CONTRACTOR'S INQUIRY RESPONSES

 

October 27, 1999

 

CONTRACT NO. 04-045014

 

San Mateo-Hayward Bridge Trestle Widening

 

SITE VISIT ANNOUNCEMENT: Due to demand, site visits will be held on Thursday September 2, 1999, Thursday September 9, 1999 and Thursday September 23, 1999. Reservations are required and can be made by emailing Duty_Senior_Tollbridge_District04@dot.ca.gov. Please include firm name, number of persons, phone number, and contact person. Attendance is limited and reservations are made on a first come first serve basis.

Scheduled Prospective Bidders for the Site Visit on September 02, 1999

Prospective Bidders

Number of Spaces Reserved

Kiewit Pacific Co.

6

Scheduled Prospective Bidders for the Site Visit on September 09 1999

Company Name

Number of Persons

Phone Number

Contact Person

Ballast Nedam Construction Co.

2

305-578-6617

Mrs. I. Amaro

MCM Construction, Inc.

4

916-334-1221

Kevin Abbott

Traylor Pacific

1

949-475-0444

Dan Collins

GLF Construction Co

1

305-371-5228

Pierre M. Siou

Scheduled Prospective Bidders for the Site Visit on September 23 1999

Company Name

Number of Persons

Phone Number

Contact Person

FCI Constructors

3

408-227-2735 Ext. 102

Tommy Evans

Reservations can be made for the site visit on September 23, 1999 at this time and no reservation will be accepted after 3:00 p.m. September 21,1999. Reservations also can be made for the site visit on September 30, 1999 at this time and no reservation will be accepted after 3:00 p.m. September 28,1999. If the Toll Bridge Program Duty Senior does not receive any request for the September 30 site visit by Tuesday September 28, 1999, then the site visit for September 30, 1999 will be cancelled.

NOTES:

(1) PLEASE NOTE THAT ALL PERSONS MUST SIGN THIS FORM. BEFORE HE OR SHE MAY ACTUALLY GO ON THE SITE VISIT.

(2) Private vehicles will not be allowed on this site visit. Prospective bidders must take the shuttle bus to the various bridge locations.

(3) REQUIRED SAFETY GEAR (FOR THIS SITE VISIT):

Fall protection equipment - full body harness, 2 lanyards with large snaps (ladder hooks)

Safety vests

Hard hat with chin strap

Leather gloves

Flashlights

Coveralls

Work boots

Safety glasses

Ear protection

TRESTLE WIDENING SITE VISIT - THURSDAY SEPTEMBER 2, 9, 23 and 30, 1999

SITE VISIT ITINERARY

7:45 a.m.:

Meet at 111 Grand Avenue, Oakland, California 94623 (outside lobby).

8:00 a.m.:

Board Caltrans shuttle bus.
Leave 111 Grand Avenue.

8:40 a.m.:

Arrive at the East Approach to the Bridge.
Tour the following locations:

(1)

Walk along the east end Approach to tour the vicinity of the "END CONSTRUCTION," for the Contract. Observe the right hand view of the westbound lanes of the bridge.

(2)

Stop at the neighborhood of Pier No. 38, and tour the vicinity of the "BEGIN CONSTRUCTION," for the Contract. Observe the right hand side of West Bound lanes from the "Begin Work," side of the Contract.

(3)

Drive to the West End of the Bridge, turn around and drive eastbound to the vicinity of the end of high rise portion of the Bridge. Make observations over and under the deck.

(4)

Drive back over the Bridge, if requested stop at the pullouts.

10:30 p.m.:

Return to 111 Grand Avenue.

11:00 p m:

End of the Site Visit.

The responses to contractors' inquiries, unless incorporated into a formal addenda to the contract are not a part of the contract and are provided for the contractor's convenience only. In some instances, the question and answer may represent a summary of the matters discussed rather than a word-for word recitation. The responses may be considered along with all other information furnished to prospective bidders for the purpose of bidding on the project. The availability or use of information provided in the responses to contractors' inquiries is not to be construed in any way as a waiver of the provisions of section 2-1.03 of the Standard Specifications or any other provision of the contract, the plans, Standard Specifications or Special Provisions, nor to excuse the contractor from full compliance with those contract requirements. Bidders are cautioned that subsequent responses or contract addenda may affect or vary a response previously given, and any such subsequent response or addenda should be taken into consideration when submitting a bid for the project.

CALTRANS TOLL BRIDGE RETROFIT PROGRAM ADDRESS

The Caltrans District 4 Office is located at 111 Grand Avenue, Oakland, CA 94612. The mailing address is P.O. Box 23660, Oakland, CA 94623-0660. The Toll Bridge Program Duty Senior telephone number is (510) 286-5549, the email address for Contractor's inquiries is Duty_Senior_Tollbridge_District04@dot.ca.gov, and the fax number is (510) 286-4563. All inquiries must include the contract number.

1. I am not able to make contact with anyone at the Plans and Bid Documents 916-654-4490. I would like to obtain a copy of the Permits and Licenses obtained by Caltrans from the US Coast Guard and the San Francisco Bay Conservation and Development Commission (BCDC) as referenced in the Specs 5-1.32. Would be able to e-mail or fax me a copy of these permits.

Copies of these permits can be obtained at the Department of Transportation, Plans and Bid Documents, Room 0200, Transportation Building, 1120 N Street, P.O. Box 942874, Sacramento, California 94274-0001, Telephone No. (916)654-4490, or may be seen at Toll Bridge Program Duty Senior’s Desk, 111 Grand Avenue, Oakland, California 94612-3717. As a courtesy A copy of BCDC Permit and USCG Permit may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet, or by presenting receipts of $3.90 and $0.90 from District 4, Cashier's Office respectively to the Duty Senior for a copy of each complete document. Please call the Toll Bridge Program Duty Senior, Telephone No. (510)286-5549, to reserve copies at least 24 hours in advance.

2. Please reserve 4 spaces for the September 9, 1999 site tour of the San Mateo Bridge Widening.

Done.

3. Please reserve a place for one representative from xxxxxxxx xxxxxx on the September 9 site visit. Will the itinerary be the same as the one posted for the September 2 site visit?

Done. The itinerary for all site visits will be the same.

4. Please be informed that undersigned like to make reservations for the site visit on 09-09-1999.

Done.

5. We would like to make a reservation to attend the site visit on September 9, 1999.

Done.

6. As discussed with you yesterday we would like to change our requested site visit date for the San Mateo Bridge Widening to Wednesday (9/1/99). Please confirm.

The dates available for site visits have been posted.

7. Where can I get a copy of the U.S. Coast Guard Checklist referenced in Section 5-1.15?

Copies of the Checklist may be obtained at the Department of Transportation, Plans and Bid Documents, Room 0200, Transportation Building, 1120 N Street, P.O. Box 942874, Sacramento, California 94274-0001, Telephone No. (916) 654-4490, and are available for inspection at the Toll Bridge Program Duty Senior at District 04 Office, 111 Grand Avenue, Oakland, California 94612, telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. As a courtesy to the bidders for project a copy of the U.S. Coast Guard checklist for San Mateo-Hayward Bridge Trestle Widening Project may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet. Presenting a receipt of $0.40 from District 4, Cashier's Office to the Toll Bridge Duty Senior may pick up the document. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

8. Where can I get a copy of the "Materials Information Handouts" as referenced in Section 5-1.24?

Caltrans provides all bidders a copy of the "Material Information Handouts." Non-bidder plan holders can request a copy of the "Material Information Handouts," by calling (916) 654-4490. If a person does not answer, please follow the directions to leave a message. A Caltrans representative will call you back. The same information is available for inspection and review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612. Please call (510) 286-5549 to make an appointment.

