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1990 Map of O'Brien

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

USGS Topo · Published 1990

About this map

Shasta Lake dominates this 1990 survey, showing the complex interaction of the Mc Cloud River Arm, Pit River Arm, and Salt Creek Inlet. The landscape is a mix of recreational development and industrial remnants, notably the Shasta Iron Mine situated near the waters of the Pit River Arm. The settlement of O'Brien sits as a central point of land-based access, flanked by O'Brien Mountain and numerous inlets like Halfway Cove.

Significant recreational infrastructure is visible throughout the Whiskeytown-Shasta-Trinity National Recreation Area, from the Seaplane Base on the water to the famous Lake Shasta Caverns near North Gray Rocks. The presence of multiple campgrounds such as Nelson Point Campground and Hirz Bay Campgrounds highlights the region's mid-century transition into a major tourism hub. Transportation is anchored by the Pit River Bridge, a critical link across the reservoir's expansive arms.