Union Pacific 4014 (English Wikipedia)

Franz, Justin (June 30, 2022). "Union Pacific 'Big Boy' to Visit Denver in July". Railfan & Railroad. White River Productions. Archived from the original on July 1, 2022. Retrieved July 1, 2022.
"Union Pacific Fires Up 'Big Boy' to Move Rare 2-10-2". Railfan & Railroad. White River Productions. September 15, 2022. Archived from the original on May 29, 2023. Retrieved November 27, 2023.
"Union Pacific 'Big Boy' 4014 Heads West in July". Railfan & Railroad. White River Productions. April 10, 2024. Archived from the original on April 10, 2024. Retrieved April 24, 2024.
"UP 4014 First Main Line Steam Locomotive Outfitted With PTC". Railfan & Railroad. White River Productions. August 20, 2021. Archived from the original on August 20, 2021. Retrieved October 14, 2022.
"'Big Boy' 4014 Runs on Main Line Solo With New PTC System". Railfan & Railroad. White River Productions. May 23, 2024. Archived from the original on May 25, 2024. Retrieved May 26, 2024.

railgiants.org

"Union Pacific No. 4014" (PDF). RailGiants Train Museum. Railway & Locomotive Historical Society, Southern California Chapter. August 2014. Archived from the original (PDF) on July 30, 2016. Retrieved April 30, 2019.
"Union Pacific SD40-2C No. 3105". RailGiants Train Museum. Archived from the original on April 27, 2019. Retrieved April 28, 2019.

railwayage.com

Vantuono, William C. (July 28, 2013). "UP: A return to steam for Big Boy 4014". Railway Age. Simmons-Boardman Publishing. Archived from the original on April 28, 2019. Retrieved April 28, 2019.

rrhma.com

"Union Pacific, Railroading Heritage of Midwest America reach agreement to preserve historic locomotives, passenger cars" (Press release). Railroading Heritage of Midwest America. Archived from the original on April 28, 2022. Retrieved May 2, 2022.

sgvtribune.com

Day, Brian (January 26, 2014). "Gigantic, 73-year-old steam locomotive pays visit to Covina". San Gabriel Valley Tribune. Archived from the original on December 19, 2022. Retrieved July 21, 2023.

sltrib.com

Gruver, Mead (May 9, 2019). "Massive restored locomotive steaming to Ogden for Thursday Golden Spike gathering". The Salt Lake Tribune. Archived from the original on April 21, 2024. Retrieved January 8, 2025.

thecheyennepost.com

Bodiford, Vince (April 29, 2020). "Union Pacific Big Boy #4014 steam tour cancelled". The Cheyenne Post. Archived from the original on May 16, 2020. Retrieved May 23, 2021.

trains.com

trn.trains.com

Wrinn, Jim (February 15, 2018). "Where to find Big Boy locomotives". Trains. Kalmbach Media. Archived from the original on September 28, 2018. Retrieved June 12, 2019.
"Big Boy Work Begins". Trains. Kalmbach Media. August 12, 2016. Archived from the original on July 10, 2018. Retrieved April 28, 2019.
"Progress report on Union Pacific Big Boy 4014". Trains. Kalmbach Media. March 3, 2018. Archived from the original on July 27, 2018. Retrieved May 4, 2019.
"Union Pacific confirms Big Boy 4-8-8-4 No. 4014 for Ogden in 2019 and more". Trains. Kalmbach Media. May 10, 2018. Archived from the original on October 18, 2018. Retrieved May 4, 2019.
Glischinski, Steve (March 29, 2017). "Minnesota steam engine to use Big Boy fire grates". Trains. Kalmbach Media. Archived from the original on March 31, 2017. Retrieved August 5, 2019.
"'Big Boy' passes early pressure test". Trains. Kalmbach Media. February 6, 2019. Archived from the original on May 4, 2019. Retrieved June 27, 2019.
"Big Boy No. 4014 fired up for the first time; May 12 excursion announced". Trains. Kalmbach Media. April 10, 2019. Archived from the original on April 10, 2019. Retrieved April 16, 2019.
Wrinn, Jim (May 2, 2019). "Under its own power, Big Boy moves outside of shop". Trains. Kalmbach Media. Archived from the original on May 2, 2019. Retrieved May 2, 2019.
Wrinn, Jim (May 3, 2019). "Big Boy debuts with test run". Trains. Kalmbach Media. Archived from the original on May 3, 2019. Retrieved May 3, 2019.
Sweeney, Steve (May 4, 2019). "UP steam crew has Big Boy ready to roll". Trains. Kalmbach Media. Archived from the original on May 6, 2019. Retrieved July 17, 2019.
Wrinn, Jim (May 4, 2019). "Big Boy christened, begins trip to Golden Spike celebration". Trains. Kalmbach Media. Archived from the original on May 5, 2019. Retrieved May 5, 2019.
"Big Boy 4014 gets drivers; UP asks for PTC waivers for three steam locomotives". Trains. Kalmbach Media. December 13, 2018. Archived from the original on June 8, 2019. Retrieved June 9, 2019.
Wrinn, Jim (February 28, 2019). "FRA: UP doesn't need waiver to run steam 11,000 miles in 2019". Trains. Kalmbach Media. Archived from the original on June 9, 2019. Retrieved June 9, 2019.
"Union Pacific to renumber SD70M No. 4014 before Big Boy runs". Trains. Kalmbach Media. June 27, 2018. Archived from the original on October 18, 2018. Retrieved April 28, 2019.
"Diesel No. 4014 gets new number ahead of Big Boy debut". Trains. Kalmbach Media. May 16, 2019. Archived from the original on May 28, 2019. Retrieved May 28, 2019.