9. I would like to have a copy of the CSWPPP. Are they available?

Yes, they are available. Copies of the CSWPPP are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, and telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. As a courtesy to the bidders for the project, a copy of the CSWPPP for San Mateo-Hayward Bridge Trestle Widening Project may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet. By presenting a receipt of $10.00 from District 4, Cashier's Office to the Toll Bridge Duty Senior, pick up a personnel copy of the document. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

10. Where can I get a copy of the "Foundation Recommendations and the "Information Handout" referenced in Section 10-1.33?

Foundation Recommendations are included within the contents of the "Material Information Handouts." Caltrans provides all bidders a copy of the "Material Information Handouts." Non-bidder plan holders can request a copy of the "Material Information Handouts," by calling (916) 654-4490. If a person does not answer, please follow the directions to leave a message. A Caltrans representative will call you back. The same information is available for inspection and review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612. Please call (510) 286-5549 to make an appointment.

11. I have been unable to reach a live voice by way of calling 916/654-4490 and am hoping you can help me.

Morrison Knudsen is interested in bidding on the San Mateo Bridge widening job, contract 04-045014. In the job's specifications, there are references to a permit, a checklist, and test results. Is there a listing that includes these items as well as other items we should obtain? If so, we would like to obtain a copy.

If not, we request a copy of the following items:

1. San Francisco Bay Conservation Development Commission (BCDC) - - permit issued by them covering work to be performed under this contract

2. U.S. Coast Guard, 12th District - - U.S. Coast Guard Checklist

3. "Sediment Sampling Analysis Report - San Mateo Hayward Trestle Widening"

Copies of BCDC permit can be obtained at the Department of Transportation, Plans and Bid Documents, Room 0200, Transportation Building, 1120 N Street, P.O. Box 942874, Sacramento, California 94274-0001, Telephone No. (916)654-4490, or may be seen at Toll Bridge Program Duty Senior’s Desk, 111 Grand Avenue, Oakland, California 94612-3717.

Copies of U.S. Coast Guard Checklist are available for review at the Toll Bridge Program Duty Senior’s Desk, 111 Grand Avenue, Oakland, California 94612-3717. As a courtesy, a copy of BCDC Permit and USCG checklist may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet, or by presenting receipts of $3.90 and $0.40 from District 4, Cashier's Office to the Duty Senior for a copy of each complete document. Please call the Toll Bridge Program Duty Senior, Telephone No. (510)286-5549, to reserve copies at least 24 hours in advance.

Copies of the "Sediment Sampling Analysis Report - San Mateo Hayward Trestle Widening," are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. As a courtesy to the bidders for the project a copy of the CSWPPP for San Mateo-Hayward Bridge Trestle Widening Project may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet. By presenting a receipt of $9.60 from District 4, Cashier's Office to the Toll Bridge Duty Senior, pick up a personnel copy of the document. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

12. My name is Brad Kaufman and I am with Kiewit Pacific Co. We are bidding the San Mateo Bridge Widening Project. I would like to arrange for a site visit to the San Mateo Bridge Widening Job. I would like to set it up for Friday 8/27/99 at 9:00am. We will have about 6 people.

The dates available for site visits have been posted. Reservations were confirmed for 9/2/1999.

13. We will be bidding on the above-referenced project (San Mateo-Hayward Bridge Widen, Contract No 04-045014) as a prime contractor in Joint Venture with another company, and both companies are pre-qualified to bid on the project. Please answer the following questions in this regard:

1.) Do we need to receive approval to bid as a Joint Venture?

2.) Does the Bid Bond need to be issued in the name of the Joint Venture?

Another question: page 89 of Notice to Contractor, Paragraph 10-1.14 - Transportation for Engineer - indicates insurance requirements as $50,000,000. Is this amount correct?

No, you don’t need to receive approval to bid as a Joint Venture.

Yes, it should be. Because the name of the Joint Venture is the entity that Caltrans is dealing with.

Yes, it is.

14. Can we have copies of these reports sent by Fed Ex Acct.: xxxxxxxx-x to us?

1.) The complete report entitled "Sediment Sampling and Analysis Report - San Mateo-Hayward Trestle Widening Report."

2.) The Conceptual Storm Water Pollution Prevention Plan, hereafter referred to as the "CSWPPP."

Also, are there any x-sections available?

Copies of the "Sediment Sampling Analysis Report - San Mateo Hayward Trestle Widening," are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. Copies of the report may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet. By presenting a receipt of $9.60 from District 4, Cashier's Office to the Toll Bridge Duty Senior, pick up a copy of the document. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

Copies of the CSWPPP are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, and telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. Copies of the report may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet. By presenting a receipt of $10.00 from District 4, Cashier's Office to the Toll Bridge Duty Senior, pick up a copy of the document. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

Yes, cross sections are available. Copies of the cross-sections - San Mateo Hayward Trestle Widening," are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. Copies of the cross-sections may be obtained from the office of the Toll Bridge Duty Senior at 10 cents per sheet. By presenting a receipt from District 4, Cashier's Office to the Toll Bridge Duty Senior, pick up copies of the cross-sections. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

15. The following are requested.

1.) Please have as-built plans of the existing bridge available for view at the district office by September 8.

2.) Please make the cross sections available at the district office by September 8.

Copies of the as-built plans for the existing bridge are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, and telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

Copies of the cross sections are available for review at the Office of the Toll Bridge Program Duty Senior at District 04, 111 Grand Avenue, Oakland, California 94612, and telephone number (510) 286-5549, duty_senior_tollbridge_district04@dot.ca.gov. Please call the Office of the Toll Bridge Program Duty Senior, to reserve copies at least 24 hours in advance.

16. Ref. Special Provisions, Pages 1 and 9 - Notice to Contractors. At the bottom of Page 1 it is stated that "The bidder shall submit prices for all of the work of Items 1 through 79, plus prices for all of the work of the items included in the alternative selected by the bidder." The Copy of Engineers Estimate on Page 9, as well as the proposal form, shows Item 127 - Mobilization as part of Alternative 3. Shouldn't a mobilization item be included for each of the alternatives, or in the listing of items common to all alternatives?

Correct. Item 127 "Mobilization" is common to all the alternatives.

17. Four very large projects in the toll bridge system are out for bid at this time. Additionally, this bid will require extra effort and time to analyze three alternates. For these reasons we request a two-week extension of the bid date.

Bids for this contract will be opened on October 27, 1999, instead of the date of October 13, 1999.

18. Can the contractor build a pile founded temporary work trestle to access the work?

No. BCDC permit 20-98, however, allows the contractor to " Construct and use a temporary staging platform at the west end of the project just north of the proposed trestle. Approximately 6,000 square feet of pile- supported fill and 350 square feet of solid fill will be permitted. Transport barges may be used to bring materials and equipment to the project site for all three design variations."

