Fort Martin Units 1 and 2

Monongahela Power
Maidsville, West Virginia

Plant Owner
Monongahela Power a subsidiary of FirstEnergy Corp.

Plant Name
Fort Martin Units 1 and 2

Maidsville, West Virginia

Contract Order: 2006

Commercial Operation: 2009

The wet flue gas desulfurization (FGD) system from Babcock & Wilcox (B&W) features a combination of design components to provide a high level of reliability and removal efficiencies. These include B&W's signature dual tray tower design that provides excellent gas-to-liquid contact and uniform flow distribution through the absorber spray zones; its patented inlet awning; interspatial headers to reduce absorber height, pump power requirements, and internal support costs; forced oxidation system; and advanced mist eliminators.

The construction plan included an on-site scrubber module fabrication area that produced absorber modules for both the Fort Martin and Hatfield’s Ferry sites. This plan optimized modularization opportunities because off-site modularization was not feasible due to access constraints created by locks on the adjacent Monongahela River.

Boiler/Plant Information 

Project Summary

  • Engineering, procurement and construction of a wet FGD system
  • System designed to remove 98% of the entering sulfur dioxide (SO2)
  • Type: Limestone forced oxidation with gypsum byproduct
  • Project awarded: April 2006
  • Construction plan included on-site scrubber module fabrication area
  • Operation dates: November 2009 (Unit 1); December 2009 (Unit 2)

B&W Scope

  • Two wet FGD absorbers (one per boiler)
  • Two limestone milling systems (one per boiler)
  • Gypsum dewatering system including three horizontal table filters (two operating, one spare)
  • Buildings and structural steel
  • Construction of B&W supplied equipment and steel provided by Babcock & Wilcox Construction Co., Inc.


Both of the commissioned units have met performance guarantees and achieved mechanical and substantial completion milestones ahead of schedule. Units 1 and 2 started up on schedule one month apart.

New Build

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