trains.com

Glischinski, Steve (August 21, 2013). "Big Boy story began in 1940". Trains. Kalmbach Media. Archived from the original on October 25, 2021. Retrieved October 9, 2022.
"Union Pacific studying Big Boy restoration project". Trains. Kalmbach Media. December 7, 2012. Archived from the original on July 10, 2023. Retrieved July 10, 2023.
Glischinski, Steve (March 11, 2021). "Study will consider conversion of Milwaukee Road 261 to burn oil". Trains. Kalmbach Media. Archived from the original on September 20, 2021. Retrieved July 7, 2023.
Kratville-Wrinn, Cate (May 13, 2022). "Original Big Boy tender to be restored by Railroading Heritage of Midwest America". Trains. Kalmbach Media. Archived from the original on May 13, 2022. Retrieved May 16, 2022.
Glischinski, Steve (April 28, 2022). "Railroading Heritage of Midwest America, Union Pacific agree to donation of Challenger, other locomotives, cars". Trains. Kalmbach Media. Archived from the original on April 28, 2022. Retrieved May 2, 2022.
"Union Pacific announces Big Boy trip to Omaha". Trains. Kalmbach Media. May 19, 2023. Archived from the original on May 19, 2023. Retrieved May 19, 2023.
"UP placing two tickets on sale today for Big Boy cab rides". Trains. Kalmbach Media. June 23, 2023. Archived from the original on June 27, 2023. Retrieved July 5, 2023.
"UP Museum holds auction for Big Boy cab ride". Trains. Kalmbach Media. June 5, 2023. Archived from the original on June 5, 2023. Retrieved June 27, 2023.
"Diesel helpers often lend a hand on mainline steam excursions". Trains. Kalmbach Media. March 8, 2024. Archived from the original on March 29, 2024. Retrieved May 26, 2024.

cs.trains.com

Wrinn, Jim (February 8, 2019). "Big Boy 4014, a hydrostatic test, and why UP can beat the usual six month rule". Trains. Kalmbach Media. Archived from the original on May 30, 2019. Retrieved May 30, 2019.
Wrinn, Jim (March 31, 2020). "Union Pacific No. 3985's next stop". Trains. Kalmbach Media. Archived from the original on January 17, 2021. Retrieved June 23, 2021.
Keefe, Kevin (January 17, 2020). "The Challenger at high tide". Classic Trains. Kalmbach Media. Archived from the original on May 11, 2021. Retrieved June 23, 2021.

twincities.com

Obert, Elizabeth (July 14, 2019). "Historic locomotive Big Boy No. 4014 rolls into St. Paul". St. Paul Pioneer Press. Archived from the original on May 11, 2021. Retrieved November 16, 2022.

