Treasure Island (Yerba Buena Island)
Treasure Island and Yerba Buena Island, once separate landmasses, now form a single artificial island complex in the San Francisco Bay, offering a unique blend of historical significance, ongoing development, and recreational opportunities. Originally constructed for the 1939 Golden Gate International Exposition, Treasure Island has undergone numerous transformations and continues to evolve as a key part of the city of San Francisco. The islands’ combined area presents a substantial land resource within the bay, attracting attention for residential, commercial, and public use projects.
History
The story of Treasure Island begins not with its construction, but with the natural landscape of the bay. Yerba Buena Island, the older of the two, was originally a natural island inhabited by the Ohlone people for centuries. It served as a landmark and strategic location for early explorers and settlers. In 1846, it became the site of the U.S. Navy’s first West Coast naval base, Yerba Buena Naval Station, playing a crucial role in the Mexican-American War and subsequent naval operations. The island’s strategic importance continued through the 20th century, with the naval station expanding and evolving to meet changing military needs.
The creation of Treasure Island itself was a monumental engineering feat undertaken in the 1930s. To host the 1939 Golden Gate International Exposition, a 390-acre artificial island was constructed from dredged sand from the bay floor and rock quarried from Alcatraz Island and the East Bay hills. The project, completed in just under three years, involved the creation of a massive earthen dam and the innovative use of hydraulic fill. Following the exposition, the island was taken over by the Navy and became Naval Station Treasure Island, functioning as a vital military facility during World War II and the Cold War. The Navy officially closed the station in 1997, initiating a complex and lengthy process of environmental remediation and redevelopment [1].
Geography
Treasure Island and Yerba Buena Island are connected by a causeway, effectively forming a single landmass. Yerba Buena Island, approximately 33 acres in size, is the more naturally formed of the two, with rolling hills and established vegetation. It offers panoramic views of the San Francisco skyline, the Bay Bridge, and the surrounding bay waters. Treasure Island, significantly larger at approximately 390 acres, is comparatively flat, a consequence of its artificial construction. The topography of Treasure Island is continually being reshaped through ongoing development projects.
The islands’ location within the San Francisco Bay exposes them to unique geographical challenges, including seismic activity and potential sea-level rise. The artificial nature of Treasure Island necessitates ongoing monitoring and maintenance to ensure its structural integrity. Environmental concerns related to the island’s past use as a naval base, including potential soil and water contamination, have been a major focus of remediation efforts. The islands are surrounded by deep water channels, facilitating maritime traffic and providing access for ferries and other vessels [2].
Economy
For decades, the economy of Treasure Island was almost entirely dependent on the presence of the U.S. Navy. The closure of Naval Station Treasure Island in 1997 triggered a significant economic shift, necessitating a comprehensive redevelopment plan. The Treasure Island Job Corps Center continues to operate on the island, providing vocational training and educational opportunities for young adults.
Currently, the economy of Treasure Island is undergoing a substantial transformation, driven by large-scale residential and commercial development. The Treasure Island Redevelopment Project, overseen by the City and County of San Francisco, aims to create a mixed-use community with housing, retail space, offices, and public amenities. The project is expected to generate thousands of jobs and contribute significantly to the city’s tax base. The development also focuses on attracting businesses in sectors such as technology, renewable energy, and advanced manufacturing. The islands are also becoming a hub for maritime-related industries and tourism.
Attractions
Treasure Island offers a variety of attractions, primarily focused on its scenic views and recreational opportunities. The Treasure Island Music Festival, while no longer held annually, was a prominent event that drew large crowds and boosted the local economy. The islands provide stunning vistas of the San Francisco skyline, the Golden Gate Bridge, and the Bay Bridge, making them popular destinations for photographers and sightseers.
Several parks and open spaces have been developed on Treasure Island, offering opportunities for walking, jogging, and picnicking. The Clipper Cove Marina provides berthing for boats and access to sailing and other water sports. Yerba Buena Island features historic buildings and landmarks related to its naval past, including the former naval chapel and officers’ quarters. Ongoing development projects are incorporating new public art installations and cultural spaces, further enhancing the islands’ appeal as a destination for residents and visitors [3].
Getting There
Access to Treasure Island and Yerba Buena Island is primarily via the San Francisco–Oakland Bay Bridge. Several on- and off-ramps connect the islands to the bridge, providing direct access to San Francisco and the East Bay. Public transportation options include Muni bus lines that serve Treasure Island, connecting it to other parts of the city.
Ferry service is also available, providing an alternative mode of transportation and offering scenic views of the bay. The ferry terminal on Treasure Island connects to locations in San Francisco and the East Bay. Bicycle access is encouraged, with dedicated bike lanes and paths connecting the islands to the city. Parking is available on both islands, but can be limited during peak hours and special events. The islands’ accessibility is continually being improved through transportation infrastructure upgrades and the expansion of public transit options [4].
Neighborhoods
While not formally divided into distinct neighborhoods in the traditional San Francisco sense, Treasure Island is experiencing the emergence of residential communities as development progresses. The new housing developments are creating distinct pockets of activity, with a mix of apartments, condominiums, and townhouses. These emerging communities are characterized by their modern architecture and focus on sustainable living.
Yerba Buena Island retains a more established residential character, with a mix of historic homes and newer developments. The island’s smaller size and hilly terrain contribute to a more intimate and secluded atmosphere. Both islands are designed to foster a sense of community through the creation of public spaces, parks, and community centers. As the redevelopment project continues, the islands are expected to evolve into a vibrant and diverse urban environment.