Laramie, Wy – Union Pacific Corporation says mild weather helped its railroad haul a record amount of coal during the first five months of this year.
The nation's largest railroad loaded five-thousand, 304 coal trains during that period -- a company record.
Last May derailments slowed traffic on U-P's rail lines.
Union Pacific and B-N-S-F- Railway Company -- the two main U-S- shippers of coal -- have been criticized in the past year for not keeping up with the coal demand of power generating companies.
The two railroads share ownership of the tracks leading out of the Powder River Basin in northeast Wyoming.
Union Pacific officials say the railroad is working to expand its capacity, particularly on its coal lines, but that work can take several years to complete.