Norman resident Elisabeth Leja went to jail Monday to show her opposition to the Keystone XL pipeline.
Leja, 74, was arrested Monday morning at a construction site between Paden and Boley in Okfuskee County, where TransCanada crews are working on the pipeline.
The retired teacher locked herself to a piece of equipment being used to build the 485-mile pipeline between the oil storage hub at Cushing and refineries on the Gulf Coast.
Okfuskee County Sheriff Jack Choate said Leja was arrested without incident after authorities cut the cable lock she used to attach herself to a track hoe. She is expected to face a trespassing charge.
A Keystone spokesman said the protest did not affect construction on the project, which is expected to be completed by the middle of this year.