CONTRACTOR'S INQUIRY RESPONSES

June 26, 2000

CONTRACT NO. 04-012084

 

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. Inquiries submitted within seventy-two (72) hours of the bid opening date might not be addressed.

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's email address for Contractor's inquiries is Duty_Senior_Tollbridge_District04@dot.ca.gov, the telephone number is (510) 286-5549and the fax number is (510) 286-4563. All inquiries must include the contract number.

 

INQUIRY #1 The Information Handout table of contents indicated a Map 1 and Map 2. We only received Map 1, Sheet 1 of 2 and Map 1, Sheet 2 of 2. Is there a Map 2?

Map 2, referenced in the Informational Handout table of contents, is Map 1, Sheet 2 of 2.

INQUIRY #2 Geotechnical reports indicate that pile section A will have to be held in place while section be (sic) is spliced. Will the contractor be allowed to makeup Section A & B of each pile, then drive?

No. Attention is directed to Section 10-1.01, "ORDER OF WORK," of the Special Provisions. The pile installation sequence specifies that Section A has to be installed, in place, prior to welding/splicing on Section B.

INQUIRY #3 What permits are going to be required and what acquisition time frame is anticipated per the requirements of Special Provision page 66, paragraph 5?

Section 5-1.29, page 28 of the Special Provisions lists two permits acquired by the Department for this project. The permits are the Army Corps of Engineers Letter of Permission and the San Francisco Bay Conservation and Development Commission Permit #M00-2. Further, the National Marine Fisheries Service has issued an Incidental Harassment Authorization, the San Francisco Bay Regional Water Quality Control Board has issued a Waiver of Waste Dischage Requirements and the United States Coast Guard has provided a list of Approved Private Aids to Navigation.

INQUIRY #4 Please provide copies/access to the information contained in the National Marine Fisheries Service Incidental Harassment Authorization issued for this project, mentioned in Section 10-1.15, CalTrans Contract 04-012-084, Notice to Contractors and Special Provisions.

The National Marine Fisheries Service Incidental Harassment Authorization can be found at http://www.dot.ca.gov/hq/esc/tollbridge/SFOBB/EastSpan/012084/docs/PIDPdocs.html

INQUIRY #5 Re: Special Provisions pages 68 through 70: Is mammal monitoring required during pile driving for the installation of temporary structures for template support?

No. Marine mammal monitoring is only required during the driving of the State supplied piles.

INQUIRY #6 We have contacted the hammer suppliers and have discovered that one might be available on October 1, 2000, barring an unforeseen delay on the project it is on. This lack of commitment from the hammer suppliers, coupled with the $10,000 per day liquidated damages, will place a high risk on the successful Contractor that the specified hammer will be available to complete this contract in the time period specified. We request that the contract completion time be extended a minimum of 60 days in order that undue risk and associated costs not be placed as a burden on this contract.

Your request is noted.

INQUIRY #7 Please reference Special Provisions, page 36, paragraph 3. You indicated that, "Contractor shall be liable for direct manpower and equipment costs incurred by the fabricator. Subject delays shall result in liquidated damages of $560 per calendar day" or portions thereof. A) Is the liability for direct equipment and manpower and equipment in addition to the liquidated damages?; and B) if so, provide a firm dollar figure of what these charges will be prior to bid opening.

The $560 is the cost for direct manpower and equipment costs that may be incurred by the Fabricator.

INQUIRY #8 Page 63 of the Special Provisions-Center Relief Drilling. Is it the intent to have the drill rig at the pile location, or available at the contractor's yard?

Attention is directed to page 63, "CENTER RELIEF DRILLING." "On Site" is any area within the location of construction as shown on the plans.

INQUIRY #9 Please advise on the following: DOT Notice to Contractors and Special Provisions page 69, 3rd paragraph states "no entry zone" is 500 m radius. Redrawn map from NMFS recently posted on the DOT website indicates (a) 1500m radius: is this correct and a change from DOT spec above?; and nomenclature on radius line says "Proposed no buffer zone..." should state "Proposed no entry buffer zone...". Please clarify.

Thank you for your comments. The DOT Notice to Contractors and Special Provisions is correct. The map now shows a 500 meter radius "no entry buffer zone."

INQUIRY #10 Section 8-1.02 of the Special Provisions, paragraph 2c indicates the pipe for weld qualifications will be 6.0 m long. Section 10-1.12, paragraph 23 indicates that these sections are 600 mm long. Which is correct?

See Addendum #1.

INQUIRY #11 Page 62 of the Special Provisions. Can the Contractor install the backing ring to the top section of the pile being joined with a continuous fillet weld and tack weld to the bottom section? This will allow for more efficient field operations.

See Addendum #1.