up.com

"Big Wheels Not Yet Turnin'". Community Ties. Union Pacific. August 15, 2013. Archived from the original on December 10, 2017. Retrieved May 5, 2019.
"UP No. 3105 Heads Home to RailGiants Museum". Community Ties. Union Pacific. February 21, 2014. Archived from the original on August 2, 2016. Retrieved May 1, 2019.
"Big Boy No. 4014 Prepares to Leave Pomona". Community Ties. Union Pacific. November 14, 2013. Archived from the original on May 30, 2017. Retrieved May 5, 2019.
"Fans Welcome Big Boy No. 4014's Return to the National Rail Network". Community Ties. Union Pacific. January 27, 2014. Archived from the original on May 1, 2019. Retrieved May 14, 2019.
"West Colton Yard" (PDF). Union Pacific (Press release). Archived from the original (PDF) on June 6, 2019. Retrieved June 6, 2019.
""Living Legend" Northern No. 844". Union Pacific. Archived from the original on April 21, 2019. Retrieved May 3, 2019.
"Steam Update: Big Boy No. 4014 Restoration Begins". Inside Track. Union Pacific. August 11, 2016. Archived from the original on August 6, 2018. Retrieved April 27, 2019.
"Steam Update: With Disassembly Complete, Big Boy Fabrication Underway". Inside Track. Union Pacific. February 1, 2017. Archived from the original on August 22, 2017. Retrieved August 5, 2019.
"Putting the 'Big Boy' Back Together". Inside Track. Union Pacific. March 22, 2018. Archived from the original on September 17, 2018. Retrieved April 27, 2019.
"Steam Update: Big Boy's Restoration Nearly Complete". Inside Track. Union Pacific. January 29, 2019. Archived from the original on April 27, 2019. Retrieved April 27, 2019.
"World's Largest Steam Locomotive Returns to the Rails as Union Pacific Commemorates Transcontinental Railroad's 150th Anniversary" (Press release). Union Pacific. March 14, 2019. Archived from the original on May 2, 2019. Retrieved May 2, 2019.
"Union Pacific Recreates Historic Steam Meet, Commemorating 150th Anniversary of the Transcontinental Railroad's Completion" (Press release). Union Pacific. May 9, 2019. Archived from the original on June 11, 2019. Retrieved June 11, 2019.
"Union Pacific's Big Boy No. 4014 Locomotive Prepares for 'Great Race Across the Midwest'" (Press release). Union Pacific. June 13, 2019. Archived from the original on July 8, 2019. Retrieved July 8, 2019.
"Union Pacific's Big Boy No. 4014 Locomotive Concludes 150th Anniversary Celebration with 'Great Race Across the Southwest'" (Press release). Union Pacific. September 5, 2019. Archived from the original on September 6, 2019. Retrieved September 28, 2019.
"Full Steam Ahead: World's Largest Steam Locomotive Returns with 'The Big Boy 2021 Tour'" (Press release). Union Pacific. June 14, 2021. Archived from the original on June 14, 2021. Retrieved June 17, 2021.
"Union Pacific Announces Big Boy No. 4014 July Trip between Denver and Cheyenne" (Press release). Union Pacific. July 21, 2022. Archived from the original on July 21, 2022. Retrieved July 29, 2022.
"World's Largest Steam Locomotive 'Big Boy No. 4014' Returns to the Tracks to Celebrate 160 years of Union Pacific" (Press release). Union Pacific. April 11, 2022. Archived from the original on April 11, 2022. Retrieved April 11, 2022.
"Union Pacific Postpones Big Boy No. 4014 West Coast Steam Tour" (Press release). Union Pacific. April 22, 2022. Archived from the original on April 23, 2022. Retrieved April 23, 2022.
"Union Pacific's Historic 'Big Boy No. 4014' Set to Score a Home Run During College World Series" (Press release). Union Pacific. May 19, 2023. Archived from the original on May 22, 2023. Retrieved June 21, 2023.
"Big Boy Flexes Its Muscles with Positive Train Control". Inside Track. Union Pacific. August 19, 2021. Archived from the original on August 20, 2021. Retrieved August 20, 2021.

uphs.org

"Hancock Long-Bell 3-Chime Whistle Recordings — Union Pacific Historical Society". uphs.org. Archived from the original on June 30, 2024. Retrieved December 13, 2024.