Temporary Fill To be Removed. Approximately 350 square feet of temporary solid fill (piles) and 6,000 square feet of pile-supported fill are needed for the staging platform. If either the "Double Tee" or the "Bulb Tee" girder are chosen by the contractor, there will be an additional 600 square feet of temporary solid fill (200 - 24" diameter piles) to accommodate the 2,000-foot-long, mobile overhead railing necessary to construct these alternatives. This system may be moved along and be in place at any given time during construction.

19. Can the Contractor use two different alternatives, one for each end of the bridge?

No. See Section 10-1.01, "Alternative Construction," of the special provisions. It states that "The Contractor shall construct ... in accordance with one of the alternative designs shown on the plans....

20. Plan sheet 148 of 214, Section A-A and Section B-B. Will the Contractor be allowed to eliminate the void for the 610 mm piles, i.e., cast the pile solid?

No.

21. Bid Schedule, Item 33, Bridge Removal (Portion): Is the existing concrete barrier to be removed included for payment in this item?

Yes, the barrier removal shown on the bridge plans is included in the contract item, bridge removal (portion).

22. Are the driving logs from the first trestle available for review and if so where?

There are no pile driving records available.

23. Is the epoxy coated reinforcement in the precast members paid as part of the precast concrete member or bar reinforcing steel item?

Reinforcing steel is included in the price paid for furnishing the precast concrete member. Refer to Section 51-1.23 "Payment" of the Standard Specifications.

24. Please have pile driving records for the existing bridge available for view at the district office by September 8.

There are no pile driving records available.

25. There appears to be a terminology discrepancy, is the term "mean lower low water" and the term "mean low low water" one in the same? If not, please explain.

The terms are used interchangeably and mean the same.

26. There is load testing for this contract, will specified tips change? What type of testing will be done on the piles?

Load testing consists of static load testing, dynamic monitoring and bearing acceptance criteria. The primary purpose is to validate the design criteria. Specified tip elevations may change.

27. On sheet 212 of 347, how can the No. 19 bars be continuous as shown from the details on the plans? The precast bent caps on each side of the pile show the coupler as embedded into the cap with the bar running through the cap.

Section C-C details a #19 x 460 bar to be coupled to the hooked end.

28. Please refer to the welding specification section 49-5.01 item 5. The question is that when I refer to AWS D1.1 I cannot determine how much if any of a shop installed weld needs the NDT inspection. Would you please tell myself as well as other bidders and pipe suppliers because it has a dramatic affect on the pipe price.

Please refer to drawing sheet 259 of 347. Note 2 states that the prestressing panels shall be placed perpendicular to the girders. If that is the case, are the 1893 panels 27 meter wide and 2 meters in length and 81mm deep? If that is the case, how does a person pick the panel?

Are the driving logs from the first trestle available for review and if so where?

Has anyone sounded the ground (mudline) along the centerline of the new trestle, if so how do I get a copy of the results.

Additional provisions are described under the subsection "Steel Pipe Piling".

Attention is directed to Section 10-1.38, "Precast Prestressed Concrete Panel," of the special provisions regarding alternative panel widths.

There are no pile driving records available.

Caltrans is not aware of any sounding of the ground.

29. On page 238 of the plans, Section B-B shows a precast U bent cap with #19 ties at 150mm on center across the top of the "U". On page 239, Section B-B shows #32 bars placed below the ties. The only way to get these bars installed is to have the precaster place them before casting. Did the designer have some other method in mind? Are these #32 bars paid for as part of the precast beam instead of as Bar Reinforcement?

The method of installing the bars is determined by the Contractor.

The #32 are measured and paid for as bar reinforcing steel (bridge).

30. Special Provisions, page 123, Wave Equation. We are not clear as to the use of "bearing acceptance criteria curves"? It is our understanding that the pile tests would either confirm, or cause you to revise, the specified tip elevations shown on Drawing Sheet No. 3 of 214, titled Pile Data. We would then order piles to the appropriate length found at these specified tip elevations and drive them to these same elevations. We are unclear as to whether the use of "bearing acceptance criteria curves" would change our understanding described above. Please clarify.

"Bearing acceptance criteria curves" are for the use of the State in verifying the capacity of the driven piling. The Contractor is responsible to drive the piling to the tip elevation shown on Sheet 137 of 347 or as on the Pile Data Sheet determined as a result of the dynamic monitoring and load testing in accordance with the contract plans and specifications.

31. Section 10-1.36 - Concrete Structures - Falsework - if a temporary trestle is utilized, will the temporary piles have to be removed completely or can they be cut off at or near the mud line?

Temporary work trestle is not permitted.

32. Does a temporary work trestle fall under the 6 week review time as specified under the falsework Section 10-1.36?

Temporary work trestle is not permitted.

33. Will the Department insist that all piling placed outside of the tolerances specified in the contract be removed and replaced?

In accordance with Standard Specifications Section 5-1.09, "Removal of Rejected and Unauthorized Work," any work done beyond the lines and grades shown on the plans or established by the Engineer shall be considered unauthorized work and will not be paid for. As unauthorized work, piling placed outside of the tolerances specified in the contract shall be remedied, or removed and replaced by the Contractor in an acceptable manner and no compensation will be allowed therefore.

If the Contractor proposes to remedy the work by proposing changes to the contract to incorporate piles placed outside of specified tolerances, the Contractor, at its expense, shall submit alternate design details for the Engineer's consideration and approval. All costs and delays associated with such a proposed remedy shall be the responsibility of the Contractor.

34. On sheet 98 of 214 "Prestressed Double T Girder", the double tee depth in the chart is 813mm, whereas the detail shows 826mm. Which governs?

The correct depth is 813mm. Please see addendum #1.

35. On sheet 98 of 214 "Prestressed Double T Girder:, the x value for the c.g. of the strand is too low to work, even with 15mm strand. The lowest c.g. with 15mm strand for 3100kN is 187mm and 162mm for 2300 kN. The plans indicate an x value of 140 mm. Please advise.

Please see addendum #1.

36. Special Provisions, page 152-Clean and Paint Steel Piling. The first paragraph states the "Limits of the steel pile surfaces to be...shop primed...shall be as shown on the plans." We have been unable to locate the limits of the coating for the steel piling on the plans. Please clarify.

Please see addendum #1.

37. In this Section, the language regarding relief drilling and pile jetting, again, deviate from normal accepted industry standards. Carefully controlled jetting has been used in the industry for years to achieve prescribed pile tip elevations. Loading or locating a drill on a pile that extends above the rotary table elevation of the carrier (track grade, essentially) over water, through a range of 50 to 100 feet from center of carrier rotation, is not realistic. We suggest a re-evaluation of the jetting and allow it to be effectively used to achieve the pile tip elevation prescribed.

Please see addendum #1.

38. The concrete special provisions appear to repeat the same sections, for example Section 90-2.01 is on both pages 56 and 64, is this correct?

Please see addendum #1.

39. 10-1.44 "Limits of steel pile surfaces to be dry blasted and painted...shall be as shown on the plans." Plans show nothing.

The limits of clean and paint pile has been described in addendum #1.

40. Page 156, "After pile...final coat...at locations and limits shown on the plans." Plans show nothing.

The limits of clean and paint pile has been described in addendum #1.

