Loading map...

1969 Map of Threemile Hill

Name: 1969 Topographic Map of Threemile Hill
Creator: U.S. Geological Survey
Published: 1973
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1973

About this map

Jordan Creek defines the lower drainage of this high-desert landscape in Malheur County, where the 1969 field survey reveals a complex system of water management. The irrigation infrastructure is anchored by the Arock Diversion Dam, which feeds the North Side Canal and South Side Canal to support agriculture in an otherwise arid environment characterized by extensive lava fields and basaltic formations like Merrill Rim.

Named natural landmarks such as Threemile Hill, Holdup Rock, and Dixons Rock provided essential orientation for ranchers and travelers moving across a network of jeep trails. Remote ranching activity is further evidenced by a Landing Strip and small water catchments including Saddle Butte Reservoir and Dixons Rock Reservoir. The presence of the Sequenca Rock Trap along the creek bank underscores the specialized land use required in this volcanic terrain.