X0201 4 2003-12-08 0 0000830260 OREGON STEEL MILLS INC OS 0001184521 DIDYK STEPHEN H 0 0 0 1 Director, Rail and Semi-finish COMMON STOCK 2003-12-08 2003-12-16 4 S 0 1500 3.40 D 4500 D Jeff S. Stewart 2003-12-18