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Union Pacific and Progress Rail Services Support Testing on New Intermediate-Haul Locomotive Technology

Omaha, Neb., April 15, 2009 – Union Pacific and Progress Rail Services are supporting testing on a low-emission locomotive at the Southwest Research Institute in San Antonio, Texas. Testing, the first of its kind for intermediate-haul locomotives, is scheduled to begin later this month.

Originally built in the 1970s, the SD40-2 locomotive has been re-powered with a 3005 horsepower Caterpillar engine. Caterpillar's low-emission, clean diesel engine – model 3516C-HD – surpasses EPA Tier 2 locomotive emissions requirements. It incorporates advanced emission control technologies that have been tested successfully in a laboratory setting and will be tested for service on intermediate-haul routes. The engine has more power than the typical 2000-horsepower Genset switcher locomotive used around terminals, but is less powerful than the traditional 4400-horsepower line-haul locomotives used for transcontinental freight service.

The equipment has not yet been fitted onto a full-scale locomotive platform or used in an operating environment. Union Pacific, partnering with Progress Rail Services, initially will field-test this locomotive in a controlled local application to closely monitor its performance and durability over the testing period.

About Union Pacific

Union Pacific Corporation owns one of America's leading transportation companies. Its principal operating company, Union Pacific Railroad, links 23 states in the western two-thirds of the country. Union Pacific serves many of the fastest-growing U.S. population centers and provides Americans with a fuel-efficient, environmentally responsible and safe mode of freight transportation. Union Pacific's diversified business mix includes Agricultural Products, Automotive, Chemicals, Energy, Industrial Products and Intermodal. The railroad emphasizes excellent customer service and offers competitive routes from all major West Coast and Gulf Coast ports to eastern gateways. Union Pacific connects with Canada's rail systems and is the only railroad serving all six major gateways to Mexico, making it North America's premier rail franchise.

About Progress Rail

Progress Rail, a Caterpillar subsidiary, is one of the largest providers of outsourced maintenance and repair services to the railroad industry in North America. It is headquartered in Albertville, Alabama, and currently has more than 100 facilities throughout the United States, Canada and Mexico. Its customers include all of the major North American, or "Class 1" railroads, as well as regional railroads, public transit authorities, private car owners, railcar builders and lessors, and foundries for steel scrap. Additional information at

About Caterpillar

For more than 80 years, Caterpillar Inc. has been making progress possible and driving positive and sustainable change on every continent. With 2007 sales and revenues of $44.958 billion, Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. The company also is a leading services provider through Caterpillar Financial Services, Caterpillar Remanufacturing Services, Caterpillar Logistics Services and Progress Rail Services. More inforamtion is available at

For further information, contact Tom Lange at (402) 544-3560 or


The statements and information contained in the news releases provided by Union Pacific speak only as of the date issued. Such information by its nature may become outdated, and investors should not assume that the statements and information contained in Union Pacific's news releases remain current after the date issued. Union Pacific makes no commitment, and disclaims any duty, to update any of this information.