2019 Map of McGrath D-4 NW

About this map

The Kuskokwim River and its intricate drainage network dominate this Alaskan landscape within the Yukon-Koyukuk region. This 2019 survey captures a complex fluvial environment where the Middle Fork Kuskokwim River and the Big River wind through a territory defined by shifting channels and oxbow lakes. The absence of roads or established settlements on this sheet reflects the remote character of the interior, highlighting a wilderness where waterways serve as the primary geographical markers. Tracing the path of Blackwater Cr, researchers can observe the natural hydrological patterns of the subarctic plains before they meet the larger river systems. The map provides a high-resolution look at the terrain as it appeared in the early 21st century, documented by the U.S. Geological Survey using modern SPOT imagery.