Union Pacific is the second largest railroad in the United States after BNSF, with which it shares a duopoly on transcontinental freight rail lines in the Western, Midwestern and Southern United States.
| FactSnippet No. 796,340 | 
Union Pacific is the second largest railroad in the United States after BNSF, with which it shares a duopoly on transcontinental freight rail lines in the Western, Midwestern and Southern United States.
| FactSnippet No. 796,340 | 
In 1996, the Union Pacific merged with Southern Pacific Transportation Company, itself a giant system that was absorbed by the Denver and Rio Grande Western Railroad.
| FactSnippet No. 796,341 | 
Meanwhile, Union Pacific worked to construct a faster, and more direct substitute for the original climb to Promontory Summit.
| FactSnippet No. 796,343 | 
Union Pacific closed facilities in Kansas City, Hinkle, Oregon, and Pine Bluff, Arkansas in 2019.
| FactSnippet No. 796,344 | 
Union Pacific ordered the first diesel streamliner, the largest fleet of turbine-electric locomotives in the world, and still owns the largest operational diesel locomotive .
| FactSnippet No. 796,345 | 
In 2017, Union Pacific decided to repaint all locomotives which were not in the current corporate colors.
| FactSnippet No. 796,346 | 
Union Pacific continues to use a small number of "heritage" steam locomotives and early streamlined diesel locomotives.
| FactSnippet No. 796,347 | 
Union Pacific has been rated the worst company to work for in 2019 by 247wallst.
| FactSnippet No. 796,348 | 
However, Union Pacific crews continue to operate the trains under a purchase-of-service agreement.
| FactSnippet No. 796,349 | 
Since then, Union Pacific has satisfied its common carrier requirements by hosting Amtrak trains.
| FactSnippet No. 796,350 | 
Between May and November 1994, Union Pacific trains derailed five times, killing at least 4 people.
| FactSnippet No. 796,351 | 
In Logan, Utah, Union Pacific altered a construction agreement to require the city to pay maintenance fees in perpetuity for an upgraded crossing, a mandate which was against state code.
| FactSnippet No. 796,352 | 
The second bill, HB405, would have required Union Pacific to replace their ageing fleet of Tier 0 switching locomotives with hydrogen or electric engines by 2028, due to Utah having very poor air quality in winter months.
| FactSnippet No. 796,353 | 
Ultimately, HB181 passed, and HB405 was dropped after Union Pacific made voluntary commitments to replace several tier 0 switching locomotives with less polluting tier 2 locomotives, as well as to test some all electric ones in the Utah Roper Rail Yard.
| FactSnippet No. 796,354 | 
In 2007, Union Pacific Railroad worked with the US EPA to develop a way to reduce locomotive exhaust emissions.
| FactSnippet No. 796,355 | 
Union Pacific Railroad Museum is a former Carnegie library in Council Bluffs, Iowa, that houses artifacts, photographs, and documents that trace the development of the railroad and the American West.
| FactSnippet No. 796,356 | 
Union Pacific pays upkeep on the privately owned building, which houses part of Union Pacific's corporate collection, one of the oldest in the United States.
| FactSnippet No. 796,357 |