
The North Fork Malheur River flows through the high desert landscape of eastern Oregon, where the impounded waters of the Beulah Reservoir dominate the local geography. This remote settlement area, focused around the small community of Beulah, shows a distinct pattern of land use centered on water management and ranching. The presence of the Agency Valley Dam and nearby Agency Valley Cemetery suggests a community shaped by the early 20th-century irrigation projects that transformed the Agency Valley.
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1908 · Ironside Mountain
USGS Topo · 1:125,000
1955 · Burns
USGS Topo · 1:250,000
1955 · Canyon City
USGS Topo · 1:250,000
1958 · Burns
USGS Topo · 1:250,000
1959 · Burns
USGS Topo · 1:250,000
1959 · Canyon City
USGS Topo · 1:250,000
1966 · Beulah
USGS Topo · 1:62,500
1968 · Drewsey
USGS Topo · 1:62,500
1970 · Flag Prairie
USGS Topo · 1:62,500
1970 · Castle Rock
USGS Topo · 1:62,500