Ewan Bay lies on the eastern side of the Kenai Peninsula in Prince William Sound, and extends northwest for 3.5 miles (5.6 km) from Dangerous Passage, about 84 miles (135 km) west of Cordova and 33 miles (53 km) southeast of Whittier, Alaska. The U.S. Geological Survey recorded the local name in 1908, and Captain William F. Abercrombie of the U.S. Army named Dangerous Passage in 1898. The bay’s rugged, indented coastline reflects the region’s mountainous coastal terrain and glacially carved waterways. The two major rock groups in Prince William Sound, the Valdez Group to the north and the Orca Group to the south, have traditionally been assigned to the Chugach and Prince William terranes, respectively. However, detrital-zircon age data and geochemical similarities suggest a less distinct relationship. A study in 2019 suggests that the Orca Group consists of up to 75 to 88% recycled Valdez Group sediments derived from erosion between 62 million and 52 million years ago. These studies question whether the boundary between these groups represents a true terrane boundary, suggesting that sedimentary rocks in and around Prince William Sound may record a related geological history.

Prince William Sound has been the ancestral homeland of the Sugpiaq (Alutiiq) people for thousands of years. Archaeological evidence documents their long-standing presence, maritime traditions, and reliance on marine resources, and their communities and cultural practices continue today. At the head of Ewan Bay, tidal rapids known as skookumchucks separate the bay from a saltwater lagoon. The word comes from Chinook Jargon, a contact language that developed through trade and cultural exchange among Indigenous peoples and newcomers in the Pacific Northwest. Drawing on Chinookan languages as well as French and English, it spread along regional trade routes during the 18th and 19th centuries and was widely used as a lingua franca in parts of the Pacific Northwest, British Columbia and Alaska. Although its use has declined substantially, Chinook Jargon has left a lasting imprint on regional place names and vocabulary. The term skookumchuck, formed from words meaning “strong” and “water,” is used for rapids and, in coastal settings, powerful tidal currents.

Kelp dominates the outer bay’s nearshore habitat, while eelgrass is more prevalent in sheltered inner waters. Rocks and shoals extend from both shores, and rocks obstruct the entrance to the lagoon, making it generally unnavigable. These nearshore habitats are vital to Prince William Sound’s coastal ecosystem, providing food, shelter, and nursery grounds for juvenile fish and supporting food webs that sustain larger predators and commercially important fisheries. Research conducted in western Prince William Sound in 2006 and 2007 documented varied fish assemblages in nearshore habitats, including eelgrass, kelp and rocky areas. These habitats support resident species and seasonal arrivals of juvenile fish. Some species are commercially important or serve as prey for larger predators. Published studies provide a baseline for understanding the bay’s fish communities, but the available evidence does not establish their present-day condition or quantify recent changes specifically at Ewan Bay. Warming waters and shifts in species distributions are potential pressures on these communities, although the scale of future changes at this site requires further monitoring. Read more here and here. Explore more of Ewan Bay and Prince William Sound here: