The San Francisco County Transportation Authority (Transportation Authority) is working jointly with the Treasure Island Development Authority (TIDA) and the Office of Economic and Workforce Development (OEWD) on the development of the Yerba Buena Island (YBI) I-80 Interchange Improvement Project. TIDA and OEWD asked the Transportation Authority, in its capacity as the San Francisco’s Congestion Management Agency (CMA), to lead the effort to prepare and obtain approval for all required technical documentation for the YBI I-80 Interchange Improvement Project because of our expertise in funding and interacting with the California Department of Transportation (Caltrans) on technical aspects of the project.
This project is independent of but closely coordinated with the Caltrans San Francisco Oakland Bay Bridge (SFOBB) projects and the TIDA Treasure Island Redevelopment project. The project is funded with Federal Highway Bridge Program (HBP), Proposition 1B Local Bridge Seismic Retrofit Account (LBSRA) and TIDA local match funds.
The scope of the YBI I-80 Interchange Improvement Project includes two major components:
- On the east side of the island, the I-80/YBI Ramps project will construct new westbound on and off ramps to the new Eastern Span of the Bay Bridge.
- On the west side of the island, the YBI West-Side Bridges Retrofit project will seismically retrofit the existing bridge structures—critical components of island traffic circulation between the islands and the Bay Bridge.
YBI I-80 East Side Ramps
The YBI I-80 East Side Ramps project will relocate the westbound exit ramp to the north side of I-80 and reconstruct the westbound entrance ramp on the north side of I-80 onto the SFOBB. The project will improve traffic safety, geometric design, and traffic operations of the ramps. Total estimated project cost is $95.67M.
A joint CEQA/NEPA document prepared by the Transportation Authority and Caltrans in the form of a Final Environmental Impact Report/Environmental Impact Statement (FEIS/FEIR) was completed for the project in December 2011. The FEIS/FEIR was re-validated in June 2012 to account for additional temporary improvements required by the US Coast Guard.
All required Plans, Specifications and Estimates (PS&E), Right of Way (R/W) and Construction phase permits and agreements were completed in March 2013, and a construction funding allocation of $77.5 million was approved in July 2013.
The Transportation Authority is responsible for construction contract administration efforts, and therefore retained a construction management inspection consultant firm in July 2013, subsequently awarding the construction contract in December 2013. Construction commenced in January 2014 with completion targeted for mid-2016.
YBI WEST-SIDE BRIDGES RETROFIT
The YBI West-Side Bridges Retrofit project will retrofit eight existing bridge structures along Treasure Island Road to meet current seismic safety standards. Five of the structures will be seismically retrofitted, while three will be demolished and replaced. Total estimated project cost is $46.39M.
Seismic Strategy Reports prepared by the Transportation Authority were approved in October 2011. A joint CEQA/NEPA document prepared by the Transportation Authority and Caltrans in the form of a Categorical Exemption/Categorical Exclusion was completed in December 2012.
Detailed design and right of way certification efforts have begun and completed to 35% in 2013. Final design and right-of-way certifications are expected to be complete by in early 2015. Construction of these improvements will be coordinated with completion of the I-80/YBI Ramps and SFOBB construction efforts. The project is currently anticipated to start construction in mid-2016 with completion targeted by late 2018.