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1990 Map of Big Swamp

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

USGS Topo · Published 1990

About this map

Ash Creek State Wildlife Area dominates this portion of the Big Valley basin along the border of Lassen and Modoc counties. The terrain is characterized by the expansive wetland of the Big Swamp and the seasonal hydrology of Ash Creek. To the north, the landscape rises into the timbered slopes of the Modoc National Forest, marked by volcanic features like Roberts Butte and Pilot Butte.

Evidence of local habitation and land use is centered around Lookout Rancheria and various water sources including Kellog Hot Springs and O'Neals Springs. The map illustrates a network of 4wd tracks and irrigation canals that supported ranching and resource management in the late twentieth century. Notable geographic landmarks such as Barber Ridge and the deep cuts of Hays Canyon provide distinct vertical relief against the surrounding alluvial flats.