As part of an environmental improvement project contract with American Electric Power Service Corporation, Pullman Power LLC designed, supplied and constructed a 1,000 foot, single-flue chimney for the Mountaineer Plant located in New Haven, West Virginia. This was the first project of the 11 chimney program. The chimney serves one unit, which has a generating capacity of 1,300 megawatts. The project also included two new scrubbers to control sulfur dioxide emissions. Work began in March 2005 and was completed in August 2007

Not only is this chimney impressive because of its height, but it contains the largest fiberglass liner ever built. Further, at the time of construction, it had the largest diameter at 42.5-feet, which posed several construction challenges. Because of the large diameter and site access constraints, Pullman Power devised a new means to build the fiberglass liner from the inside out, eliminating the need to construct openings large enough to accept the liner cans. The unique solution involved winding the cans for the 835-foot tall liner inside the bottom of the chimney. In addition to multiple safety concerns, the working conditions were tight and influenced by weather. A temporary ceiling was erected at 82 feet, which separated the fabrication facility from the rest of the chimney. The size of the power unit necessitated two absorbers and breechings, which necessitated a 67 foot tall baffle wall for the re-direction of the flue gas into the single liner. 

More than 914 tons of reinforced steel and 10,600 cubic yards of concrete were used to construct the chimney, and more than of 200 tons of structural steel was used for the liner support and platforms. The top supported fiberglass liner weighs in at 1,200,000 pounds.  In addition to the two breeching openings, the concrete wind shield has two additional ‘knock-out' breeching openings for the customer to use for future upgrades.