The North Fork Toutle River valley dominates this landscape, showing the ongoing management of volcanic sediment decades after the Mount St. Helens eruption. Engineering efforts are central to the area, evidenced by major structures like the Toutle Dam and the twin debris retention works, North Fork Toutle Debris Dam A and North Fork Toutle Debris Dam B. These features, along with the Debris Dam Viewpoint, reflect the region's unique geographical challenges and its importance for flood and sediment control.
15 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1919 · Mount St Helens
USGS Topo · 1:125,000
1942 · Toutle
USGS Topo · 1:62,500
1943 · Pigeon Springs
USGS Topo · 1:62,500
1953 · Hoquiam
USGS Topo · 1:250,000
1953 · Toutle
USGS Topo · 1:62,500
1953 · Pigeon Springs
USGS Topo · 1:62,500
1953 · Cougar
USGS Topo · 1:62,500
1953 · Elk Rock
USGS Topo · 1:62,500
1957 · Hoquiam
USGS Topo · 1:250,000
1958 · Hoquiam
USGS Topo · 1:250,000