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1989 Map of Cleghorn Flat

Name: 1989 Topographic Map of Cleghorn Flat
Creator: U.S. Geological Survey
Published: 1989
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1989

About this map

The Madeline Plains dominate the northern reaches of this Lassen County terrain, giving way to the complex topography of Cleghorn Flat to the south. This 1989 provisional survey captures a landscape defined by water management and remote landmarks, notably the Dry Valley Cemetery located near the western margin. The region's reliance on seasonal and spring-fed water sources is evident through a network of small catchments, including Pinecone Reservoir, Steel Post Reservoir, and Elmers Reservoir.

Erosion has carved distinct features such as Whiskey Canyon and Chase Canyon, where Chase Spring emerges. The map documents early-to-mid 20th-century land use with labels for a Borrow Pit and several named flats like McCoy Flat. This record of northeastern California reveals a sparsely settled interior where family-named features and small-scale infrastructure like Bill Reservoir No 1 and Glade Reservoir mark the local geography.