Union Pacific Railroad

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ADVANCE FOR USE SATURDAY, JULY 1, AND THEREAFTER – FILE – In this Oct. 3, 2016, file photo, Steve Case, co-founder and former chairman and CEO of AOL Inc., poses in front of a Union Pacific locomotive as he kicks off his "Rise of the Rest" startup bus tour in Omaha, Neb. As part of his "Rise of the Rest" bus tour to invest in entrepreneurs and startup firms, Case plans to visit the south-central Pennsylvania cities of Harrisburg, Lancaster and York on Oct. 10, 2017, joined by venture capitalist J.D. Vance, author of the best-selling memoir "Hillbilly Elegy." (AP Photo/Nati Harnik, File)

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FILE - In this June 3, 2016, file photo, a Union Pacific oil train burns near the town of Mosier, Ore., after derailing. Oregon lawmakers sent legislation requiring railroads to develop safety plans for oil spills back to a legislative committee Friday, June 30, 2017, because of concerns about concessions to the rail industry. (Alan Berner/The Seattle Times via AP, File)/The Seattle Times via AP)

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FILE--In this June 3, 2016, file image, from video provided by KGW-TV, smoke billows from a Union Pacific train that derailed near Mosier, Ore., in the scenic Columbia River Gorge. Oregon lawmakers sent legislation requiring railroads to develop safety plans for oil spills back to a legislative committee Friday, June 30, 2017, because of concerns about concessions to the rail industry. (KGW-TV via AP, File)

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FILE - In this June 3, 2016, file image made from a video provided by KGW-TV, smoke billows from a Union Pacific train that derailed near Mosier, Ore., in the scenic Columbia River Gorge. Inspectors have found almost 24,000 safety defects over a two-year period along United States railroad routes used to ship volatile crude oil. Data obtained by The Associated Press shows many of the defects were similar to problems blamed in past derailments that caused massive fires or oil spills in Oregon, Virginia and Montana. (KGW-TV via AP, File)

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FILE - In this June 24, 2010 file photo, the Los Angeles skyline is seen above the Union Pacific Railroad East Los Angeles Intermodal facility in the City of in Commerce, Calif. A long-term plan for cleaning up the air in a huge swath of smoggy Southern California is due for consideration by regulators. Directors of the South Coast Air Quality Management District are expected to vote on the plan Friday, March 3, 2017. (AP Photo/Damian Dovarganes, File)

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Emergency crews work to place sandbags Wednesday, Feb. 8, 2017, after the 21 Mile Dam near Montello, Nev., broke and caused flooding to the Union Pacific railroad line near Lucin and flooded the town of Montello. (Stuart Johnson/ The Deseret News via AP)/The Deseret News via AP)

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On Wednesday, Feb. 8, 2017, 21 Mile Dam near Montello, Nev., broke and caused flooding to the Union Pacific railroad line near Lucin and flooded the town of Montello, Nev. The floods forced delays or rerouting for more than a dozen freight and passenger trains on a main rail line that runs through the area, said Union Pacific spokesman Justin E. Jacobs.(Stuart Johnson/The Deseret News via AP)/The Deseret News via AP)

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On Wednesday, Feb. 8, 2017, 21 Mile Dam near Montello, Nev., broke and caused flooding to the Union Pacific railroad line near Lucin and flooded the town of Montello, Nev. The floods forced delays or rerouting for more than a dozen freight and passenger trains on a main rail line that runs through the area, said Union Pacific spokesman Justin E. Jacobs.(Stuart Johnson/The Deseret News via AP)/The Deseret News via AP)

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Train tracks are flooded Wednesday, Feb. 8, 2017, after the 21 Mile Dam near Montello, Nevada, broke and caused flooding to the Union Pacific railroad line near Lucin and flooded the town of Montello. The dam break forced delays or rerouting for more than a dozen freight and passenger trains on a main rail line that runs through the area, said Union Pacific spokesman Justin E. Jacobs. (Stuart Johnson/ The Deseret News via AP)

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FILE In this June 3, 2016, file image, from video provided by KGW-TV, smoke billows from a Union Pacific train that derailed near Mosier, Ore., in the scenic Columbia River Gorge. The nation's largest railroad has agreed to more thorough inspections and maintenance improvements after the fiery oil train derailment in Oregon and the discovery of more than 800 potential safety violations across its sprawling network. (KGW-TV via AP, File)

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This Dec. 2, 2016 photo, shows a breach in the Union Pacific causeway that separates the the north and the south ends of the Great Salt Lake in Utah. Now that a causeway that divided the Great Salt Lake for more than 50 years has been breached, state officials will begin monitoring to see if the free flow of water between the two sides helps with water levels and salt content, the Standard-Examiner of Ogden reported. (Steve Griffin/The Salt Lake Tribune via AP)

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This Dec. 2, 2016 photo, shows a breach in the Union Pacific causeway that separates the the north and the south ends of the Great Salt Lake in Utah. Now that a causeway that divided the Great Salt Lake for more than 50 years has been breached, state officials will begin monitoring to see if the free flow of water between the two sides helps with water levels and salt content, the Standard-Examiner of Ogden reports. (Steve Griffin/The Salt Lake Tribune via AP)

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This Dec. 2, 2016 photo, shows a breach in the Union Pacific causeway that separates the the north and the south ends of the Great Salt Lake in Utah. Now that a causeway that divided the Great Salt Lake for more than 50 years has been breached, state officials will begin monitoring to see if the free flow of water between the two sides helps with water levels and salt content, the Standard-Examiner of Ogden reported. (Steve Griffin/The Salt Lake Tribune via AP)

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This Dec. 2, 2016 photo, shows a breach in the Union Pacific causeway that separates the the north and the south ends of the Great Salt Lake in Utah. Now that a causeway that divided the Great Salt Lake for more than 50 years has been breached, state officials will begin monitoring to see if the free flow of water between the two sides helps with water levels and salt content, the Standard-Examiner of Ogden reports. (Steve Griffin/The Salt Lake Tribune via AP)

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In this Friday, June 6, 2014, photo, Union Pacific locomotives are seen in Council Bluffs, Iowa. Union Pacific reports quarterly earnings, Thursday, Jan. 21, 2016. (AP Photo/Nati Harnik)

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File - In this Jan. 26, 2014 file photo, spectators view the historic locomotive, Union Pacific Big Boy No. 4014 at Metrolink Station, in Covina, Calif. The locomotive was to head for Colton over the next several weeks before No. 4014 is towed to Union Pacific's Heritage Fleet Operations headquarters in Cheyenne, Wyo. (AP Photo/Ringo H.W. Chiu, file)