INQUIRY #12 Please provide (the) address, phone (and) fax number for Gunderboom, Inc., as referenced on page 67 of the Special Provisions.

See Addendum #1.

INQUIRY #13 Re: Special Provisions, pages 62: Requirement C under "WELDING AND NON-DESTRUCTIVE TESTING FOR SPLICING OF STATE-FURNISHED STEEL PIPE PILING" states "All welds shall be made in the horizontal position." Is the Contractor allowed to weld the state supplied piling on a barge or dock to produce longer lengths before installing and driving the pile?

No. Please see the response to Bidder Inquiry #2.

INQUIRY #14 (We are) fabricating a specialised (sic) hydraulic hammer for the PIDP, SFOBB. The hammer will be a 1.3 million foot pound drop hammer using a hydraulically activated two part ram. The ram may be used in a either 81,500 lbs. or 162,500 lbs. configuration. This will enable the contractor to set and drive the initial pole sections using a lighter 650,000 foot pound. The hammer is easily converted to the 2 section ram configuration to drive the final pole sections.

APE 1.3 Pile Driving Hammer Specifications

Maximum Rated Energy 1,300,000 foot lbs. (1,760,000kNm)
Alternative ram 650,000 foot lbs. (880,000kNm)
Ram Weight 162,500 lbs (74,000kg)
Maximum Rated Stroke 8.0 feet (2.44meters)
Minimum Rated Stroke 1.0 inch (0.025meters)
Infinitely-Variable-Stroke-Height
Maximum-blows/minute
at full stroke 6 (stroke rate may increase with use of accumulators)
Ram Length 21.0 feet (2 sections @ 10.5 feet) (6.4m,2@3.2meters)
Ram diameter 54.0 inches (1370mm)
Striker plate 86,100 lbs (39,100kg)
Striker plate dimensions 132 in. dia., 30 in. thick (3.35 m dia., 762 mm thick)

See Addendum #1.

INQUIRY #15 Reference Notice to Contractors and Special Provisions, Section 10-1.16, page 72, Waterborne Noise Measurement. Please review stated upper limit requirement for frequency analysis of 200 kHz. From a practical standpoint, this value is approximately 10 times the upper range of human hearing and arguably many times higher than the expected range of noise resulting from either the impact of the hammer onto the pile or the noise generated by the aeration systems. Further, it is anticipated that the high-frequencies generated will drop off rapidly as distance from the pile increases. And finally, data-taking at 200 kHz will result in allocating an extremely large amount of mass storage space. It is our opinion that a more practical value of the upper limit of frequency analysis be specified. We look forward to your favorable concurrence.

Please bid according to the plans and specifications.

INQUIRY #16 For the acoustic monitoring, the requirement is for monitoring up to 200 kHz. This is far above the hearing for seals and sea lions and that monitored in other pile driving tests with a bubble net attenuator (about 24 kHz). There is no 200 kHz requirement listed in the Incidental Harassment Authorization from NMFS. Is the 200 kHz what Caltrans and NMFS requires?

Please bid according to the plans and specifications.

INQUIRY #17 Please reference the Proposal and Contract. Reference" Bonds and Forms Special Notice" immediately prior to page 1 and "Advanced Processing of Forms Needed to Approve Contract" immediately following page 17. The Proposal and Contract does not contain the insurance forms (DC-OE 505 and 506) as referenced. Please advise.

The Department no longer provides insurance forms. Please refer to Section 7-1.12, "INDEMNIFICATION AND INSURANCE" of the 1999 Standard Specifications.

INQUIRY #18 Per Section 10.1.01 Order of Work of the Special Provisions, items 8 and 10. The elapsed time between the completion of driving Section C and the driving of pile Section D shall not exceed 48 hours. During these periods of time, the following operations must occur: 1) Fresh head pile top C and prepare for welding; 2) Loft Section D and fit up for welding; 3) Weld a 70mm thick weld along a 7.6M periphery; 4) testing of weld; 5) Prepare and submit a Welding Report to the Engineer; 6) Wait 24 hours for the Engineer to review the report and respond in writing; and 7) Drive Section D. It is clear that the above operations cannot be done in 48 hours without the Contractor being forced to start driving at their own risk, before receiving written approval for weld quality (per page 39 paragraph 3 of the SP's) from the Engineer. We request that one of the criteria be revised to allow the operation to continue with no undue burden placed on the Contractor.

Please bid according to the plans and specifications.

INQUIRY #19 Please provide a definition of a "prototype hammer" as indicated in the addenda package for the above referenced project.

A prototype is a first, full-scale form of a new type or design of a construction, such as an original model on which something is patterned.

 

PLEASE NOTE:

The response to Inquiry #3 was amended on June 14, 2000