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1978 Map of Zion Reservoir

Name: 1978 Topographic Map of Zion Reservoir
Creator: U.S. Geological Survey
Published: 1978
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1978

About this map

Water management in this arid stretch of the High Plateau is the defining characteristic of this 1970s landscape, centered on the Zion Reservoir and the Little Colorado River. The map details an intricate system of irrigation including the Upper Lyman Ditch, Middle Lyman Ditch, and Lower Lyman Ditch, which divert water toward the agricultural lands surrounding St Johns. This infrastructure allowed for the expansion of ranching and farming in a region otherwise dominated by drainages like Carrizo Wash and Big Hollow Wash.

On the southern edge of the sheet, the northern reaches of the city are visible, featuring the St Johns Airport and the County Fairgrounds. Distinctive landmarks such as Twin Buttes and the prominent Black Ridge provide navigational context, while smaller family or local sites like Heap Place offer specific points of interest for genealogists and local historians tracing the development of Apache County.