
The Grande Ronde Valley forms the heart of this landscape, where agricultural land meets the steep western slopes of Mt Harris. The settlement of Imbler serves as a central hub, flanked by the smaller communities of Summerville to the northwest and Alicel to the south. This region is characterized by a sophisticated water management system designed for the valley's fertile soils, featuring the Grande Ronde River, the State Ditch, and numerous family-named irrigation projects such as the Bill Howell Reservoir and Arnoldus Loop Reservoir.
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This is the sole edition of this map. No revisions or reprints were ever made.