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1967 Map of Tar Spring Ridge, 1977 Print
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1967 Map of Tar Spring Ridge

USGS Topo · Published 1977

About this map

Lake Lopez and the Lopez Dam dominate this landscape during a period of significant hydrological change in San Luis Obispo County. Surveyed in the mid-1960s, the map documents the reservoir's footprint while noting portions as under construction, capturing the transition of the Arroyo Grande drainage. The rugged interior is defined by Tar Spring Ridge and the southern reaches of the Los Padres National Forest, where steep canyons like Clapboard Canyon and Canyon de los Alisos cut through the Huasna region.

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Map Details

Date Portrayed1967
Date Published1977
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.7 inches

Editions of this 1967 Tar Spring Ridge Map

Historical Maps of San Luis Obispo County Through Time

287 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain