
The Portland Railway Light & Power Co line dictates the industrial corridor of the early 20th century, stretching southeast through Boring toward the hydroelectric developments at River Mill and Cazadero. Along the Clackamas River, the infrastructure of early power generation is evident at the Upper Dam, while the northern reaches show the critical Intake Portland Waterworks within the Bull Run National Forest. These features highlight the region's role as a vital resource hub for the growing metropolitan area nearby.
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5 editions found
1897 · Portland
USGS Topo · 1:62,500
1905 · Portland
USGS Topo · 1:62,500
1911 · Boring
USGS Topo · 1:48,000
1914 · Boring
USGS Topo · 1:62,500
1914 · Oregon City
USGS Topo · 1:62,500
1916 · Estacada
USGS Topo · 1:125,000
1918 · Troutdale
USGS Topo · 1:62,500
1924 · Mount Hood
USGS Topo · 1:125,000
1926 · Hood River
USGS Topo · 1:125,000
1927 · Mount Hood
USGS Topo · 1:125,000