March 1, 2006 — Oregon Steel Mills, Inc. has been awarded a contract to supply large-diameter pipe for the Rockies Express Pipeline LLC Project (REX), a new 1,323-mile natural gas pipeline that will originate near Cheyenne, Wyo., and extend into eastern Ohio. Construction of the pipeline is anticipated to begin in May of 2007.

Oregon Steel’s contract is for approximately 510,000 tons of 42-inch X-80 grade large diameter line pipe. REX also has an option, through March 14, 2006, to purchase an additional 350,000 tons of X-80grade large diameter line pipe from Oregon Steel.

Oregon Steel expects to begin production of pipe for the project beginning in the fourth quarter of 2006 at its pipe mills in Camrose, Alta., Canada, and Portland, Ore. With receipt of this order, Oregon Steel anticipates that its large diameter pipe mills, as currently configured, will be near their rated capacities into the fourth quarter of 2007.

Oregon Steel Mills is organized into two divisions. The Oregon Steel Division produces steel plate, coil, welded pipe and structural tubing from plants located in Portland, Ore., and Camrose, Alta., Canada. The Rocky Mountain Steel Mills Division, located in Pueblo, Colo., produces steel rail, rod, bar, and tubular products.