Full containment of the American fire is expected Thursday, two days earlier than previously projected.
The U.S. Forest Service reported this evening in an online update that the fire, burning since Aug.10 northeast of Foresthill in Placer County, is 83 percent contained with 24,684 acres burned. A total of 1,283 people remain involved in the firefighting effort.
Officials reported that crews have completed burning operations next to Mosquito Ridge Road, along the fire's eastern perimeter. The burning was conducted to reduce ground fuels between the fire perimeter and the main fire to help prevent the main fire from escaping containment lines.
Fire crews also have begun repairing areas affected by firefighting activities.
Some roads remain closed in the fire area to protect visitors and firefighters, officials said. Roads and areas that are closed have been deemed unsafe due to fire-weakened, burned trees that could fall, as well as heavy smoke causing poor visibility.