2019 Map of McGrath D-1 NW

About this map

Birch Hills dominates the northeastern corner of this interior Alaskan landscape, providing a rare point of significant elevation in a region otherwise defined by complex drainage patterns. The hydrology of the area is centered on the Little Tonzona River, which meanders across the southern sections of the quadrangle. This 2019 survey illustrates the dense network of tributaries that feed the regional basin, including the Clear Fork and the waters of Jones Cr. The map reveals a wild, unpopulated territory within the Yukon-Koyukuk Census Area, where the movement of water across the terrain is the primary driver of the landscape. Researchers can trace the path of the S Fork Jones Cr as it winds through the central valley, illustrating the natural state of the Alaskan interior before any significant infrastructure development.