1979 Map of Tyonek A-1 NW

About this map

Fire Island sits at the strategic convergence of the Alaskan coast where the waters of the Cook Inlet split into the Knik Arm and Turnagain Arm. This 1979 survey, updated in the early 1990s, documents the maritime environment and low-lying topography of the Susitna Flats to the north, much of which is protected within the Susitna Flats State Game Refuge. The island itself is marked by technical infrastructure including a Radio Facility and a Heliport, reflecting its role in regional communications and aviation near Anchorage. The shifting nature of the glacial silt and tides is evident in the expansive Fire Island Shoal and West Point Shoal, which create a complex navigation environment around Shelter Bay.