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Union Pacific’s newly restored Big Boy No. 4014 was delivered to Union Pacific in 1941. The massive steam engine trekked across Nebraska this week, stopping in various communities. Once it completes its Omaha visit, it will take passengers from Omaha to Boone, Iowa, on Monday.

Families can celebrate the region’s railroad heritage at a half-dozen locations in Omaha and Council Bluffs this weekend.

The star of the show will be Union Pacific’s Big Boy 4014 steam engine, which rolled out of North Platte on Thursday, stopping for the night in Grand Island. Flooding in south-central Nebraska had halted the steam engine’s trip across Nebraska. The 1940s-era train engine is the largest working steam engine in the world.

One of Big Boy’s stops was to be Gibbon, Nebraska, a community now in a major flood fight against the Wood River, which has jumped more than 10 feet this week.

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“We can’t say enough about the work our crews did to get Big Boy going again,” U.P. spokeswoman Raquel Espinoza said Thursday. “They were pouring rock ballast to stabilize the line (Wednesday) night.”

Big Boy traveled to Lexington and, instead of Gibbon, stopped in Kearney before ending up in Grand Island. It will continue the journey Friday, with brief stops in Central City, Columbus and Fremont before arriving in Omaha near 12th and Cuming Streets about 5:45 p.m.

The steam engine is 132 feet long and weighs 1.2 million pounds. It will spend Friday evening through Sunday morning in Omaha as part of Railroad Days and Union Pacific’s 150th anniversary celebration.

To participate in Railroad Days, people can buy a $15 family pass, which gives families admission and transportation by bus (in Omaha) or trolley (in Council Bluffs) to these venues:

Union Pacific’s Home Plate, outside TD Ameritrade Park at 12th and Cuming Streets. This is where people can see Big Boy No. 4014 for the first time since it underwent two years of restoration. Also at this site is the Experience rail car, a multimedia walk-through exhibit. Both will be open for public viewing until 4 p.m. Saturday and until 11 a.m. Sunday, when the public will move a safe distance away before the train departs.

Durham Museum, 801 S. 10th St. Visit the former Union Station to see model trains, talk with model railroad experts, listen to “Freight Train” Frank’s music and see the museum’s exhibits.

Lauritzen Gardens, 100 Bancroft St. Visit two locomotives, Centennial No. 6900 and Big Boy No. 4023, at Kenefick Park. Look for the G-scale model train lines winding through replicas of Omaha landmarks.

Historic General Dodge House, 605 Third St., Council Bluffs. The preserved 1869 Victorian home offers a glimpse of how railroad builder and Civil War Gen. Grenville M. Dodge lived.

Union Pacific Railroad Museum, 200 Pearl St., Council Bluffs. See artifacts from the completion of the transcontinental railroad 150 years ago. On the hour from 11 a.m. to 2 p.m., Chinese Lion Dances will be performed.

RailsWest Railroad Museum, 1512 S. Main St., Council Bluffs. The museum features displays and artifacts from rail lines that passed through Council Bluffs. In the train yard, visitors can climb aboard old steam engines and cabooses.

New this year: An additional stop on the trolley loop is a stop in the 100 Block of West Broadway for $5 food and drink options and restrooms.

Family passes can be purchased at any of the venues Saturday or Sunday. Hours are 9 a.m. to 5 p.m. One $15 pass admits two adults and their dependent children or two grandparents and up to four grandchildren for both days. A $5 pass also is available for one additional adult with purchase of a family pass.

For more information, go to: www.omaharailroaddays.com.