Series 2. Concessions Records 1919-2002
Series Scope and Content Summary
Subseries A. Private land 1929-2002 1977-1980
Subseries Scope and Content Summary
Subseries B. Utility permits 1919-1991 1977-1980
Subseries Scope and Content Summary
Subseries C. Recreation permits. 1936, 1965-1977
Subseries Scope and Content Summary
Subseries D. Grazing permits. 1941-1995
Series 3. Safety records 1904-2002 1986-1999
Series Scope and Content Summary
Subseries B. Threats and protection 1957-2002 1985-1997
Subseries Scope and Content Summary
Subseries 3. Hazardous waste disposal 1980-2002
Subseries Scope and Content Summary