The building was the location of the investigation into the tragic 1949 fire at Mann Gulch in the Helena National Forest .
The building has served as the headquarters for the Northern Region of the U.S. Forest Service since 1914 .
The building , which has served as the headquarters for the Northern Region of the U.S. Forest Service since 1914 , was the location of the investigation into the tragic 1949 fire at Mann Gulch in the Helena National Forest .