The new east bay bridge will replace the eastern span of the San Francisco Oakland Bay Bridge (SFOBB). The proposed replacement bridge is either a single-tower cable-stay or single-tower, self-anchored suspension span over the navigational channel adjacent to the Yerba Buena Island (YBI) and dominated by a skyway for the remainder of the bridge for either option. The skyway will constitute 86% in either of the cable span options. The new span will have to abide by the following design guidelines:
- bridge should be built along the northern alignment adjacent to the existing span
- two parallel decks on the skyway section and two parallel or a single deck on the cable-supported span
- bridge should have 10 traffic lanes, five in each direction, with two standard 10-foot shoulders in each direction
- carpool / bus lane is not required but accommodation for future rail service must be considered
- bridge cable or suspension towers should be no taller than towers on the western span
- the bridge should integrate into the site and surrounding environment, harmonizing with western span and landing gracefully on the Oakland shore and Yerba Buena Island.
- Visual impact of the bridge is important, girders, piers and rails should be designed to provide for viewing the surrounding environment as well as the new span and meet all seismic and safety standards. Night lighting is an important consideration.
- the profile of the new span must rise in elevation from the Oakland shore to the funnel at Yerba Buena Island and yet maintain a wide elevated section to accommodate maritime traffic.
The potential impact of the new span on various issues being investigated are: water of the United States, land use, endangered species, community impact, air quality, pedestrian and nonmotorized uses, noise, traffic and circulation access, water quality, hazardous materials, floodplain. energy, archaeology, geology, visual and historic resources. Caltran is preparing a Draft Environmental Impact Statement pursuant to NEPA for the East Span Project. FHWA is the lead agency.
COAST GUARD ISSUES
Section 9 of the Rivers and Harbors Act permit.
License for the State to access YBI to conduct investigative studies.
License for State's contractor to access to YBI for construction.
Possible demolition of selected Coast Guard buildings (with concurrence of the Coast Guard).
Changes in navigation clearance already approved by the Coast Guard are as follows:
a) Vertical: reduced 169 feet above Mean High Water to 138 feet above MHW
b) Horizontal: reduce from 1330 feet to 500 feet between fenders
- Coordination for all construction related activities with Coast Guard.