Folding maps (many of them forest maps)

• U.S. Forest Service maps for various locations in Oregon (1979 to 2001): 74 
  
• Bureau of Land Management maps and recreation guides for various locations in Oregon (1991 to 1998): 27
  
• Geo-graphics / Imus Geographics recreation maps for various locations in Oregon (1985 to 1995): 14
  
• Rand McNally Portland street map (2007): 7
  
• Rand McNally Salem/Woodburn street map (2008): 2
  
• Oregon Bicycling Guide (OR Dept. of Transportation, 1992): 1
  
• Springwater Corridor map (Portland Parks & Rec., 1996): 1
  
• Oregon Trail map (Oregon State Hwy. Div., 1976): 1
  
• Oregon Trail map (Cecile Alyce Nolan, 1992): 1
  
• U.S. Forest Service maps for locations in California (1985 to 2001): 10
  

USGS Maps
Apparently complete sets of 1:24,000 scale 7.5 minute maps of other US states west of the Continental divide, many with folding indexes:

• Arizona
  
• Colorado
  
• Hawaii
  
• Idaho
  
• Montana
  
• Nevada
  
• New Mexico
  
• Utah
  
• Wyoming
  
• Guam
  
• Puerto Rico
  
• U.S. Virgin Islands
  

The sets are largely in good, usable condition.  Some more frequently-used maps are worn (bent edges, repaired tears, rumpled appearance)
DMA (AMS) Maps
We have two sets from the Army Map Service (AMS), later the Defense Mapping Agency (DMA), with some individual maps missing :

• 1301 series (scale 1:1,000,000)
  
• 1501 series (scale 1:250,000)
  

Most of these have publication dates ranging from the mid 1950s to the mid 1960s and are in serviceable condition, though some are a bit worn. It is a large collection of maps, taking up almost 50 flat map case drawers.
JNC Maps
Jet Navigation Charts are long range navigation graphics specifically designed to meet the requirements of users in high altitude (25,000 to 50,000) feet above ground level, high speed aircraft. Each chart combines extensive area coverage with depiction of detail for navigation by radar, celestial, dead-reckoning and pilot age. The scale is 1:2,000,000 and 1:3,000,000.

Dates ranged from around 1969 to 1995. These charts show signs of use, but are still very serviceable and are durable enough for patron use and photocopying. The charts are folded, and take up about 10” of space in a filing cabinet drawer.