The Umatilla National Forest Aerial Photographs consist of several aerial photographs from the BTU project made by the U.S. Forest Service in 1939 as well as a complete mosaic photo index of the BTU project.
0.2 cubic foot, including 13 photographs; 1 oversize box
Other maps of Umatilla County are part of the Metsker's Atlaes of Oregon Counties (MAPS Metsker) and the Highway Maps of Oregon Counties (MAPS Highway). The E.R. Jackman Photographic Collection (P 089) includes images of Umatilla County. The Special Collections & Archives Research Center also has aerial photographs of the Siuslaw National Forest (P 292).