
Lake Oroville and the Middle Fork Feather River dominate this 1970s survey, illustrating a landscape defined by water management and historic extractive industry. The map captures the transition from the deep river canyons of the Feather River Recreation Area to the high ridges of the Plumas National Forest. Settlement patterns are concentrated around Forbestown and Old Forbestown, while legacy infrastructure like the Old Lumpkin Grade Railroad and the Old Oregon Railroad Grade trace the region's logging and transport history.
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This is the sole edition of this map. No revisions or reprints were ever made.
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