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1990 Map of Chalk Mountain

Name: 1990 Topographic Map of Chalk Mountain
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

The Pit River carves a deep path through the northern reaches of the Shasta National Forest, where industrial utility and remote wilderness meet. This 1990 provisional map documents the hydroelectric infrastructure of the era, including the Pit 5 Dam and Pit 4 Dam, supported by an adjacent Powerhouse, Substation, and Surge tank. The landscape is defined by its significant relief, rising from the Pit 4 Reservoir to the heights of Chalk Mountain and Hatchet Mountain.

Smaller settlements and clearings like Hagen Flat and Oak Flat dot the terrain alongside numerous named springs such as Bedrock Spring and Bear Spring. To the south, the boundary of the Lassen National Forest encompasses Lake Margaret, while recreational points like the Deep Creek Campground are situated near the confluence of Deep Creek and the river. The map also records early-stage infrastructure like a Trans Line and several radio and gaging stations necessary for managing this remote resource-rich corridor.