South Umpqua River
Tsp. 31 S., Rng. 1 E.
1937 General Land Office Survey Index
The red line through the index indicates the souther boundary of the 2010 South Umpqua Headwaters Precontact Reference Conditions Study, including Butler Butte Fire Lookout and Bald Ridges Area of Special Interest. This survey was completed in 1923 and 1936, and mapped in 1925 and 1937 (Mensch 1923d; Carter 1936).