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Viewing inquiries for 04-4G8204

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Inquiry #1: Special provision section 49-3.03C(2) states to place a minimum thickness of 3' seal course on top of the soil plug surface.
Contract drawings on sheets 93 of 107 and 96 of 107 does not show any seal course above top of soil plug. Please clarify.

Inquiry submitted 11/13/2018

Response #1:Submitted for consideration.
Response posted 11/13/2018


Response #2:Place 3 ft of seal course over the soil plugs in piles. The instructions of the Special Provisions should be followed.
Response posted 11/16/2018




Inquiry #2: We would like to seek clarification as to the design loading requirements of the guardrail system that is part of the temporary bridge.

Per the special provisions, Section 48-7.02B (1) General states that the design speed limit of the temporary bridge is to be 25 MPH.

This is then reconfirmed in Section 48-7.02B (3) Bridge Rail with the following sentence, “The regulatory speed limit must be posted for 25 MPH or less.”

In addition, in Section 48-7.02B (3), the vehicular railing and all components for the prefabricated bridge system must be designed for TL-4 loading. Following the AASHTO LRFD Bridge Design Specifications Table A13.2-1, TL-4 guardrail loading is based on a vehicle traveling at 60 MPH (i.e. Highway speeds). Since the project special provisions clearly indicate that the bridge speed is to be 25 MPH and is a single lane bridge the plausibility of achieving TL-4 speed and its associated crash angle is miniscule. Therefore TL-2 loading would be appropriate for the design of the guardrail system of the bridge.

Please see the attached guardrail details, which are designed to TL-2 loading and exceeds the 25 MPH project requirement. As shown in the details, this guardrail system utilizes “off the shelf” standard components and is readily available in the market.

Please provide confirmation that the TL-2 guardrail system will meet the project requirements as stated in the project special provisions.

Inquiry submitted 11/27/2018

Response #1:Submitted for consideration.
Response posted 11/28/2018


Response #2:Gate will be 10' double swing gate. This new gate permanently replaces what is relocated during staging.
Response posted 12/05/2018


Response #3:Bid per current contract documents. Must design for TL-4 guardrail system and post for 25 mph or less.
Response posted 12/06/2018




Inquiry #3: Can you make bridge as-built drawings available for download?
Inquiry submitted 12/11/2018

Response #1:From the Standard Specifications, Section 2-1.06B Supplemental Project Information, regarding bridge as-builts,

"For a project in District 1 through 6 or 10, you may request them from the Office of Structure Maintenance and Investigations, fax (916) 227-8357"
Response posted 12/12/2018




Inquiry #4: Plan sheet E-2 really needs to be cleaned up. The current plan sheet has two conduits crossing N/B 101, conduits are noted 6 & 7. The conduits end at a note 8 which states " To existing controller cabinet #10091. As is there is not enough detail for us to provide a bid based upon this plan sheet. We need the plan sheet to include the exact location of the existing cabinet, scale-able would be good. And i'm sure the two new conduits crossing the freeway actually go to existing pull boxes adjacent the existing controller, so please revise the plan sheet to reflect the location of the existing pull boxes as well, Thank you.
Inquiry submitted 12/18/2018

Response #1:Submitted for consideration.
Response posted 12/19/2018


Response #2:Submitted for consideration.
Response posted 12/19/2018


Response #3:The controller cabinet is located at the end of conduits 6 and 7 as specified in note 8. Use the scale shown in the plan sheet
Response posted 01/03/2019




Inquiry #5: Bid item #77 indicates that steel piling will need to be cleaned and a thermal spray coating will need to be applied to 283 Sq/Ft of piling. In looking through the pile specifications and details, there is no indications as to which pile type will need the coating and to what length each pile should be coated. Please provide clarification.
Inquiry submitted 01/18/2019

Response #1:Submitted for consideration.
Response posted 01/23/2019


Response #2:Bid per current contract documents. The thermal spray coating is only applied to the 36" CISS piles at Pier 2. Exact limits of coating varies for each pile. Reference contract plan sheet 96 of 107.
Response posted 01/25/2019




Inquiry #6: According to the California Fish and Wildlife stream bed alteration agreement letter dated 5/11/2018 in the information handout, a temporary driving template may be used for bridge construction. The paragraph then states that installation of the piles for this template can only be installed by use of a vibratory hammer only. In order to provide a temporary structure suitable for equipment to work from impacting the piles will be required to verify capacity prior to loading the structure. Please verify that utilization of an impact hammer is acceptable.

