San Francisco-Oakland Bay Bridge East Span Seismic Safety Project
Contractor’s Information Session
Friday, November 10, 2000 – 9 a.m. to 3:30 p.m.
Caltrans District 4 Auditorium, 1st Floor
111 Grand Avenue, Oakland, CA
The California Department of Transportation (Caltrans) conducted the Contractor's Information Session for contractors, fabricators, and suppliers to provide information about the San Francisco-Oakland Bay Bridge East Span Seismic Safety Project area and the construction methodology. The project will be divided into multiple contracts. Separate bid packages will be issued for each contract. The information session focused on the Skyway contract, which is targeted to be advertised in early 2001.
Approximately 170 contractors, fabricators, and suppliers attended the information session. In general, all the participants expressed appreciation for the conference and the information they received. Information books, which contained the presented information, were distributed to all attendees.
Approximately 800 contractors, fabricators and suppliers were informed of the conference location, date and time via mail. A display ad was placed in Engineering News Record about one month prior to the conference.
A PowerPoint presentation was conducted that included information on civil engineering and environmental details, geology, overview of structures, details on the Skyway contract, and project specifications. The audience participated in a comment/question and answer session following the presentation.
AUDIENCE COMMENTS / QUESTIONS (Q) AND ANSWERS (A)
1. Several of those present at the Contractor's Information Session requested a list of the attendees.
A list of the Contractor's Information Session attendees will be posted on Caltrans' Web site at www.dot.ca.gov/hq/esc/tollbridge/.
2. A contractor stated that an organizational chart showing how Caltrans is structuring the project, along with a list of key decision makers, and the information session presenters would be helpful. Also, contact information for future Contractor's Information Sessions.
A list of the presenters will be provided along with a summary of the meeting at www.dot.ca.gov/hq/esc/tollbridge/. Contact information for future information sessions will also be provided at the site. The contracts for the East Span project will be structured as a normal Caltrans' contract with the resident engineer being the link and decision-maker between Caltrans and the contractors.
3. Several conference attendees requested a list of steel fabricators.
Caltrans will provide a list of the information session attendees, but it will be up to contractors to locate specific steel fabricators.
4. A contractor asked to be directed to individuals who deal with protective materials for concrete and steel.
It will be up to contractors and suppliers to locate individuals that deal with protective materials for concrete and steel. Caltrans will provide a list of the contractors, fabricators, and suppliers that participated in the information session.
5. Q: Can we get a CD version of the PowerPoint presentation that was conducted at the information session?
A: The PowerPoint presentation will be posted on Caltrans' Web site at www.dot.ca.gov/hq/esc/tollbridge/. The presentation is for information purposes only. Details of the construction may change before the actual contract comes out, so for bidding purposes contractors should look at the official bidding document that is targeted to be released in January 2001.
6. Q: What is the approximate advertised bid date for the Skyway?
A: The Skyway is targeted to be advertised in January 2001.
7. Q: If the Skyway is put out to bid in the first quarter of 2001, when would the contract be awarded and when would the Skyway construction begin?
A: The bid is targeted to open twelve to sixteen weeks after it is advertised. There would be another three to six months after the bid open before construction would begin. The first work anticipated would be the dredging of the access channel. The first work actually done will be up to the contractor who builds the project.
8. Q: Will the Skyway construction schedule be available for contractors?
A: Caltrans will provide a general number of working days for contractors to base their bids. The contract will be A + B. Each contractor will be responsible for creating a detailed construction schedule. However, Caltrans' will identify the construction sequences and milestones that are mandatory for the project. There are milestones and sequences to be respected, such as certain elements of the Skyway that are required to facilitate connections to the Self Anchored Suspension bridge. Contractors should look at the specifications to identify the schedule criteria that are required and those that are flexible.
9. Q: Is a mandatory construction sequence for the erection of the Superstructure provided, or will it be left up to the contractor?
A: The contractor will have to develop the construction schedule. Caltrans has developed some construction criteria that are mandatory. Contractors should look at the specifications and plans to identify the schedule criteria that are required. There are milestones and sequences to be respected.
10. Q: When will the calendar restrictions for on-water work be determined? Are there any working hour or working day restrictions?
A: Caltrans' will know the on-water restrictions once the environmental permits are obtained. These permits are targeted to be available sometime in early 2001. Caltrans' will pass that information on to contractors during the advertisement period so that the contractors can finalize their construction schedules and costs.