uprr.com

"Big Boy No. 4014" (PDF) (Press release). Union Pacific. Archived from the original (PDF) on August 30, 2016. Retrieved May 4, 2019.
"Union Pacific Railroad Acquires Big Boy Locomotive No. 4014" (Press release). Union Pacific. July 23, 2013. Archived from the original on June 24, 2018. Retrieved April 30, 2019.

usatoday.com

Gruver, Mead (May 8, 2019). "Refurbished 'Big Boy' locomotive weighs more than a Boeing 747". USA Today. Associated Press. Archived from the original on June 8, 2019. Retrieved June 12, 2019.

web.archive.org

"Union Pacific No. 4014" (PDF). RailGiants Train Museum. Railway & Locomotive Historical Society, Southern California Chapter. August 2014. Archived from the original (PDF) on July 30, 2016. Retrieved April 30, 2019.
"Big Boy No. 4014" (PDF) (Press release). Union Pacific. Archived from the original (PDF) on August 30, 2016. Retrieved May 4, 2019.
Glischinski, Steve (August 21, 2013). "Big Boy story began in 1940". Trains. Kalmbach Media. Archived from the original on October 25, 2021. Retrieved October 9, 2022.
"Hancock Long-Bell 3-Chime Whistle Recordings — Union Pacific Historical Society". uphs.org. Archived from the original on June 30, 2024. Retrieved December 13, 2024.
Vantuono, William C. (July 28, 2013). "UP: A return to steam for Big Boy 4014". Railway Age. Simmons-Boardman Publishing. Archived from the original on April 28, 2019. Retrieved April 28, 2019.
Gruver, Mead (May 8, 2019). "Refurbished 'Big Boy' locomotive weighs more than a Boeing 747". USA Today. Associated Press. Archived from the original on June 8, 2019. Retrieved June 12, 2019.
"Big Wheels Not Yet Turnin'". Community Ties. Union Pacific. August 15, 2013. Archived from the original on December 10, 2017. Retrieved May 5, 2019.
Wrinn, Jim (February 15, 2018). "Where to find Big Boy locomotives". Trains. Kalmbach Media. Archived from the original on September 28, 2018. Retrieved June 12, 2019.
"Union Pacific studying Big Boy restoration project". Trains. Kalmbach Media. December 7, 2012. Archived from the original on July 10, 2023. Retrieved July 10, 2023.
"Union Pacific Railroad Acquires Big Boy Locomotive No. 4014" (Press release). Union Pacific. July 23, 2013. Archived from the original on June 24, 2018. Retrieved April 30, 2019.
"Union Pacific SD40-2C No. 3105". RailGiants Train Museum. Archived from the original on April 27, 2019. Retrieved April 28, 2019.
"UP No. 3105 Heads Home to RailGiants Museum". Community Ties. Union Pacific. February 21, 2014. Archived from the original on August 2, 2016. Retrieved May 1, 2019.
"Big Boy No. 4014 Prepares to Leave Pomona". Community Ties. Union Pacific. November 14, 2013. Archived from the original on May 30, 2017. Retrieved May 5, 2019.
Allen, David (November 14, 2013). "Big Boy lumbers to life at Pomona fairgrounds". Inland Valley Daily Bulletin. Archived from the original on June 7, 2019. Retrieved June 7, 2019.
Day, Brian (January 26, 2014). "Gigantic, 73-year-old steam locomotive pays visit to Covina". San Gabriel Valley Tribune. Archived from the original on December 19, 2022. Retrieved July 21, 2023.
"Fans Welcome Big Boy No. 4014's Return to the National Rail Network". Community Ties. Union Pacific. January 27, 2014. Archived from the original on May 1, 2019. Retrieved May 14, 2019.
"West Colton Yard" (PDF). Union Pacific (Press release). Archived from the original (PDF) on June 6, 2019. Retrieved June 6, 2019.
Forgione, Mary (April 28, 2014). "Big Boy's wheels to roll Monday on epic California-Wyoming journey". Los Angeles Times. Archived from the original on September 9, 2016. Retrieved April 30, 2019.
Rader, Anna (May 8, 2014). "Union Pacific Big Boy 4014 Arrives In Cheyenne". Wyoming Public Radio. Archived from the original on October 1, 2015. Retrieved April 30, 2019.
