Firefighters were able to gain ground yesterday on the 800-acre Mangum Fire because of less windy conditions and the arrival of additional fire resources. On June 9, crews successfully began establishing potential boundaries to the wildfire's future growth along the eastern, northern and western perimeters. On June 10, firefighters plan to conduct burnout operations and establish dozer line to the north of the wildfire along Forest Road 769 as well as scouting for opportunities to construct hand line in key locations. Fire managers have identified areas that have been treated in the recent past with prescribed fire or other forest restoration treatments as potential locations to catch the growing wildfire.