11. Q: Will you allow alternate segment layouts for the Superstructure?
A: The architecture, seismic safety, schedule, and cost should be considered when submitting alternate layouts or Cost Reduction Incentive Programs (CRIPS). The CRIP would have to be reviewed by the seismic safety PEER review board. The contractor would be required to follow the guidelines and schedule to get the CRIP through for Caltrans' approval as well as other external approvals.
12. Q: Is cast in place an alternative for Superstructure erection?
A: Cast in place is not an alternative for Superstructure erection at this time. Caltrans will entertain opportunities to save money on this project. Procedures for presenting CRIPs are listed in the contractor's packets that were distributed at the information session. CRIPs should maintain or improve the architecture, seismic safety, maintenance, cost, and schedule for the project.
13. Q: Will Caltrans allow modifications to the internal configuration of the Superstucture cross-sections?
A: Modifications to internal configuration would require the submittal of a CRIP. The CRIP would have to be reviewed by the seismic safety review board. The guidelines for submitting CRIPs have been specified in the contractor's package that was distributed at the information session.
14. Q: Will the State provide the coating inspection for the bridge?
A: Caltrans will provide as much coating inspection as possible. If Caltrans feels that they do not have adequate staff to provide the coating inspection, the work will be contracted out.
15. Q: Due to the magnitude of the precast operation, will Caltrans consider bid items for precast yard mobilization?
A: Precast yard mobilization is not being considered as a bid item at this time.
16. Q: Will the use of high performance concrete be considered?
A: The design team considered different materials during the design phase of the project. Maintenance, the property of concrete, and other things have been considered. It was determined that high performance concrete will not be used for construction of the East Span.
17. Q: In what area will high performance steel be used on the Skyway contract.
A: The use of high performance steel was evaluated and Caltrans decided not to use it for the Skyway. HDS Steel will be used for Skyway hinge pipe beam construction.
18. Q: Will broom surface or longitudinal tinning be used for the Skyway deck to insure a safe, smooth, and quiet ride?
A: Longitudinal tinning will be required for the Skyway deck to provide a safe, smooth, and quiet ride.
19. Q: Will criteria for limiting stresses under wind, seismic, and erection loads be specified for construction?
A: The design criteria will be provided in the specifications. There will be criteria for erection loads.
20. Q: Will the project include a Cost Reduction Incentive Program, and if so, for which elements?
A: Cost reduction incentive programs will be considered a CRIP if it deviates from the East Span project's specifications. The details will be specified in the special provisions.
21. Q: Will Caltrans consider alternative connection details during construction to minimize field welding?
A: The project specifications have been designed to minimize field welding. In areas where field welding is specified in the plans, details for improved constructability have been provided. Contractors would be required to submit a CRIP if they are considering modification to the specifications for field welding.
22. Q: Does Caltrans UT Certification apply to field only or both field and shop welds?
A: UT Certification will apply to both field and shop welds.
23. Q: How long did the weld up of the pile installation demonstration project take.
A: A report on the pile installation demonstration project will be put out before the advertisement of the Skyway. The report will include information regarding the duration of the pile installation demonstration project.
24. Q: Is the temporary support system for the dewatering of pile caps a contractor designed item?
A: The dewatering of pile caps is a contractor's item.
25. Q: What portion or quality of bar reinforcing is epoxy coated on each structure?
A: That information is provided in the back of the contractor's information package that was distributed at the meeting.
26. Q: To what extent will Caltrans review construction procedures and specialized equipment design?
A: Numerous working drawing submittals and full details for design will have to be provided to Caltrans for the review of specialized equipment.
27. Q: To what extent will Caltrans review the contractor's analysis of the structure during construction?
A: There are numerous requirements for submittals for various elements of the structure. Caltrans will thoroughly check to make sure that the submittals meet the requirements.
28. Q: Does Caltrans intend to assume responsibility for any differing geotechnical conditions encountered that may require time or monetary adjustments to the bid contract?
A: Caltrans will characterize and evaluate the site with respect to geotechnical issues prior to the bid. Caltrans will not hold the contractor responsible for the quality of the characterization of the site. The guidelines for geotechnical specifications will be provided in the bid documents. This contract requires only specified tip and not bearing.
29. Q: Will cast in place with form traveler be allowed? Would this be a CRIP?
A: Yes, cast in place with form traveler would require the contractor to follow the procedures for submitting a CRIP.
30. Q: Does Caltrans have a specification for cable grouting for the segmental bridge portion? Is there a cable group specification?
A: Yes, this will be included in the special provisions for the contract.