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1985 Map of Pearl

Name: 1985 Topographic Map of Pearl
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

Pearl sits at the heart of this mid-1980s survey, a settlement defined by the mining legacy of the surrounding hills. The landscape is heavily marked by industrial activity, with numerous prospects and a specific Mine Shaft located near Prospect Peak. These markings reveal the persistent search for mineral wealth in the high ground between the drainage basins of the area's many waterways.

Water management and natural flow dominate the terrain, from the Siphon Lakes in the northeast to the complex network of the Willow Creek system. The map details the confluence of the North Fork Willow Creek and South Fork Willow Creek, alongside seasonal and permanent flows like Spring Valley Creek, Alkali Creek, and Big Gulch Creek. The intersection of Gem, Boise, and Ada counties occurs in the rugged southern portion of the quadrangle, illustrating the political boundaries that bisect these prominent ridges and gulches.