Alpowa Ridge and Valentine Ridge dominate this high-relief landscape along the border of Asotin and Garfield Counties. The terrain is defined by a series of deep drainage systems, including Davis Canyon and numerous gulches such as Megginson Gulch, Unfried Gulch, and Clayton Gulch. These natural corridors dictate the path of local infrastructure, where winding routes like Howell Grade Rd and Valentine Ridge Rd navigate the steep elevation changes.
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This is the sole edition of this map. No revisions or reprints were ever made.
1910 · Pullman
USGS Topo · 1:125,000
1943 · Peola
USGS Topo · 1:62,500
1945 · Clarkston
USGS Topo · 1:62,500
1946 · Peola
USGS Topo · 1:62,500
1948 · Clarkston
USGS Topo · 1:62,500
1955 · Pullman
USGS Topo · 1:250,000
1958 · Pullman
USGS Topo · 1:250,000
1964 · Kirby
USGS Topo · 1:24,000
1964 · Colton
USGS Topo · 1:24,000
1964 · Bishop
USGS Topo · 1:24,000