Diamond Valley dominates the landscape of north-central Eureka County, where a grid of numbered streets and rural roads meets the rising slopes of the surrounding basin. This high-desert region is defined by its drainage patterns, with several creeks including Simpson Cr and Slough Cr flowing toward the valley floor from the western edges, while Minoletti Cr and Cottonwood Cr originate from the eastern foothills. The map reveals a highly structured agricultural or grazing layout, evidenced by the regular alignment of routes like 9th St and 12th St. Access across the valley is anchored by Keg Rd and Co Rd 101, which serve as primary north-south corridors. In the east, Pedrioli Cr marks a transition into more varied terrain near Cottonwood Ranch Rd.
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This is the sole edition of this map. No revisions or reprints were ever made.
1926 · Roberts Mountains
USGS Topo · 1:250,000
1929 · Roberts Mountains
USGS Topo · 1:250,000
1949 · Garden Valley
USGS Topo · 1:62,500
1951 · Garden Valley
USGS Topo · 1:62,500
1953 · Eureka
USGS Topo · 1:62,500
1955 · Millett
USGS Topo · 1:250,000
1956 · Whistler Mtn
USGS Topo · 1:62,500
1956 · Ely
USGS Topo · 1:250,000
1957 · Diamond Springs
USGS Topo · 1:62,500
1959 · Ely
USGS Topo · 1:250,000