The GS4 Southern Pacific 4449 locomotive carries roughly 200 people during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015. The historic locomotive uses 10 gallons of fuel and 100 gallons of water per every mile it travels. It can store 23,000 gallons of water and 6,000 gallons of fuel.

The GS4 Southern Pacific 4449 locomotive carries roughly 200 people during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015. The historic locomotive uses 10 gallons of fuel and 100 gallons of water per every mile it travels. It can store 23,000 gallons of water and 6,000 gallons of fuel.

 Kaleb Chesnut, 3, looks up at the GS4 Southern Pacific 4449 locomotive after riding inside the historic locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

Kaleb Chesnut, 3, looks up at the GS4 Southern Pacific 4449 locomotive after riding inside the historic locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

 A spectator covers his ears as the GS4 Southern Pacific 4449 locomotive departs with roughly 200 people during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015. The historic locomotive uses 10 gallons of fuel and 100 gallons of water per every mile it travels. It can store 23,000 gallons of water and 6,000 gallons of fuel.

A spectator covers his ears as the GS4 Southern Pacific 4449 locomotive departs with roughly 200 people during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015. The historic locomotive uses 10 gallons of fuel and 100 gallons of water per every mile it travels. It can store 23,000 gallons of water and 6,000 gallons of fuel.

 People ride the GS4 Southern Pacific 4449 locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

People ride the GS4 Southern Pacific 4449 locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

 Dick Raub, left, and Stuart Adams, both with the Oregon Rail Heritage Center, talk as they work inside the GS4 Southern Pacific 4449 locomotive during the Holiday Express event in Portland on Saturday, Dec., 19, 2015.

Dick Raub, left, and Stuart Adams, both with the Oregon Rail Heritage Center, talk as they work inside the GS4 Southern Pacific 4449 locomotive during the Holiday Express event in Portland on Saturday, Dec., 19, 2015.

 Children get their picture taken with Santa Claus inside the GS4 Southern Pacific 4449 locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

Children get their picture taken with Santa Claus inside the GS4 Southern Pacific 4449 locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

 Ella Mae Moore, 4, looks out the window while riding the GS4 Southern Pacific 4449 locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.

Ella Mae Moore, 4, looks out the window while riding the GS4 Southern Pacific 4449 locomotive during the Holiday Express event hosted by the Oregon Rail Heritage Center in Portland on Saturday, Dec., 19, 2015.