""Living Legend" Northern No. 844". Union Pacific. Archived from the original on April 21, 2019. Retrieved May 3, 2019.
Fike, Ellen (August 20, 2017). "Big Boy 4014 restoration still set for completion in 2019". Wyoming Tribune Eagle. Archived from the original on January 14, 2019. Retrieved June 7, 2019.
"Work on Big Boy locomotive goes slowly". Omaha World-Herald. Associated Press. November 24, 2014. Archived from the original on July 1, 2019. Retrieved July 1, 2019.
"Steam Update: Big Boy No. 4014 Restoration Begins". Inside Track. Union Pacific. August 11, 2016. Archived from the original on August 6, 2018. Retrieved April 27, 2019.
"Big Boy Work Begins". Trains. Kalmbach Media. August 12, 2016. Archived from the original on July 10, 2018. Retrieved April 28, 2019.
"Steam Update: With Disassembly Complete, Big Boy Fabrication Underway". Inside Track. Union Pacific. February 1, 2017. Archived from the original on August 22, 2017. Retrieved August 5, 2019.
"Progress report on Union Pacific Big Boy 4014". Trains. Kalmbach Media. March 3, 2018. Archived from the original on July 27, 2018. Retrieved May 4, 2019.
"Union Pacific confirms Big Boy 4-8-8-4 No. 4014 for Ogden in 2019 and more". Trains. Kalmbach Media. May 10, 2018. Archived from the original on October 18, 2018. Retrieved May 4, 2019.
"Putting the 'Big Boy' Back Together". Inside Track. Union Pacific. March 22, 2018. Archived from the original on September 17, 2018. Retrieved April 27, 2019.
Frank, Al. "Big Boy". Forney Museum of Transportation. Archived from the original on December 10, 2018. Retrieved July 27, 2019.
Glischinski, Steve (March 29, 2017). "Minnesota steam engine to use Big Boy fire grates". Trains. Kalmbach Media. Archived from the original on March 31, 2017. Retrieved August 5, 2019.
Glischinski, Steve (March 11, 2021). "Study will consider conversion of Milwaukee Road 261 to burn oil". Trains. Kalmbach Media. Archived from the original on September 20, 2021. Retrieved July 7, 2023.
"Steam Update: Big Boy's Restoration Nearly Complete". Inside Track. Union Pacific. January 29, 2019. Archived from the original on April 27, 2019. Retrieved April 27, 2019.
"'Big Boy' passes early pressure test". Trains. Kalmbach Media. February 6, 2019. Archived from the original on May 4, 2019. Retrieved June 27, 2019.
Wrinn, Jim (February 8, 2019). "Big Boy 4014, a hydrostatic test, and why UP can beat the usual six month rule". Trains. Kalmbach Media. Archived from the original on May 30, 2019. Retrieved May 30, 2019.
"Big Boy No. 4014 fired up for the first time; May 12 excursion announced". Trains. Kalmbach Media. April 10, 2019. Archived from the original on April 10, 2019. Retrieved April 16, 2019.
Wrinn, Jim (May 2, 2019). "Under its own power, Big Boy moves outside of shop". Trains. Kalmbach Media. Archived from the original on May 2, 2019. Retrieved May 2, 2019.
Wrinn, Jim (March 31, 2020). "Union Pacific No. 3985's next stop". Trains. Kalmbach Media. Archived from the original on January 17, 2021. Retrieved June 23, 2021.
Wrinn, Jim (May 3, 2019). "Big Boy debuts with test run". Trains. Kalmbach Media. Archived from the original on May 3, 2019. Retrieved May 3, 2019.
Gruver, Mead (May 9, 2019). "Massive restored locomotive steaming to Ogden for Thursday Golden Spike gathering". The Salt Lake Tribune. Archived from the original on April 21, 2024. Retrieved January 8, 2025.
Scott, Ramsey (May 4, 2019). "The Big Boy leaves the shop and heads into history". Wyoming Tribune Eagle. Archived from the original on May 4, 2019. Retrieved June 7, 2019.
Sweeney, Steve (May 4, 2019). "UP steam crew has Big Boy ready to roll". Trains. Kalmbach Media. Archived from the original on May 6, 2019. Retrieved July 17, 2019.
Keefe, Kevin (January 17, 2020). "The Challenger at high tide". Classic Trains. Kalmbach Media. Archived from the original on May 11, 2021. Retrieved June 23, 2021.