41. RE: Bid items 80 and 95-Furnish 1065 mm Piling and bid items 93 and 112 epoxy coated reinforcement.

As we understand it, rebar for the precast portion of the piling is paid under bid items 80 and 95, and the rebar within the void of the precast pile is paid under bid items 93 and 112. If the alternate CISS pile is used (sheet 281) the rebar is paid under bid items 93 and 112.

This is very confusing. If the alternate CISS pile is used, bid items 80 and 95 will no longer exist and bid items 93 and 112 will increase.

Why not pay for all rebar for the piles in bid items 80 and 95?

Please see addendum #1.

Items 80 and 95 will not be eliminated. CISS and PC/PS piles are measured and paid for as the contract items furnish 1065 mm piling and drive 1065 mm pile.

The contract item for epoxy coated bar reinforcing steel is required for the cast-in-place concrete work.

42. On page 152 of the special provisions under "Clean and Paint Steel Piling," will painting of steel piling at offshore locations be allowed?

At the option of the Contractor, the final coat of waterborne inorganic zinc coating may be applied at the shop.

43. The plan sheets do not show the painting limits for steel piling. Please provide.

The upper 10 meters of steel piling shall be cleaned and painted. Please see addendum #1.

44. Bid Schedule: An item for mobilization only occurs in the series of bid items for alternative 3 (Bid Item 127). No provision has been made for mobilization in alternative 1 or 2, is the intent to use bid item 127 regardless of which alternate is being used?

Please see response to Inquiry #16 and Addendum #1.

Special Provisions, Section 10-1.38, Page 122, Installation: The specifications say the Engineer will consider jetting when "drilling through the center of piles is not feasible because the pile is so far above tip elevation", who will make the determination of whether or not drilling is feasible, and will required drilling be paid for as extra work?

Please see addendum #1.

Special Provisions, Section 10-1.38, Page 127, Load Test Piles: A minimum set period of 28 days is specified. Please confirm that the 28 days begins at the initial drive time.

A 28 day set period begins after the pile is driven to the specified tip elevation. Please see addendum #1.

45. Why is the Mobilization item #127 only in alternate 3? Where is mobilization paid for in Alternate 1 and 2?

Please see response to Inquiry #16 and Addendum #1.

Bid items #102 and #107 don't match. Should they?

Please see addendum #1.

46. Is drilling allowed for the large diameter concrete pile option?

Please see addendum #1.

47. For clarity we recommend that Mobilization-Item 127 be moved to the common items 1-79 so that a bidder not bidding alternate 3 also has a Mobilization item to bid.

Please see response to Inquiry #16 and Addendum #1.

Bid Items 84 and 99-Structural Concrete-Bridge are both fixed bid items though they contain payment for pile fill which is variable depending on the pile alternate the contractor chooses to drive. (CISS or Precast) The concrete quantity could vary 11-15%.

The concrete fill in the PC/PS option is not included in the structural concrete, bridge quantities shown in the Engineer's Estimate for Alternative 1 and 2. Please see addendum #1.

48. Special Provisions, Page 122, Installation (of piles) says, in part: "the Engineer will consider jetting...when drilling through the center of piles is not feasible because the pile is so far above the specified tip elevation."

How far above specified tip elevation would the pile have to be for this to be considered not feasible?

Please see addendum #1.

Special Provisions, Page 152, Clause 10-1.44 Clean and Paint Steel Piling, says in part: "Limits of the steel pile surfaces to be dry blast cleaned...shall be shown on the plans."
Which plan shows these limits?

The limits of clean and paint pile are not shown on the plans. Addendum #1 require: "The upper 10 meters of the steel pile shall be dry blast cleaned and shop primed with organic zinc coating."

49. What is the extent of the pile coating?

Limits of clean and paint of piles are described in addendum #1.

Is it your intention to apply the second coat after driving? This is highly unusual and very expensive.

At the option of the Contractor, the final coat of waterborne inorganic zinc coating may be applied at the shop. Please see addendum #1.

50. Section 10-1.33, (page #127) requires a 28 working day set period for the test pile to set prior to static load testing. Does the 28 working days start after the initial driving or after the last retap?

A 28 day set period begins after the pile is driven to the specified tip elevation. Please see addendum #1.

51. Where are the control areas for the pile load testing?

The control locations for Test Site Location A is from Sta 30+31 to Sta 68+60 and Test Site Location B is from Sta 68+61 to Sta 109+00. Please see addendum #1.

52. Ref: Drawing Sheets 280, 281 and 282. The elevation views of the pile on these drawings show the pile cutoff line referenced to two locations relative to the bottom of the precast bent cap. One location is 75 mm below the cap, the other location is 50 mm into the cap. The various views in other parts of the plans do not clarify this. What is your intention?

Please see the revised Section 10-1.33 "Piling," Subsection, "Installation" in addendum #1.

53. Sheet 232 of 347 shows the Double-T depths as 826 on the typical section and 813 in the table. Which is correct?

Please see revised sheet 232 of 347 in Addendum #1 for the correct depth.

54. How is one to use your "Bidders Inquiry form"? I could not find any instructions to use it on screen.

There are two versions of the Bidder Inquiry Form. There is a Microsoft Word 97 version. You can download this form and use your Word software to complete the form, and then mail or fax it to the duty senior (address and fax number are near the top of this web page).

There is also an Adobe Acrobat version of the form. If you have downloaded and installed the proper plug-in (it's free), you can complete this form on-screen by using the TAB key and/or your mouse to move around. Once completed, you can print and mail or fax the form to the duty senior. See the Adobe Website at www.adobe.com to acquire the plug-in.

Of course, you can also save your completed form as an electronic file and email it as an attachment to the duty senior.

55. Special Provisions section 5-1.14 states "no Contractor's equipment will be allowed to rest on the bottom of the bay." The States could save a substantial amount of money if the Contractor was allowed to rest on the bottom during periods of low tide.

The engineer has considered your comments and determined that there is no need for a change in the specifications for the issue in question at this time. Therefore, please bid in accordance with the plans and specifications.

56. Reference Section 10-1.14, on page 89, "The boat, boat operator and crew shall be furnished for the complete duration of the work on the days when the Contractor's work is in progress and for 8 hours each day and any additional shifts worked by the Contractor, excluding Sundays and legal holidays on the days when the Contractor's work is not in progress." Please confirm that the boat, operator and crew will not be required on a Saturday if the Contractor's work is not in progress on that day.

Please see addendum #4 for revisions to Section 10-1.14, "Transportation for the Engineer." The Engineer may request for the Contractor to furnish the boat, boat operator and crew on a Saturday when the Contractor's work is not in progress. Payment for furnishing the boat, boat operator and crew on a Saturday when the Contractor's work is not in progress will be paid for as extra work as provided in Section 4-1.03D of the Standard Specifications.

57. It is our opinion and the opinion of the marine suppliers that the boat specified for Section 10-1.14 TRANSPORTATION FOR THE ENGINEER is too small and light. It is our understanding that this was found to be the case on the San Mateo Bridge Retrofit Project currently ongoing and the specification was changed. Please check into this issue and confirm.

The engineer has reviewed your inquiry and determined that there is no need for a change in the specifications for the issue in question at this time. Please note that Section 10-1.14, "TRANSPORTATION FOR THE ENGINEER" has been revised per addendum #1.

