To facilitate an efficient and cost-effective building program, the East Span Project has been divided into eleven separate construction contracts. In addition, Caltrans will pursue a separate contract to remove the existing bridge.

A summary of each contract is listed below:

view larger project components schematic

Geofill Contract
(January 2002 - March 2003)

The purpose of this contract is to stabilize the underlying soil at the Oakland Touchdown by applying surcharge (dirt fill) to remove water and cause settlement. When settlement has reached an acceptable rate, the Oakland Touchdown will be ready to support the new westbound approach and the relocated Caltrans maintenance road.

Oakland Approach Structure Contracts
(Westbound Start Anticipated Summer 2007, Eastbound Start Anticipated Early 2011)

These two contracts (westbound and eastbound) will construct the roadway structure on the Oakland Touchdown.

Skyway Contract
(February 2002 - Spring 2007)

The Skyway Contract involves construction of the bridge component that will connect to the Oakland approach structures on the eastern shore and to the Self-Anchored Suspension portion on the west side. This component of the East Span Project is the longest portion. It will consist of two adjacent structures that stretch over a mile in length.

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The Self-Anchored Suspension portion of the new bridge includes the following three contracts:

 

Self-Anchored Suspension Bridge Land Foundation [Pier W2] Contract
(June 2003 - October 2004)

This contract constructs the westernmost foundations and columns of the self-anchored suspension bridge at Pier W2 not far from the existing Pier E1 on YBI. The steel-framed anchorages within the footings are included in this work, but the cables running between the footings and the superstructure are excluded.

Self-Anchored Suspension Bridge Marine Foundations [Piers T1 and E2] Contract
(April 2004 - Estimated Completion Spring 2008)

This contract constructs the tower foundation at Pier T1 and the easternmost foundations and columns of the self-anchored suspension bridge at Pier E2. The work is in and on the waters of the Bay just to the east of YBI and to the north of the existing bridge.

Self-Anchored Suspension Bridge Superstructure [box, tower, and cables] Contract
(Start Anticipated Summer 2006)

This contract supplies and erects the superstructure of the self-anchored suspension bridge; the box, the tower and the cables. The construction will take place on the eastern side of YBI.

Yerba Buena Island Electrical Substation and Simple Retrofit of the YBI Viaduct Near the Tunnel Contract
(June 2003 – May 2005)

This contract will construct a new electrical substation on YBI meeting modern standards and then remove the existing substation and adjacent maintenance support building. The new substation will be east of the tunnel and north of the existing bridge.

Yerba Buena Island Demolition Contract
(January 2003)

This work removes unwanted US Coast Guard (USCG) and Caltrans buildings from YBI. The USCG buildings to be removed are building numbers 30, 40 and 270 (USCG Building 75 will not be removed in this contract). Caltrans Building 277 will also be removed.

Yerba Buena Island Structures Contract
(Start Anticipated Summer 2008)

This work modifies portions of the existing YBI double-decked concrete viaduct and constructs the permanent structures on YBI that transition traffic between the double-deck YBI tunnel and the side-by-side traveled way on the self-anchored suspention structure.

U.S. Coast Guard Road Relocation Contract
(August 2003 - May 2004)

This contract will relocate the existing access road and gate to the U.S. Coast Guard facility to the south to allow for temporary detour construction.

South - South Detour Contract
(July 2004 - Summer 2007)

This contract designs and constructs temporary detour structures, transfers traffic onto the detour structures, and removes the majority of the existing YBI double-deck structures.