Contractor Inquiry Responses, California Toll Bridge Seismic Retrofit



OCTOBER 22, 1998

F.C.I. CONSTRUCTORS$ 10,530,573.03
TRAYLOR BROS. INC.$ 10,822,358.00

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.


The Caltrans District 11 Office is located at 2829 Juan Street, San Diego, CA 92110. The mailing address is P.O. Box 85406, San Diego, CA 92186-5400. The District 11 Duty Senior telephone number is (619) 688-6635. Please submit all inquiries by fax to (619) 688-6988.

1) Would contract plan electronic files be available to contractor?

Contract plan electronic files will not be available to Contractors.

2) Coastwise trade determination for qualified barges.

"A non-coastwise qualified barge may be used as a moored stationary work platform within the territorial waters of the United States without violating the coastwise laws, provided that it transport neither passengers nor merchandise while under tow between coastwise points." Contractors have to get all the appropriate permits from the US Coast Guard.

3) Does the worker's compensation insurance for this project fall under the jurisdiction of the United States Longshore and Harbor Worker Act/or the Jones Act?

The Jones Act (46 U.S.C. & 13 et seq.) applies to seamen and shipping and does not relate to construction workers on the bridge. The Longshore and Harbor Workers' Compensation Act (33 U.S.C. & 901 et seq.) applies to employees engaged in maritime employment. A federal court decision of the Fourth Circuit Court of Appeals has held that a construction worker employment in building a bridge over navigable water, designed to benefit both traffic and navigation, is engaged in maritime employment under the Longshore and Harbor Workers' Compensation Act. (LeMelle v. B.F. Diamond Const. Co.)(1982) (674 Fed2.d 296). Under California law (Lab. Code & 3700), every employer is responsible for being insured against liability to pay workers' compensation. That responsibility is incorporated into the Department of Transportation's (Department) construction contracts under the provisions of the Standard Specifications Section 7-1.01(A)(6) that requires the construction contractor to certify compliance with Labor Code Section 3700.

4) Where can I get the material to meet the requirements for Item 2: Temporary Noise Blanket?

Available sources are: Acoustical Solutions, Inc at 1-800-782-5742, Industrial Noise Control, Inc. at 1-800 954-1998, Acoustics First at 1-804-342-2900, Environmental Noise Corporation at 1-800-407-6863, and Noise Control Corporation at 1-800-NO-NOISE (1-800-606-6473) or Internet at
http: //,

5) Reference is made to a "no-work zone" and plywood barrier in the Feb. 4, 1997 letter from the U.S. F. & W. Where are these located?

The letter from the United States Department of the Interior; Fish and Wildlife Service dated February 4, 1997 does not apply to this project. The letter and attached drawing should be disregarded.

6) Please provide details for construction of noise blankets. The plans show locations and pay quantities only.

The method of installation shall remain at the Contractor's option. Although to clarify methods the temporary noise blanket shall be placed from the soffit to the ground along the layout line as shown on the plans. All locations where temporary anchor devices are used shall be approved by the Engineer. Upon completion of the work all temporary anchorage devises shall be removed to a minimum depth of 1" before patching.

7) Please make available the final foundation report.

The final foundation report is available for review at the District 11 Construction Office located at 2829 Juan Street, San Diego, telephone (619) 688-6635.

8) Will railroad protective liability insurance be required?


9) Footing retrofit work for Bent 37 appears to be underneath the existing Caltrans Maintenance Building. What will be the disposition of the building during construction?

While performing the retrofit work on Bent 37, the Caltrans Maintenance Building will not be occupied and the Contractor shall have full access to the work area.

10) Will the curing compound method using pigmented curing compound be allowed for the vertical surfaces of the diaphragm bolsters?


11) Will Caltrans vacate the area under bents 34-37 during construction? If so, would it be possible for the Contractor to make use of that area for the duration of the project as an office/ laydown area?

As per Section 5-1.30 AREAS FOR CONTRACTOR'S USE of the Special Provisions: No area is available within the contract limits for the exclusive use of the Contractor.

12) Will SDG&E support the power pole at bent PR46 during footing retrofit?

Attention is directed to Section 7-1.11 PRESERVATION OF PROPERTY and Section 8-1.10 UTILITY AND NON-HIGHWAY FACILITIES of the Standard Specifications, which states: The Contractor shall protect from damage utility and other non-highway facilities that are to remain in place, be installed, relocated or otherwise rearranged.

13) In regards the Section 10-1.06 of the Special Provisions it states that bents H42 - H44, H47, PR46, S43 & S44 have no murals and do not need to be protected. Currently bents H42 - H44, S43 & S44 have paintings on the lower portion of the pier columns. Please confirm that these bents will not require any protective measures.

Bents H42 H44, S43 and S44 currently have graphic art on the lower portion of the columns, they will not require protective measures. Photos are available of the park area for viewing/ ordering through the District 11 Duty Senior.