58. In Section 3-1.01B, "Award of Contract" the third paragraph specifies that each of the two bonds (payment and performance) are required and shall be in a sum equal to 100 percent of the contract price. Does this mean that the payment bond is 100% of the contract price and the performance bond is 100% of the performance price? In Section 5-1.005 "Contract Bonds," item 3 under the second paragraph requires the payment bond be 25% of the total amount…. There appears to be a conflict.

Addendum #1, dated October 1, 1999, amended Section 5-1.005 to read: "Each of the two bonds required in Section 3-1.02, "Contract Bonds," of the Standard Specifications shall be in a sum equal to 100 percent of the contract price.

59. I recently read an article in the Sacramento Bee which mentioned that Governor Davis recently signed an Executive Order requiring pre-qualification of all contractors on public works projects. The article alluded that the Executive Order was issued to ensure the highest quality work and materials on State public works jobs. My question is how will this pre-qualification project change or alter the bid process or qualifications for the San Mateo-Hayward contract opening on October 13, 1999? Is there additional information or forms required by Cal-Trans that are different from past bid packages on the bridge jobs?

Bid it as you see it.

60. If a contractor intends to bid as a Joint Venture, can they qualify for "California Company Preference" if they obtain a Joint Venture license after bid opening but prior to award.

A Joint Venture license may be obtained after bid opening and prior to award as indicated on page 2, Notice To Contractors. However, for the purposes of award the contractor must have a Joint Venture license prior to bid opening in order to qualify for "California Company Preference".

61. Please refer to Section 10-1.02 of the special provisions, which deals with the "designated portion of the work." The pile load test at Sta. 108+88 will be within this area and may cause significant interference with the grading and paving that is to be done here. Is the pile test to be undertaken after the grading and paving, or is to be fitted into the same time slot as the rest of the "designated portion of the work?"

The pile load test operation at Station 108+88 (location "B") is not subject to the time limit specified for completion of the work in the "Designated Portion of the Work" and can be done any time at the discretion of the Contractor.

62. In as much as Caltrans will not allow barges to sit on the bottom or allow dredging to gain access, will they permit long permit loads to be on the highway at night after dark, which is the only time the contractor can shut down a lane of the bridge for deliveries. These deliveries would come from Petaluma, Pleasanton, Stockton Napa, Redding etc.

The contractor must obtain the proper permits for any oversize loads and must comply with all the requirements of the Vehicle Code. The contractor is encouraged to contact Caltrans Transportation Permit Inquiry Unit at 916-322-1297 to obtain permit load information.

63. Will the Contractor be charged working days during the Pile Test Period as outlined on pg. 129 of Specifications if this impacts the controlling item of work?

Yes.

64. We request that you consider extending the date for receiving bids on this project.

Bid opening has been delayed by Addendum #3. Bid opening date is October 27, 1999.

65. Several questions that have been asked to clarify the scope of work have not been answered (on your web page). Further, responses on the web page are prefixed with a statement to the effect that these responses are not a part of the contract until incorporated into a formal addendum. We respectfully suggest an addendum be issued answering all the questions and the bidders be given additional time to incorporate the answers into their bids.

Addendum #1, #2 and #3 have been issued.

66. Since 08/31/99 we have sent 3 requests for clarification on the above project, and have yet to receive a response for any. It would appear that there are items in the specifications that need clarification, yet no addendum has been issued to date, we are unable to verify that one might be forthcoming, and we are within 2 weeks of the bid date. With the number of alternatives that must be considered and the lead time required by the contractor to complete a rational and competitive bid, it seems unreasonable to assume the time left is sufficient. If any changes to the plans or specifications are forthcoming.

Can you please confirm whether or not an addendum will be issued for this project, and whether or not the bid date will remain as 10/13/99?

Addendum #1, #2 and #3 have been issued. Bid opening has been delayed by Addendum #3. Bid opening date is October 27, 1999.

67. In the Standard Specifications, in Section 49-1.09, the Contractor has the option of pile anchor dowels. Is this allowed? Are there details available? On sheet 280 of 347, the PC/PS concrete pile shows the "no splice allowed in pile reinf" for the vertical reinforcement, the No. 32 bars in Alternative 1 have 1.45 meter stick-up and Alternative 2 have 1.68 meter stick-up . How can this be accomplished?

No splices will be allowed.

68. We would like to request an extension of the bid opening because of this stringent testing required on the ultimate butt splices. We would like to run some tests to see the effects on grinding on the #25 resistance welds to make sure they will meet the requirements of an "ultimate splice".

Bid opening has been delayed by Addendum #3. Bid opening date is October 27, 1999.

69. Addendum 1 changed the payment for the cip pile plug rebar from the bridge rebar to "Drive pile" items. Wouldn't this change the bridge rebar final pay quantities?

The final pay quantities for bar reinforcing steel are correct.

70. Please provide the prevailing wage for a Precast Worker.

In this bidder inquiry and response, "precast workers" are defined as employees that will be manufacturing and supplying precast concrete for the project and will be manufacturing the precast concrete at a site other than the construction site that is set up specifically for this project. If the manufacturer/supplier of the precast concrete is not a contractor nor a subcontractor on the project, then the manufacturing and supply portion of this precast work is not covered under prevailing rate laws and is therefore not covered work. If the manufacturer/supplier of the precast concrete is a contractor or subcontractor on the project, then the precast portion of work would be covered, and prevailing rates would be required.

71. Your answer # 16. Will you issue new bid documents per addendum?

Yes, please see addendum #1 for revisions to the Engineer's Estimate.

72. Electrical Inquiry - The reference on Sheet 130/347 for overhead tubular signpost reads " near pier 38" is this a misprint?

"Near pier 38" on page 130 is a misprint. The location of the overhead sign structure in question is at Station 110+37 as shown on the "Pile Data Class 400 C" table on the same sheet.

73. Ref Spec sect 10-7.17 (1st sentence in 3rd from last paragraph on page 104) : This sentence says "the contractor forfeits one day of incentive compensation for each incident, etc. WHAT INCENTIVE COMPENSATION ??

This sentence has been removed from the Special Provisions. Please refer to addendum #1.

74. Ref Spec sect 10-1.23 PCMS : This specification requires the contractor to maintain PCMS at the job site. HOW MANY SIGNS and WHERE IS THE FURNISH SIGNS PAID FOR ?? WILL A PAY ITEM BE ADDED BY ADDENDUM??

This work will be directed by the Engineer and paid for as Extra Work as stated in the third paragraph in Section 10-1.23 "Portable Changeable Message Sign" of the contract Special Provisions.

75. Ref Spec 10-1.20 and lane closure charts 1-4 : According to the charts there is a period when the contractor is allowed to close lanes and provide one lane in each direction. DURING THIS TIME MAY BOTH OF THESE PROVIDED LANES (1 EB & 1 WB) BE ROUTED ONTO WHAT IS NOW THE WEST BOUND HALF OF THE BRIDGE VIA A CROSSOVER ??

No.

