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1965 Map of Blanca

Name: 1965 Topographic Map of Blanca
Creator: U.S. Geological Survey
Published: 1982
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1982

About this map

Blanca sits at the intersection of rail and road in this 1965 survey of the San Luis Valley, updated with revisions from the late 1970s. The town is a focal point for the Denver and Rio Grande Western railroad, which cuts a straight line across the valley floor. The landscape is defined by the massive Sangre de Cristo Grant Boundary and the essential water management systems required for high-altitude agriculture, including the Garland Ditch and an Aqueduct system leading toward the Basaltic Hills.

South of the settlement, the Smith Reservoir dominates the drainage basin where Sangre de Cristo Creek and Trinchera Creek converge. The presence of the Blanca Airport and the Southern San Luis Valley Elevated road indicate the area's role as a regional transport hub. Scattered wells and a Gaging Station further illustrate the historical reliance on groundwater and controlled irrigation in this part of Costilla County.