
The Lewis River and the massive reservoir of Lake Merwin Elevation 239 dominate this 1970s landscape on the border of Cowlitz and Clark Counties. The presence of the Merwin Dam, its Powerhouse, and a nearby Substation highlight the significance of hydroelectric power in the region's development. Smaller settlements such as Ariel, Etna, and Highland are scattered throughout the hills, connected by a network of rural routes like Dall Road and Peart Road.
48 named features on this map. Tap any name to fly to it.
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2 editions found
1919 · Mount St Helens
USGS Topo · 1:125,000
1940 · La Center
USGS Topo · 1:62,500
1941 · Yacolt
USGS Topo · 1:62,500
1943 · Pigeon Springs
USGS Topo · 1:62,500
1948 · Vancouver
USGS Topo · 1:250,000
1950 · Vancouver
USGS Topo · 1:250,000
1950 · Vancouver
USGS Topo · 1:250,000
1953 · Hoquiam
USGS Topo · 1:250,000
1953 · Pigeon Springs
USGS Topo · 1:62,500
1953 · Cougar
USGS Topo · 1:62,500