76. Ref Spec page 1 & 9 and Caltrans Web Site answer (NOT PART OF CONTRACT) #16: The specification and proposal book (THE CONTRACT) are very clear. Item 127 Mobilization is only in Alternative 3 and is not listed as a common item. If we bid alternative 1 or 2 we will probably not put money in item 127 for fear of a BID PROTEST. PLEASE CORRECT THE SPECIFICATION AND PROPOSAL BY ADDENDUM.

Item #127 Mobilization is common to all the alternatives. Please refer to addendum #1.

77. We have called the electrical maintenance phone number listed. We have not been called back. We need to know who made the existing callbox units?

Centarus Systems installed the system and provided the hardware and software needed to run the system. Jensen Electric provided the housing for the system. The companies are located at the following addresses.

Centaurs System
4425 Sess St. Suite "A"
San Diego, Ca 92109
(619) 270-4552

Jensen Electric Company
140 Jensen Street
Reno, NV 89502
(702) 322-3100

78. The U2 Utility Plan shows conduits in bold and marked P,T,G,C. These conduits do not appear in the Electrical Plans (E18). Is this work to be part of this contract, and if so, further definition of this work is required.

Conduits marked P, T, G, and C on sheet U2 are existing facilities that belong to Cellularone.

79. Does the "no splice" zone shown on the drawings apply to the field installed rebar only or does it apply to the rebar that is installed during pile manufacture?

When a "no splice" zone is shown on the plans, it applies regardless of where the splice is performed.

80. Can couplers be used for the splices?

See Section 8-4 "Ultimate Butt Splicing" of the Special Provisions.

81. For the hollow concrete pile manufacture, are the individual hoop rebar (#32) required to be welded to the longitudinal rebar (#29) in the shop? If yes, what is the approved weld detail?

Welding of hoops to longitudinal bars is not allowed.

82. For the hollow concrete pile, does the hoop rebar (#32) have to be attached to the longitudinal rebar (#29) prior to the application of the fusion-bonded epoxy?

Welding of hoops to longitudinal bars is not allowed.

83. What specification applies to shop repair to the fusion bonded epoxy coating of the rebar?

See the second and third paragraphs on page 152 of the special provisions referencing the requirements in ASTM Designation: A 934/A 934M.

84. What percentage of hoops-to-longitudinal rebars are to be welded or tied?

Welding is not allowed for tieing requirements. See Section 52-1.07 of the Standard Specifications.

85. For the approximately 1 to 1.5 meters of exposed pile reinforcement that extends above the top of pile, can the hoop repbar be welded to the longitudinal rebar in the field? If yes, what is the approved weld detail?

No welding is allowed.

86. If after pile installation the Contractor elects to chip off the concrete to expose the upper approximately 1 to 1.5 meters rebar, is the pile design adequate to drive the pile without the hoop reinforcement in that upper portion? (Note, it would allow for an easier concrete removal of that portion of the pile concrete)

No.

87. If concrete is removed from the top of the hollow concrete pile, what specification applies for the repair to the coating of the rebar?

See the second and third paragraphs on page 152 of the special provisions referencing the requirements in ASTM Designation: A 934/A 934M.

88. Does the hollow concrete pile have to be cast and manufactured in a full length pile? If not, what is the design criteria for the moment capacity design requirement of the finished pile for a pile that is post-tensioned?

No splicing is allowed.

89. Can a hollow concrete pile be assembled from shorter sections? If yes, are there any requirements for the splice?

No splicing is allowed.

90. In the manufacture of the hollow concrete pile, can the internal core used to form the hole in the pile be left in permanently?

No.

91. Are there any special design criteria (other than the notes on the drawings) for the number, size, and spacing of the tendons to be used for the prestressing?

No.

92. Will the design submittal requirements for the hollow concrete pile include signed structural calculations by a Registered Structural Engineer, with supporting performance proof testing?

No.

93. If detailed design calculations are required for the hollow concrete pile, what design standards will prevail, and what minimum loading requirements will be the criteria for acceptance?

Refer to the pile data table on the plans.

94. Depending on the answer to Question No. 88 above, what is the purpose of prestressing?

Based on design calculations.

95. In addendum 1, under "Production Test Requirements for Ultimate Butt Splices" fifth paragraph, second sentence, the specification reads "The Contractor or QCM shall select the adjacent control bar for each sample splice bar...."Since the work "bar" is singular, does the sentence mean the Contractor or QCM will select only one control bar, or he/she select two control bars (one from each side of the splice)?

One bar selected from either side of the splice will be the control bar.

96. Three supplies are listed as manufacturers of Polyurea for contract 04-045014. Tufcoat USA and Williamette Valley make pure Polyurea System while it is our understanding that Thane Coat makes a hybrid Polyurea (TC-300). The difference could alter the cost of the material as much as $250,000.

Pure Polyureas are stronger, higher tensile strength and greater degree of elongation than any hybrid system.

Pro Set is a manufacturer and applicator of polyureas and would like to bid on the project, however we would like some direction of which system is preferred.

The special provisions do not limit another manufacturer from submitting their system for Polyurea coating. The material shall meet the requirements in the special provisions. To obtain additional information for material acceptance, the Transportation Laboratory's phone number is 916-227-7000.

97. Precast double-tee calls for gray and purple epoxy coating. What happened to the green coating? We are proposing welded wire fabric for the double-tees and would like to use the green epoxy coating, if possible. Can you confirm this please.

Green epoxy coating for reinforcement including welded wire fabric is not allowed.

98. Clarification is required on sheet 98 of 214: The flange steel in the double T calls for 1 1/2 inch cover, however, two layers of 3/8" dia. rebar will mean insufficient cover to the cross bars (3/8" dia. @ 6" cc), what do we do?

The clear distance refers to the bottom flange only.

99. Do precast prestressed members, excluding piling require mineral admixtures, namely flyash and silica fume? We have been told verbally it is not required.

See addendum #1.

100. On page 152 of the Specification, Section 10-1.44 Clean and Paint Pipe Piles, it states that the limits of steel pile to be blasted and painted will be shown on the plans, I cannot locate this notation in the plans. Would you please reference the location or designate the area to be painted?

See addendum #1.

101. Is Elevation 4.4196 of the existing deck based on Mean Sea Level or Mean Lower Low Water?

No. The elevation is based on the benchmark shown on the foundation plans.

102. Will the double T or bulb T support highway loads through the stems before the CIP deck is poured?

See sheets 222 of 347 and 247 of 347 for the construction equipment loading.

103. On plan sheet 162 of 347, should there be a Bent 343A, shown for alternate 2?

See plan sheet 158 of 347.

104. On plan sheet 232 of 347, "Typical Section " for the double T-girder shows a depth D=826. On the same page the table shows a depth D=813 for all possible options. Please clarify.

See addendum #1.

105. Is the concrete fill in the pile void of the precast cap paid for as piling, erect precast concrete cap or as structural concrete bridge? Is the cast-in-place concrete that completes the precast cap, i.e., page 216 of 347, Section B-B or E-E, paid for as structural concrete or precast cap. On plans sheet 138, the section "Concrete Strength and Type Limits" seems to tell us that some cast-in-place concrete is paid for as precast cap. Please clarify.

See addendum #1. Cast-in-place portions of the bent cap are paid for as structure concrete, bridge. The bent cap are precast with cast-in-place concrete fill.

