Pittsburgh, Pennsylvania, USA, 25 October 2006 -- /PRNewswire/ -- Koppers Holdings Inc. (NYSE:KOP) today reported an operational problem at its coke facility in Monessen, Pennsylvania.

Production at the plant was interrupted on 20 October 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 30 October. The effect on fourth quarter pre-tax earnings is expected to be approximately USD 600,000-800,000.

About Koppers

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 under the symbol "KOP." For more information, visit www.koppers.com.

Source: Koppers Holdings Inc.