1901
Murray-Aaron, Eugene, 1852-1941.
1956
Shell Oil Company
1:38k
1922
Portland Chamber of Commerce
1909
Cram, George Franklin; Davis, Ellis Arthur
1:35k
1905
U. S. Geological Survey
1:63k
1888
C&GS
1:40k
1888
C&GS
1:40k
1956
Shell Oil Company
1888
Northern Pacific Railroad Company
1:380k
1858
U.S. General Land Office
1:1m