1952 Map of Michigan Bluff

About this map

The Forest Hill Divide serves as the topographic spine of this Gold Country landscape, separating the intricate drainages of the Middle Fork American River and the North Fork American River. By the mid-20th century, the era of intensive hydraulic mining is preserved in labels like Big Gun Diggings near the settlement of Michigan Bluff. The map records a transition from active industry to archaeological memory, noting numerous former habitations such as Sunny South (Site), Deadwood (Site), and Last Chance (Site). The terrain is defined by steep ridges like Volcano Ridge and Mosquito Ridge, where dozens of hard-rock operations including the Hidden Treasure Mine and Mountain Chief Mine once operated. This survey documents the complex water-conveyance infrastructure and remote mining camps that shaped the Placer County high country.