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1990 Map of Ash Valley

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

USGS Topo · Published 1990

About this map

Ash Valley defines this portion of northeastern California, where the high-elevation flats are irrigated by Ash Creek and numerous family-named springs. In 1990, the landscape remained characterized by ranching and resource extraction, with features like Fleming Sheep Camp and several Borrow Pits and a Gravel Pit scattered across the basin. The southern and western reaches of the sheet are dominated by the elevations of the Modoc National Forest, containing named peaks like Knox Mountain and Anderson Mountain.

Water management is central to the area's utility, evident in the construction of Holbrook Reservoir and Spooner Reservoir to capture seasonal runoff from Holbrook Canyon and Spooner Trough Canyon. A small Cem located near the valley floor suggests early settlement patterns. This map serves as a detailed record of the land use and topography in Lassen County toward the end of the 20th century, documenting isolated springs like Oxendine Spring and Fulstone Spring that have long supported local livestock operations.