1955 Map of Umiat D-4

About this map

Naval Petroleum Reserve No. 4 encompasses the entirety of this 1955 survey area on the North Slope, revealing a landscape defined by an intricate network of thaw lakes and meandering watercourses. The eastern portion of the sheet is dominated by the winding path of the Kikiakrorak River, which flows through terrain marked by the Umiat Principal Meridian. Further west, the Ublutuoch River carves its way through the tundra, illustrating the complex drainage patterns characteristic of the Arctic coastal plain.