Oct 25, 2006. /Lesprom Network/. Koppers Holdings Inc. reported on October 25 an operational problem at its coke facility in Monessen, Pennsylvania. Production at the plant was interrupted on Friday, October 20, 2006 due to a pipeline failure. Repairs have been completed and operations are in the process of restarting; the company expects production to be back to normal by Monday, October 30. The impact on fourth quarter pre-tax earnings is expected to be approximately $600 000-$800 000. Koppers, with corporate headquarters and a research center in Pittsburgh, Pennsylvania, is a global integrated producer of carbon compounds and treated wood products. Including its joint ventures, Koppers operates facilities in the United States, United Kingdom, Denmark, Australia, China, the Pacific Rim and South Africa. The stock of Koppers Holdings Inc. is publicly traded on the New York Stock Exchange.