Firefighters have largely contained Northern California's 4,168-acre Tennant fire, which was contributing to the smoke blowing into the Rogue Valley in recent days.

Firefighters have largely contained Northern California's 4,168-acre Tennant fire, which was contributing to the smoke blowing into the Rogue Valley in recent days.

About 70 percent of the fire, which is some 30 miles west of Yreka in the Klamath National Forest, has been encircled by a fire line, according to fire officials. Firefighters were mopping up hot spots and strengthening the fire line, they added.

The objective is make sure the fire stays within the containment lines while minimizing fire damage to bald eagle nesting and winter roost habitat, historic and prehistoric resources, and riparian areas adjacent to Butte Creek, officials said.

Full containment is expected by Saturday.

Estimated cost of battling the blaze is $1.7 million. Cause of the fire is under investigation.

— Paul Fattig