Diablo Dam and Gorge Dam anchor this hydroelectric corridor along the Skagit River within North Cascades National Park. The map documents the industrial infrastructure supporting the regional power grid, including the Gorge Powerhouse and the Newhalem Creek Powerhouse near the settlement of Newhalem. This 2011 survey illustrates the precise relationship between the engineering of Gorge Lake and the formidable terrain of the North Cascades, where massive ice fields like Colonial Glacier and Neve Glacier overlook the river valley.
41 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.
1953 · Marblemount
USGS Topo · 1:62,500
1953 · Mt Challenger
USGS Topo · 1:62,500
1955 · Concrete
USGS Topo · 1:250,000
1958 · Concrete
USGS Topo · 1:250,000
1962 · Concrete
USGS Topo · 1:250,000
1963 · Eldorado Peak
USGS Topo · 1:24,000
1963 · Forbidden Peak
USGS Topo · 1:24,000
1963 · Diablo Dam
USGS Topo · 1:24,000
1963 · Ross Dam
USGS Topo · 1:24,000
1969 · Mt Prophet
USGS Topo · 1:24,000