106. In the special provisions, page 152, Clean and Paint Steel Piling, paragraph 1, it states the "Limits of the steel pile...shall be as shown on the plans." We are unable to find the limits of coating for the steel piles in the plans. Please clarify.

See addendum 1.

107. In the special provisions, Clean and Paint Steel Piling, page 154, paragraph 2, it states "After driving of the piling, surfaces of steel piling shall receive a finish coat...to the limits shown on the plans." We are unable to find the limits of coating for the steel piles, for the final coat, in the plans. Please clarify.

See addendum 1.

108. Are the piles at the abutment to be coated? These piles are driven completely into the ground.

See addendum 1.

109. On sheet 98 of 214, "Prestressed Double T Girder," the right side of the plan view indicates that a #43 be allowed to be discontinued, yet there is no such bar. Please advise.

Note is incorrect, it should be #16. See addendum #1.

110. On sheet 4 of 214, "General Notes," there is a note "Concrete: All reinforcing shall be epoxy coated." Does this also refer to strands?

Epoxy coated prestressing steel is addressed in the special provisions and addendum 1.

111. On plan view, note reads "discontinue #43 at end of girder stem." What is #43? Note is incorrect, it should be #16. See addendum #1.

112. On the typical section, the note reads "#16 tot 6, 3 bundles per girder." Does a bundle contain 2-#16?

Yes.

113. Is the working force shown in the table, the total force in the double tee girder, namely type A=1350 KN per stem?

The note under Prestressing Notes refers to "The force required at center of span after all losses per unit, total two girders per unit."

114. The "X" value for types 'A' and 'E" cannot be achieved even when using 0.6" dia 270K strand. Should tendons be harped? If so, what will the "X" value be at the ends?

See addendum #1.

115. We would like to request an extension of the bid opening because of this stringent testing required on the ultimate butt splices. We would like to run some tests to see the effects on grinding on the #25 resistance welds to make sure they will meet the requirements of an "ultimate splice".

Bid opening has been delayed by Addendum #3. Bid opening date is October 27, 1999.

116. Addendum 1 changed the payment for the cip pile plug rebar from the bridge rebar to "Drive pile" items. Wouldn't this change the bridge rebar final pay quantities?

The final pay quantities for bar reinforcing steel are correct.

117. Since 8/31/99 we have sent 3 requests for clarification on the above project, and have yet to receive a response for any. It would appear that there are items in the specifications that need clarification, yet no addendum has been issued to date, we are unable to verify that one might be forthcoming, and we are within 2 weeks of the bid date. With the number of alternatives that must be considered and the lead time required by the Contractor to complete a rational and competitive bid, it seem unreasonable to assume the time left is sufficient IF any changes to the plans or specifications are forthcoming. Can you please confirm whether or not an addendum will be issued for this project, and whether or not the bid date will remain as 10/13/99.

Addendum #1, #2, #3, and #4 have been issued at this time. Bid opening has been delayed by Addendum #3. Bid opening date is October 27, 1999. Please check the Toll Bridge website for addenda issued.

118. a) Will the Contractor be charged working days during the pile test period as outline on page 129 of the specifications if this impacts the controlling item of work?
b) Plan sheet 280 indicates that concrete pile reinforcement is continuous through cap. This means we would have to break back approximately 5' of pile. This would probably result in damage to epoxy coating of rebar. How do we repair?

a) Yes.
b) See the second and third paragraphs on page 152 of the special provisions referencing the requirements in ASTM Designation: A 934/A 934M.

119. a) Will fly ash and silica fume be required for precast beams and caps.
b) What is the effective ?
- illegible writing - ? of the protective coating that is called for on pages 54-55 of the specifications?

a) Yes, see addendum #1.
b) See addendum #1.

120. a) On sheet 98 of 214 "Prestressed Double T Girder", the double tee depth in the chart is 813mm, whereas the detail shows 826mm. Which governs?
b) On sheet 98 of 214 "Prestressed Double T Girder:, the x value for the c.g. of the strand is too low to work, even with 15mm strand. The lowest c.g. with 15mm strand for 3100kN is 187mm and 162mm for 2300 kN. The plans indicate an x value of 140 mm. Please advise.

a) The correct depth is 813mm. See addendum #1.
b) See addendum #1. The c.g. has been revised.

121. a) Prestress strands in piles has more than 75mm cover to the exterior face, but less than 75 mm to the interior face. Is epoxy coated strand required?
b) Can continuous spiral be substituted for the spliced hoops shown for the 1065 prestressed piles?
c) Can smaller bars at closer spacing be substituted for the spliced hoops shown for the 1065 prestressed piles?
d) Can ASTM A82 wire be substituted for the rebar hoops and spiral shown for the prestressed piles?
e) The concrete special provisions appear to repeat the same sections, for example Section 90-2.01 is on both pages 56 and 64, is this correct?

a) All prestressing steel is epoxy coated.
b) No.
c) No.
d) No.
e) See addendum #1.

122. Shrink tubes required for corrosion protection covering will not work over the dowel bar substitutes called out on sheet 110 of 214 section D-D, sheet 112 of 214 Section B-B or any other detail as such.

Unless you see an addendum, please bid in accordance with the current plans and specifications.

123. Shrink tubes required for corrosion protection covering will not work at the end anchorage detail on spirals.

Unless you see an addendum, please bid in accordance with the current plans and specifications.

124. Will the lap weld splices for the No. 13 spiral require inspection by a CWI?

Yes.

125. RE: No. 19 form savers in precast bent caps. What method of corrosion protection will work on that type of splice?

Unless you see an addendum, please bid in accordance with the current plans and specifications.

126. Shrink tubes required for corrosion protection covering will not work over the dowel bar substitutes called out on sheet 110 of 214 section D-D, sheet 112 of 214 Section B-B or any other detail as such.

Unless you see an addendum, please bid in accordance with the current plans and specifications.

127. Shrink tubes required for corrosion protection covering will not work at the end anchorage detail on spirals.

Unless you see an addendum, please bid in accordance with the current plans and specifications.

128. Will the lap weld splices for the No. 13 spiral require inspection by a CWI?

Yes.

129. Can continuous spiral be substituted for the spliced hoops shown for the 1065 prestressed piles?

No.

130. Can smaller bars at closer spacing be substituted for the spliced hoops shown for the 1065 prestressed piles?

No.

131. Can ASTM A82 wire be substituted for the rebar hoops and spiral shown for the prestressed piles?

No.

132. Specifications require that the reinforcing for the PC/PS piles is epoxy coated, even for portions of the piles that are buried 100 feet in the ground. Is Caltrans aware that it is paying a premium of approximately 5 million dollars to have epoxy coated reinforcing in the bottom half of the piles? Why not specify only those portions of the piles that actually require epoxy coated reinforcing for corrosion protection?

The limits of epoxy coated bar reinforcing steel will not be revised.

133. PC/PS piles have reinforcing bars full length. This is a very unusual and expensive design, particularly because all these bars are epoxy coated and must also be coupled. We are not aware of any moments or other loads on the bottom portions of these piles that require such massive reinforcing. It has always been standard pile design practice to curtail reinforcing below moment zones. Caltrans itself has designed many millions of feet of prestressed piling without mild reinforcing in the bottom portions. We suggest that standard commercial available bar lengths be used at the head of the piles only. Potential savings to Caltrans are in the range of 2-4 million dollars.