"World's Largest Steam Locomotive Returns to the Rails as Union Pacific Commemorates Transcontinental Railroad's 150th Anniversary" (Press release). Union Pacific. March 14, 2019. Archived from the original on May 2, 2019. Retrieved May 2, 2019.
Wrinn, Jim (May 4, 2019). "Big Boy christened, begins trip to Golden Spike celebration". Trains. Kalmbach Media. Archived from the original on May 5, 2019. Retrieved May 5, 2019.
O'Donoghue, Amy (May 9, 2019). "Thousands turn out as Big Boy locomotive rolls into Ogden". Deseret News. Archived from the original on May 9, 2019. Retrieved May 12, 2019.
"Union Pacific Recreates Historic Steam Meet, Commemorating 150th Anniversary of the Transcontinental Railroad's Completion" (Press release). Union Pacific. May 9, 2019. Archived from the original on June 11, 2019. Retrieved June 11, 2019.
"Union Pacific's Big Boy No. 4014 Locomotive Prepares for 'Great Race Across the Midwest'" (Press release). Union Pacific. June 13, 2019. Archived from the original on July 8, 2019. Retrieved July 8, 2019.
"Union Pacific's Big Boy No. 4014 Locomotive Concludes 150th Anniversary Celebration with 'Great Race Across the Southwest'" (Press release). Union Pacific. September 5, 2019. Archived from the original on September 6, 2019. Retrieved September 28, 2019.
Obert, Elizabeth (July 14, 2019). "Historic locomotive Big Boy No. 4014 rolls into St. Paul". St. Paul Pioneer Press. Archived from the original on May 11, 2021. Retrieved November 16, 2022.
"Festival of Steam with Big Boy No. 4014". Lake Superior Railroad Museum. Archived from the original on July 26, 2019. Retrieved March 7, 2021.
Bodiford, Vince (April 29, 2020). "Union Pacific Big Boy #4014 steam tour cancelled". The Cheyenne Post. Archived from the original on May 16, 2020. Retrieved May 23, 2021.
"Full Steam Ahead: World's Largest Steam Locomotive Returns with 'The Big Boy 2021 Tour'" (Press release). Union Pacific. June 14, 2021. Archived from the original on June 14, 2021. Retrieved June 17, 2021.
Kratville-Wrinn, Cate (May 13, 2022). "Original Big Boy tender to be restored by Railroading Heritage of Midwest America". Trains. Kalmbach Media. Archived from the original on May 13, 2022. Retrieved May 16, 2022.
"Union Pacific, Railroading Heritage of Midwest America reach agreement to preserve historic locomotives, passenger cars" (Press release). Railroading Heritage of Midwest America. Archived from the original on April 28, 2022. Retrieved May 2, 2022.
Glischinski, Steve (April 28, 2022). "Railroading Heritage of Midwest America, Union Pacific agree to donation of Challenger, other locomotives, cars". Trains. Kalmbach Media. Archived from the original on April 28, 2022. Retrieved May 2, 2022.
Franz, Justin (June 30, 2022). "Union Pacific 'Big Boy' to Visit Denver in July". Railfan & Railroad. White River Productions. Archived from the original on July 1, 2022. Retrieved July 1, 2022.
"Union Pacific Announces Big Boy No. 4014 July Trip between Denver and Cheyenne" (Press release). Union Pacific. July 21, 2022. Archived from the original on July 21, 2022. Retrieved July 29, 2022.
"World's Largest Steam Locomotive 'Big Boy No. 4014' Returns to the Tracks to Celebrate 160 years of Union Pacific" (Press release). Union Pacific. April 11, 2022. Archived from the original on April 11, 2022. Retrieved April 11, 2022.
"Union Pacific Postpones Big Boy No. 4014 West Coast Steam Tour" (Press release). Union Pacific. April 22, 2022. Archived from the original on April 23, 2022. Retrieved April 23, 2022.
"Union Pacific Fires Up 'Big Boy' to Move Rare 2-10-2". Railfan & Railroad. White River Productions. September 15, 2022. Archived from the original on May 29, 2023. Retrieved November 27, 2023.
Sanchez, Cesar (November 19, 2022). "3 of the largest and rarest locomotives arrive in Silvis". WQAD-TV. Archived from the original on January 5, 2023. Retrieved May 31, 2024.