14) How can a Contractor price the required Art Protection, when there are no clear protection guidelines available in the special provisions. Are we supposed to hire an Art Conservator to bid this job? Please clarify.

Yes, as clearly stated in the special provisions an Art Conservator is required.

15) There are 2 bid item 85.

The item code is different on the second item 85 and can be referred as item 86.

16) The phone number for jobsite visits has been disconnected, please advise.

Section 5-1.34 Access to jobsite is corrected to (619) 758-9486.

17) With 120 working days, Type 2 Plant Establishment period included in the 540 working days period is not sufficient. Please advise.

The number of working days is sufficient to complete all work including plant establishment. Planting should begin immediately after completion of each stage of work and PE shall run independently in each area.

18) Can holes be cored into existing columns and pier caps to support pier cap and diaphragm construction?

No. However, holes can be drilled into the existing columns and pier caps as approved by the Engineer and as long as no existing reinforcement is damaged.

19) Refer to Plan Sheets 136, 240, 245, 272, and 314 of 359. The above noted plan sheets all make reference to roughening the existing concrete at its contact surface with new concrete. Will roughening of the new/old contact surface for all concrete (footing, column, cap, diaphragm, etc) be required? If not, please define what will be required.

All existing concrete sufaces in contact with new concrete shall be roughened as indicated on the plans.

20) Refer to Plan Sheets 157 and 325 of 359 Alternative Detail 1 and Alternative Detail 2. Is the **1" dimension a minimum? If so, what does it refer to?

The **1" dimension indicates the required concrete removal limit and references the note which allows the dimension to be increased up to 12" at the Contractor's option.

21) Refer to Plan Sheets 144, 147, 241 and 325 of 359. Can mechanical rebar splices be substituted for the footing horizontal rebar butt weld?

Plan sheets 144, 147 and 325 allow an alternative mechanical detail. On plan sheets 144 and 147 reference is made to the Pile Details sheet that shows a rebar butt weld detail and an alternative mechanical connection detail. Plan sheet 325 shows these same details. Plan Sheet 241 only shows a butt weld splice detail. Should the contractor want to use an alternative mechanical connection at this location, a proposal should be submitted to the Resident Engineer.

22) Refer to Plan Sheet 241 of 359, Detail 1. Can mechanical rebar splices be substituted for the footing horizontal rebar butt weld?

Plan Sheet 241 only shows a butt weld splice detail. Should the contractor want to use an alternative mechanical connection at this location, a proposal should be submitted to the Resident Engineer.

23) Refer to Plan Sheet 147, Section P-P. The right side of this footing detail shows #6 x 3'-0" drill and bond dowel lapping with #6 bar at 12" O/C with 2-135 degree hooks. On the left side, it calls for #6 bent bar drill and bond bar. Please clarify.

Bid what is in the contract plans and specifications

24) Refer to Plan Sheet 147, Section Q-Q. The right side of this footing detail shows bent #6 bar at 12 O/C drill and bond dowel. On the left side, it shows #6 bar with 2-135 degree hooks. Please clarify.

Bid what is in the contract plans and specifications

25) We have consistently found omissions/errors as we progress through these drawings and would like to request the bid date be postponed to correct these problems.

If there are specific errors and omissions on the plans, we need to know what they are so we can respond to them. An addendum to postpone bid opening cannot be issued unless the specific errors warrant issuing an addendum.

26) We have been advised by one of the prospective Art Conservators in your list that what is reflected in the Special Provisions is a scope rather than a spec. Also, that Caltrans maybe contracting with another one of the conservators on the list to provide that spec, this being required before a plan or quote can be provided for B.I.s 8 & 9. Further, they indicated that this spec may not be ready before Oct. 22. Is the above statement true, and if so how does Caltrans want it addressed?

No, the above statement is not accurate. Section 10-1.06 ART PROTECTION PLAN as stated in the Special Provisions is the requirements for Item 8 and Item 9. The section fully explains the requirements of the bid items and no additional guidelines are to be provided. Of the Art Conservators listed No. 7. Molly Lambert should be excluded from the list since she has been retained to provide services to Caltrans.

27) Refer to plan sheet 73 (SW-3), the summary of quantities shows 213 LF of 14" CIDH and 404.25 LF of 16" CIDH. Under which Bid Item should these piles be paid?

14" CIDH piles shall be paid for in Item 66: Sound Wall (Masonry Block), and 16" CIDH piles shall be paid for as Item 56: 16" CIDH Concrete Piling (Sound Wall).

28) Where can I find a source for the cable yield indicators?

Cable Moore at telephone (510) 272-0218.

29) Refer to Item 78: Miscellaneous Iron and Steel which items of work and sheet numbers does this item apply to?

See drainage plans.

30) Will median shoulder closures beyond the k-rail termini be required for vehicular access to the I-5 median work? If so, will there be any restrictions on when the shoulders can be closed?

Shoulder closures are not required for temporary access to the work area.

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