If you are awarded the contract, you may propose a CRIP as outlined in the Special Provisions Section 5-1.17.

134. Quantities given for 1065 mm CISS piles are incorrect. The total length for furnish piles given is apparently for 1065 PC/PS piles. Tip elevations on all CISS piles are several meters deeper than PC/PS piles so there should be more footage for CISS piles than for PC/PS piles. Should there be separate bid items for these 2 alternates or does Caltrans want to pay for additional footage for steel piles? This is not a final bid item. It will lead to at least a 2 million dollar over run on the bid quantities, probably much more if bids are unbalanced as seem likely.

The quantities shown in the Engineer's Estimate are correct. The addendum clarifies that furnish piling is based on PC/PS piles. From the Standard Specifications, piles will be measured based on the total length in place in the completed work. Therefore, if the Contractor elects to furnish the CISS piles, the Contractor will be paid for the total length in place in the completed work. There will be no separate bid items for the alternate pile type.

135. Has Caltrans made any allowance for the camber of the prestressed deck members? We calculate that cambers for the double tees will be around 3 inches and for the bulb tees 5 inches. Is the Contractor expected to adjust pile cap elevations and/or seat elevations to accommodate camber? Such adjustment will lead to thousands of extra yards of deck concrete to be paid for by the Contractor. Why doesn't Caltrans include allowance for camber in bid quantities?

In Section 10-1.36A, "Prestressed Concrete Bridge Members," of the special provisions payment for adjustments is specified as follows: Full compensation for any increase in the cost of construction, including any increase in the quantity of deck or bearing seat concrete.shall be included in the contract price paid for the various items of work involved.

137. Are the "Job Control Tests" (3 per 150 butt splices) in Section 10-1.42 "Reinforcement," of the special provisions, in additional to the "Production Tests" (4 per 150 butt splices) in Section 8-4.01, "Ultimate Butt Splices"? In other words, are there 7 tests required for every lot of 150 butt splices.

For production tests there are 4 sets of sample splices and control bars for all welded and mechanical ultimate butt splices except when quality assurance tests are performed.

138. The most practical connection for the No. 25 hoops, in piling, is a resistance butt weld. The resistance butt weld leaves sharp welds that are not acceptable to epoxy coating according to ASTM A 934. Will it be allowed to grind the sharp edges off of the weld before applying the epoxy coating?

See addendum #4.

139. The hoop that will be cut up for production samples, after it is epoxy coated, could be 3 times the expense as one sampled prior to coating. Will the production test for the resistance welded hoops be permitted to be tested at the approved fabricators yard prior to epoxy coating?

See addendum #4.

140. RE: No. 25 welded hoops for piles. a) We want to confirm that production testing is to be done before epoxy coating.
b) We'd like to confirm that final quality assurance testing will be done after epoxy coating.

a) No. Please see addendum #4.
b) Yes. Please see addendum #4.

141. a) Referring to Section 10-1.33, "Piling," I have the following question, what bid item pays for the reinforced concrete placed in the CISS pile?
b) While referring to the same section, Bid Items 91 and 112, Bar Reinforcing Steel are fixed quantity items, if we drive CISS piles that item has 2,300,000 kg of pile rebar in it for the void of the pile, if we drive PC/PS piles the 600,000 kg is paid elsewhere, why?

a) Addendum #4 includes the following paragraph to Section 10-1,33, "Piling," subsection, "Measurement and Payment": Full compensation for furnishing and placing epoxy coated reinforcement in piling shown on the plans for 600mm or larger in diameter shall be considered as included in the contract price paid per meter for furnish pile and no separate payment will be made therefor.
b) Addendum #1 has been issued and includes the following: Full compensation for furnishing and placing concrete and epoxy coated reinforcement in the void of the precast prestressed concrete piling as shown on the plans shall be considered as included in the contract unit price paid for drive pile and no separate payment will be made therefor.

142. Does Caltrans intend to clarify the application specifics desired for the concrete coatings? Is a primer desired by Caltrans if it will provide optimal performance? Will adhesion be measured? If so, what criteria will be used?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

143. Does Caltrans intend to add additional approved materials or to clarify the performance requirements so that bidders can propose responsive "or equal" coatings?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

144. Does Caltrans intend for the coating to be pinhole free? If so, how will this be measured or inspected? Will the Special Provisions be revised to all significant bugholes and surface defects to be filled?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

145. How will the thickness be measured? Industry standard methods are generally based on material consumption and area covered rather than direct measurements. Will this be acceptable?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

146. Since the coating as specified will change color (yellow) upon exposure to sunlight, is a topcoat going to be added or will the inevitable ( and irregular) color shift be acceptable to Caltrans?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

147. Alternative No. 3, sheet 271 shows 7-#5 at Typical Section No. 1 in deck, sheets 272-278 shows 7-#7, which is correct?

See addendum #4 for revisions to plan sheet no. 271.

148. RE: Sheets 271 thru 278. Part Typical Section No.1 on sheet 271 call for "#16 tot 7 per p.c. slab" for longitudinal slab reinf. Sheets 272 thru 278 show #22 cont. (7ea). Please clarify.

See addendum #4 for revisions to plan sheet no. 271.

149. In Section 10-1.36 of the special provisions, the subject of concrete coating is discussed. Can the precast company use one of the three recommended products and the general contractor use a second product? Are the different products compatible? What are the requirements for field touch up of nicks and scratches during erection?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

150. Caltrans has given a very loose specification for concrete coating, depending on the manufacturer's recommendations instead. Some manufacturers recommend that the concrete be primed with epoxy, particularly given the service environment. Others do not. Should a primer be specified? We also understand that the coating will probably yellow as a normal part of weathering. A protective topcoat should have been specified. Is Caltrans aware of these issues?

Please see addendum #5 for revisions to the subsection, "Concrete Coatings," of Section 10-1.36, "Concrete Structures."

151. I have 2 questions about the 2 electrical cables (6/4C & 4/4C). On the drawing showing the Electrical Cable Crossection, Item C. calls for "Treated water repellant jute." We use non-wicking foamed polypropylene, that we feel is better. Is this ok?

Yes.

152. Is there an existing source of water or an existing fire hydrant to tap into at the existing Toll Plaza on the eastern approach?

No.

153. Is there an existing waterline on the present bridge we could use for construction water?

No.

154. Section C-C on page 235 and Section D-D on page 239. The space between the precast bulb T is 1120 mm. The No. 36 mechanical splice shown requires a stagger of 1500 mm. How do we do this?

See addendum #4, for revisions to Section 10-1-42 "Reinforcement."

 

Please note:
Response to inquiry #18 was modified September 28, 1999
Response to inquiry #30 was modified October 4, 1999.
Response to inquiry #17 was modified October 12, 1999.
Response to inquiry #60 was modified October 12, 1999.
Response to inquiry #90 was modified October 21, 1999.
Response to inquiry #56 was modified October 22, 1999.
Inquiry and response #136 was deleted on October 26, 1999.
Response to inquiry #70 was modified October 27, 1999.

PLEASE NOTE: INQUIRIES SUBMITTED WITHIN SEVENTY-TWO (72) HOURS OF THE BID OPENING DATE MIGHT NOT BE ADDRESSED.