
Saddle Butte Lava Field dominates the central landscape of this Malheur County region, where the stark volcanic terrain transitions into the high elevations of the Sheephead Mountains. This 1980 survey reveals a complex water management system vital for the arid high desert, featuring numerous isolated catchments such as Johnny Creek Reservoir, Ryegrass Reservoir, and the remote Lonesome Reservoir. The presence of several Borrow Pits and Tailings along the eastern margins suggests active resource extraction related to local infrastructure or road building near the desert floor.
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1955 · Jordan Valley
USGS Topo · 1:250,000
1955 · Burns
USGS Topo · 1:250,000
1955 · Adel
USGS Topo · 1:250,000
1955 · Boise
USGS Topo · 1:250,000
1957 · Adel
USGS Topo · 1:250,000
1957 · Jordan Valley
USGS Topo · 1:250,000
1958 · Burns
USGS Topo · 1:250,000
1958 · Boise
USGS Topo · 1:250,000
1958 · Adel
USGS Topo · 1:250,000
1958 · Jordan Valley
USGS Topo · 1:250,000