Several streets including 99E remained closed in the area around the old mill for most of the day, reopening shortly after 4 p.m. Ash and debris continued to smolder throughout the evening as at least one fire crew remained on scene to monitor a couple of small spot fires.

At about 3:46 a.m., Clackamas Fire crews were called out to a fire at 419 Main Street. The fire was on the Blue Heron property, which is an abandoned paper mill now owned by the Confederated Tribes of Grand Ronde as part of their reclaiming of ancestral homelands.

Firefighters battled a 3-alarm blaze at the old Blue Heron paper mill in Oregon City Thursday morning, Clackamas Fire reported. Officials closed Highway 99E as fire crews tackled the blaze. Firefighters responded to reports of a fire at about 3:45 a.m., according to reports.

Crews remain on the scene hours after a fire engulfed the Blue Heron paper mill in Oregon City. Read online: President Donald Trump began his White House briefing Thursday with a moment of silence and a prayer for victims of Wednesday's crash at Reagan National Airport.

The fire was called in around 3:45 a.m. Thursday. Both McLoughlin Boulevard and Main Street in Oregon City are also closed.