"Union Pacific announces Big Boy trip to Omaha". Trains. Kalmbach Media. May 19, 2023. Archived from the original on May 19, 2023. Retrieved May 19, 2023.
"Union Pacific's Historic 'Big Boy No. 4014' Set to Score a Home Run During College World Series" (Press release). Union Pacific. May 19, 2023. Archived from the original on May 22, 2023. Retrieved June 21, 2023.
Johnson, Greg (July 10, 2023). "Wyoming's Big Boy 4014 Locomotive Rescues Freight Train Stuck In Nebraska". Cowboy State Daily. Archived from the original on July 10, 2023. Retrieved July 10, 2023.
"UP placing two tickets on sale today for Big Boy cab rides". Trains. Kalmbach Media. June 23, 2023. Archived from the original on June 27, 2023. Retrieved July 5, 2023.
"UP Museum holds auction for Big Boy cab ride". Trains. Kalmbach Media. June 5, 2023. Archived from the original on June 5, 2023. Retrieved June 27, 2023.
"Union Pacific 'Big Boy' 4014 Heads West in July". Railfan & Railroad. White River Productions. April 10, 2024. Archived from the original on April 10, 2024. Retrieved April 24, 2024.
"UP 4014 Celebration - July 2024". www.wplives.org. Archived from the original on July 5, 2024. Retrieved July 13, 2024.
Jean, Renée (September 17, 2024). "Jay Leno Climbs Aboard Cheyenne's Big Boy Locomotive For His TV Show". Cowboy State Daily. Archived from the original on September 19, 2024. Retrieved September 23, 2024.
"Big Boy 4014 gets drivers; UP asks for PTC waivers for three steam locomotives". Trains. Kalmbach Media. December 13, 2018. Archived from the original on June 8, 2019. Retrieved June 9, 2019.
Wrinn, Jim (February 28, 2019). "FRA: UP doesn't need waiver to run steam 11,000 miles in 2019". Trains. Kalmbach Media. Archived from the original on June 9, 2019. Retrieved June 9, 2019.
"Big Boy Flexes Its Muscles with Positive Train Control". Inside Track. Union Pacific. August 19, 2021. Archived from the original on August 20, 2021. Retrieved August 20, 2021.
"UP 4014 First Main Line Steam Locomotive Outfitted With PTC". Railfan & Railroad. White River Productions. August 20, 2021. Archived from the original on August 20, 2021. Retrieved October 14, 2022.
"Diesel helpers often lend a hand on mainline steam excursions". Trains. Kalmbach Media. March 8, 2024. Archived from the original on March 29, 2024. Retrieved May 26, 2024.
"'Big Boy' 4014 Runs on Main Line Solo With New PTC System". Railfan & Railroad. White River Productions. May 23, 2024. Archived from the original on May 25, 2024. Retrieved May 26, 2024.
"Union Pacific to renumber SD70M No. 4014 before Big Boy runs". Trains. Kalmbach Media. June 27, 2018. Archived from the original on October 18, 2018. Retrieved April 28, 2019.
"Diesel No. 4014 gets new number ahead of Big Boy debut". Trains. Kalmbach Media. May 16, 2019. Archived from the original on May 28, 2019. Retrieved May 28, 2019.

wplives.org

"UP 4014 Celebration - July 2024". www.wplives.org. Archived from the original on July 5, 2024. Retrieved July 13, 2024.

wqad.com

Sanchez, Cesar (November 19, 2022). "3 of the largest and rarest locomotives arrive in Silvis". WQAD-TV. Archived from the original on January 5, 2023. Retrieved May 31, 2024.

wyomingnews.com

Fike, Ellen (August 20, 2017). "Big Boy 4014 restoration still set for completion in 2019". Wyoming Tribune Eagle. Archived from the original on January 14, 2019. Retrieved June 7, 2019.
Scott, Ramsey (May 4, 2019). "The Big Boy leaves the shop and heads into history". Wyoming Tribune Eagle. Archived from the original on May 4, 2019. Retrieved June 7, 2019.

wyomingpublicmedia.org

Rader, Anna (May 8, 2014). "Union Pacific Big Boy 4014 Arrives In Cheyenne". Wyoming Public Radio. Archived from the original on October 1, 2015. Retrieved April 30, 2019.