1. SFOBB East Span Seismic Safety Project San Francisco-Oakland Bay Bridge East Span Seismic Safety Project March 12, 2002 Contractor Outreach

2. SFOBB East Span Seismic Safety Project Project Limits Project Introduction

3. SFOBB East Span Seismic Safety Project YBI TRANSITION SUSPENSION SKYWAY OAKLAND APPROACH SKYWAY SUSPENSION YBI TRANSITION OAKLAND APPROACH OAKLAND GEOFILL Existing Bridge Contract Limits

4. SFOBB East Span Seismic Safety Project Project Introduction Bridge Cross Section

5. SFOBB East Span Seismic Safety Project Replacement - Computer simulation Alternatives Photo simulation of the Replacement Alternative N-6 as viewed from Yerba Buena Island

6. SFOBB East Span Seismic Safety Project YBI Eastbound On-Ramp

7. SFOBB East Span Seismic Safety Project Yerba Buena Island  Heavy topography -- 60 meter elevation change  Steep slopes  Narrow winding roads  USCG base for 24 hour Search and Rescue unit  Lots of underground utilities

8. SFOBB East Span Seismic Safety Project Contractor Access on YBI Potential Barge Mooring Areas USCG Search and Rescue Base Vehicular Access USCG Access

9. SFOBB East Span Seismic Safety Project Environmental Constraints on YBI USCG Facilities Historic Structures

10. SFOBB East Span Seismic Safety Project YBI Special Aquatic Sites

11. SFOBB East Span Seismic Safety Project EELGRASS

12. SFOBB East Span Seismic Safety Project Construction Issues STAGE 1  Construct new Bridge  Construct eastbound (EB) and westbound (WB) detours Construction Staging Replacement Alternative

13. SFOBB East Span Seismic Safety Project Construction Issues STAGE 2  Shift traffic on to detours at Oakland TD  Construct new WB approach at Oakland TD  Complete construction of detours at YBI Construction Staging Replacement Alternative

14. SFOBB East Span Seismic Safety Project Viaduct Modifications: Retrofit existing YBI viaduct Widen existing viaduct for westbound detour Construct temporary portal frame Remove columns YBI Viaduct Modifications To Oakland To San Francisco

15. SFOBB East Span Seismic Safety Project Remove existing Caltrans electrical substation and garage Electrical Substation WB On-ramp to SF

16. SFOBB East Span Seismic Safety Project Reroute WB Traffic Plan WB detour Typical Section Route WB traffic to WB detour Existing Bridge EB Detour WB EB (lower deck) Plan WB detour Existing Bridge EB Detour

17. SFOBB East Span Seismic Safety Project EB WB WB Traffic is on new Skyway, new SAS, and WB detour. EB Traffic is still on existing bridge (lower deck). Traffic

18. SFOBB East Span Seismic Safety Project Portal Frame and Seat Extension Plan WB detour EB Detour Construct seat extension at south side … and construct portal frame Existing Bridge Typical Section

19. SFOBB East Span Seismic Safety Project Load Transferred to Portal Frame Plan WB detour EB Detour Typical Section Portal frame: Supports upper deck Creates opening for EB detour operation Existing Bridge WB EB

20. SFOBB East Span Seismic Safety Project Eastbound Detour (7) Route EB Traffic to EB Detour Existing Bridge To San Francisco To Oakland Eastbound Detour

21. SFOBB East Span Seismic Safety Project Construction Issues STAGE 3  Shift traffic to new WB bridge and detours at YBI  Construct EB landing at Oakland TD  Remove existing bridge from Bent 48 to YB1 Construction Staging Replacement Alternative

22. SFOBB East Span Seismic Safety Project Construction Issues Construction Staging Replacement Alternative STAGE 4  Construct remaining section of the new bridge at YBI  Shift all traffic to new bridge

23. SFOBB East Span Seismic Safety Project Construction Issues Construction Staging Replacement Alternative STAGE 5  Dismantle existing bridge

24. SFOBB East Span Seismic Safety Project Yerba Buena Island Traffic Impacts Westbound on-ramp (east side of island) Westbound on-ramp (east side of island)

25. SFOBB East Span Seismic Safety Project Yerba Buena Island Traffic Impacts Eastbound off-ramp (east side of island) Eastbound off-ramp (east side of island)

26. SFOBB East Span Seismic Safety Project Yerba Buena Island Traffic Impacts Southgate Road Southgate Road

27. SFOBB East Span Seismic Safety Project Cut columns to transfer load to portal frame Number of Closures Activity Requiring EB and WB Full Bridge Closures 4 Hours per Closure 6 Closure Alternatives 2 8 Simultaneous Eastbound and Westbound Full Bridge Closures

28. SFOBB East Span Seismic Safety Project Activity Requiring EB Only Full Bridge Closures 6 23 Remove 96 upper deck concrete panels 8 13 Remove 48 stringers and 9 floor beams Remove side trusses and replace steel curbs with temporary “K” rails 12 11 Closure Alternatives Number of Closures Hours per Closure Eastbound Only Full Bridge Closures

29. SFOBB East Span Seismic Safety Project Utilities Westbound Eastbound 6 NPS Reclaimed Water 10 NPS Sanitary Sewer with 18 NPS Casing 12 NPS Water NOT TO SCALE CT Air and Water

30. SFOBB East Span Seismic Safety Project FLOOR BEAM SECTION INSTALLATION OF UTILITIES INSIDE MAIN SPAN E LINE UTILITY TRAYS TRAVELER BIKE PATH

31. SFOBB East Span Seismic Safety Project YBI SUBSTATION MACALLA ROAD USCG ROAD W LINE E LINE UTILITY TRENCH PIER W2 PROPOSED UTILITY RELOCATIONS ON YBI

32. SFOBB East Span Seismic Safety Project ELEVATION CONCRETE DUCT BANK ANCHORS SECTION A-A SECTION B-B SECTION C-C ELEVATION SLOPE STABILIZATION UTILITY DUCT INSTALLATION DETAILS 1.500 0.300 0.800

33. SFOBB East Span Seismic Safety Project PLAN AT GRADE PLAN AT BOTTOM DECK SECTION A-A MAIN SPAN DETAILS OF CONDUIT RISER UP TO W2 WB TRAYS CONDUITS ROUTING OF UTILITY DETAILS AT PIER W2 W2 C.L. PIER W2 UTILITY TRAYS TRAVELER RETAINING WALL

34. SFOBB East Span Seismic Safety Project Covers domestic transportation of merchandise Requires floating cranes to be domestically built, owned, and operated Foreign floating cranes can be used as long as they do not “transport” merchandise JONES ACT INFORMATION