Equipment Supplied by B&W

Contract Order: 2004

Commercial Operation 2008

Sectional Sideview of Weston 4 Boiler with Air Quality Control Equipment

Hover and click on the numbered image shown below to learn more!

Sectional sideview of Weston 4 boiler with air quality control equipment




Fabric Filter


From Dry FGD




New Build

We consistently demonstrate the ability to successfully execute innovative solutions for our customers, from new equipment to large, complex full-scope engineering and construction projects.

Upgrades / Retrofits

Modifying, improving and maintaining existing equipment are vital considerations for the long-term viability and profitability of all operations.

Parts / Services

An extensive network of worldwide regional service centers, field service engineers and technical support personnel are available to provide the customized service and aftermarket solutions for your requirements.