The National Park Service has extended the locomotive operation at Golden Spike National Historic Site for two weeks, until Oct. 16, park superintendent Denny Davies says.

"This is an experiment," Davies said, noting the upcoming three-day Columbus Day holiday for state and federal workers and the four-day Utah Education Association school break beginning Oct. 13."We are going to keep accurate records on the visitation levels to see if the number of visitors justifies the longer operation," the superintendent said.

Normally, the replica locomotives are retired for winter maintenance the first week in October, Davies said. But the engines "Jupiter" and "No. 119" will remain on display for the extra two weeks.

The visitors center at the park 32 miles west of Brigham City is open 8 a.m. to 4:30 p.m. seven days a week.