Rye Grass Flat and its surrounding canyons define this corner of Franklin County, where the high plateau is deeply incised by drainages like Smith Canyon and McCoy Canyon. The landscape is etched with a network of rural routes that follow both the ridgelines and the coulee floors, including Rye Grass Coulee Rd and Haverland Koontz Rd. These roads often trace the boundaries of the Public Land Survey System, as seen in the strictly gridded townships of t11n r32e and t12n r32e. Along the eastern edge, Pasco Kahlotus Road provides the primary transit artery, while secondary paths like Fishhook Elgin Rd and Snake River Rd connect the scattered homesteads and agricultural tracts. The map reveals the intricate topographic relationship between the Rye Grass Coulee drainage system and the flat upland areas used for dryland farming.
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This is the sole edition of this map. No revisions or reprints were ever made.
1915 · Wallulah
USGS Topo · 1:96,000
1916 · Connell
USGS Topo · 1:125,000
1918 · Connell
USGS Topo · 1:125,000
1918 · Wallula
USGS Topo · 1:125,000
1953 · Walla Walla
USGS Topo · 1:250,000
1958 · Walla Walla
USGS Topo · 1:250,000
1963 · Rye Grass Coulee
USGS Topo · 1:24,000
1964 · Levey SW
USGS Topo · 1:24,000
1964 · Levey SE
USGS Topo · 1:24,000
1964 · Levey NE
USGS Topo · 1:24,000