BAILEYVILLE, Maine — A woman employed by a contractor working on the tissue expansion project at the Woodland Pulp mill in Baileyville was taken to the hospital Monday morning after she was injured in a workplace accident, a mill official confirmed Monday evening.

The woman, whose name was not released, was taken to Calais Regional Hospital for treatment of leg injuries, mill spokesman Scott Beal said Monday night. Information about the woman’s medical condition was not available.

Beal said the woman was struck in the legs by falling debris. He said that the Occupational Safety and Health Administration was informed of the accident and that the contractor and the mill are investigating.

Woodland Pulp, an affiliate of St. Croix Tissue, is in the midst of a $120 million expansion that will add two tissue machines at its Baileyville mill, located along the border with New Brunswick.

Announced in March 2014, the expansion is expected to add as many as 80 jobs at the mill, according to earlier reports.

The original plan was to start one of the tissue machines in the fourth quarter of last year, but the start time has been revised to early 2016, Beal said last year. The startup of the second tissue machine, originally set to be running in the first quarter of 2016, has been pushed back to the second quarter, Beal said.

Despite the delay, the spokesperson said, Woodland Pulp had hired a total of 71 new employees as of Aug. 24, 2015, to run the tissue mills.