The Seward Depot is a former rail depot in Seward, Alaska, United States.The depot was constructed in 1917 at what is now Adams Street and Ballaine Boulevard to serve the railroad line. Seward was and remains the southern terminus of the Alaska Railroad. The Seward line was owned by the Alaska Central Railroad, the Alaska Northern Railroad, and at the time of the depot's construction, the U.S. government. President Warren G.