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2020 Map of Bologna Basin

Name: 2020 Topographic Map of Bologna Basin
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

The North Fork John Day River carves a deep path through this corner of Grant County, where the southern boundary of the Umatilla National Forest meets a landscape of drainages and named summits. The terrain is defined by its complex network of canyons and gulches, notably Portuguese Canyon and the evocatively named Wagon Road Gulch. High points like Thorn Spring Butte, Negro Knob, and Ant Hill oversee a dry landscape punctuated by vital water sources such as Bologna Spring, Tommy Cork Spring, and Putnam Spring.

Human activity is concentrated along the river corridor and the local road network, including Cupper Creek Rd and Rudio Rd. The presence of Alkali Flats in the southeast and the sharp river turn at Big Bend indicate the varied geological and hydrological character of the basin. This survey provides a clear look at the transitional zone where forested federal lands give way to the rugged canyons of the John Day river system.