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1968 Map of Lyons

Name: 1968 Topographic Map of Lyons
Creator: U.S. Geological Survey
Published: 1968
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1968

About this map

Lyons serves as the focal point of this 1968 study, situated where the North St Vrain Creek and South St Vrain Creek converge. The landscape is defined by its water management and industrial infrastructure, featuring the St Vrain Supply Canal, an extensive Aqueduct, and the Longmont Powerplant. Numerous quarries dot the terrain around Steamboat Mountain and Indian Lookout Mountain, indicating a landscape shaped by active extraction and utility production during the late 1960s.

To the south, the settlement of Altona is anchored by the Altona Grange and sits near a historic Toll Gate. The map details the rugged eastern edge of the Roosevelt National Forest, where deep drainage systems like Deadman Gulch and Plumely Canyon cut through the foothills. Traceable ruins and family-named features like the Nelson Road Ditch provide valuable context for researchers investigating the agricultural and industrial development of Boulder County before modern suburban expansion.