John O'Connell Bridge, Sitka

The John O'Connell Bridge stands as a vital infrastructure connecting the town of Sitka on Baranof Island to the airport and Coast Guard Station on Japonski Island. Before its completion in 1971, commuters relied on a ferry service to traverse the Sitka Channel, making transportation between the two islands more time-consuming. Named in honor of John W. O'Connell, a former mayor of Sitka, the bridge spans a total length of 1,255 feet (383 m), featuring a main span of 450 feet (140 m). Notably, it holds the distinction of being the United States' first vehicular cable-stayed girder spanned bridge.

Characterized by its innovative design, the John O'Connell Bridge boasts four 100-foot-high (30 m) steel pylons that support two three-cable sets, each carrying a section of the bridge deck. The engineering marvel of the bridge extends beyond its functional purpose, as special attention was given to its aesthetics, particularly due to its proximity to the historic Castle Hill. The completion of the bridge significantly improved accessibility between the islands, facilitating smoother transportation for residents and visitors alike.

Today, the bridge serves as a vital link in Sitka's transportation network, with approximately 4,000 vehicles crossing it daily, marking a substantial increase from the previous reliance on shore boat passengers before its construction. Additionally, its designation as an Alaska Historic Civil Engineering Landmark by the American Society of Civil Engineers in 2022 underscores its significance in the region's engineering history.