2019 Map of McGrath B-1 SE

About this map

The Alaska Range dominates this landscape in the eastern interior, where high mountain ridges define the headwaters of several critical glacial drainage systems. The Tatina River cuts a significant valley through the center of the sheet, joined in the northeast by the Earl River. This 2019 survey documents the wild hydrography of the region before modern development, tracing the steep descent of Dalzell Cr through the southwestern peaks. The map also delineates the administrative boundary between the Yukon-Koyukuk Census Area and Bethel Census Area, providing a precise record of these remote census divisions in the early twenty-first century. For researchers and geographers, the topographic contours illustrate the complex glacial carving and high-altitude terrain that separates these two vast Alaskan districts.