Inquiry submitted 01/18/2019

Response #1:Submitted for consideration.
Response posted 01/23/2019


Response #2:Utilization of impact hammer to install the temporary template piles is acceptable only if the temporary piles are installed inside temporary isolation casings.
Response posted 01/25/2019


Response #3:NSSP 49-2.01(C)(2), states, "You must vibrate or rotate steel shells to elevation -30 ft before the start of using a driving impact hammer for CISS concrete piles at the locations shown in the following table." This pile installation method must also be applied to the Temporary Driving Template piles.
Response posted 02/08/2019




Inquiry #7: Due to the extremely limited number of facilities that can apply the Thermal Spray coating to the steel piling specified in section 59-5 and the cost associated with the coating, would Cal Trans accept the standard inorganic zink coating per spec section 59-2 as an alternate?
Inquiry submitted 01/18/2019

Response #1:Submitted for consideration.
Response posted 01/22/2019


Response #2:No, bid per advertised contract documents.
Response posted 02/08/2019




Inquiry #8: Are there any specifications available for the "debris containment system" shows on sheet WPC-1?
Inquiry submitted 01/21/2019

Response #1:Submitted for consideration.
Response posted 01/22/2019


Response #2:The debris containment system is covered under the Standard Specifications Section 13-4, Job Site Management. The details of the system have to be prepared and submitted for approval by the contractor as specified in the Special Provisions Section 13-4.01C(1), Debris Containment, Collection and Handling Work Plan.
Response posted 01/24/2019




Inquiry #9: The Thermal Spray coating specifications in section 59-5 does not specify a coating thickness can you please clarify the coating thickness.
Inquiry submitted 01/22/2019

Response #1:Submitted for consideration.
Response posted 01/31/2019


Response #2:Reference the 4th paragraph in Section 59-5.03 of the Standard Specifications for the thermal spray coating thickness requirements.
Response posted 02/06/2019




Inquiry #10: We have been advised by precast suppliers that the delivery of precast for the project may be as far as 9 months out due to their present backlog. Has this issue been considered in the number of Working Days developed for the project?
Inquiry submitted 01/25/2019

Response #1:Submitted for consideration.
Response posted 01/28/2019


Response #2:The department does not expect that precast suppliers will require 9 months for delivery of precast elements for this project. Bid per current contract documents.
Response posted 02/06/2019


Response #3:The supplier backlog issue has been investigated. The prime contractor can hire any precast facilities (in State or out of State) to perform the works. When all suppliers are considered, the backlog should not impact the number of working days for the project. If a supplier facility is not on the approved audit list, they can go through the process of "Structural Precast Concrete Fabrication Qualification Audit" prior to the start of precast fabrication.

Please be advised that it is the prime contractor's responsibility to ensure that the precast fabrication facility(s) meet the audit's requirements.

Response posted 02/06/2019


Response #4:The department does not expect that precast suppliers will require 9 months for delivery of precast elements for this project. Bid per current contract documents.
Response posted 02/06/2019




Inquiry #11: Relating to the Bidders Inquiry #10 perhaps the entity asking the question should contact ALL the precast suppliers about this SPECIFIC project to realize that the lead times are not as stated. This project does have epoxy rebar and strand that will influence lead time but not for extent referenced in aforementioned bidders inquiry.
Inquiry submitted 02/05/2019

Response #1:Submitted for consideration.
Response posted 02/05/2019




Inquiry #12: In the specifications section 49-2.01A(3)(b) it notes that impact hammers must be equipped with a manufactured shroud or noise abatement system. Is there a requirement for certain decibels levels on this job, and if so what are the distances for the decibel levels?


Its noted that the temporary bridge requires piling. Who is responsible for the quantity and length of piles for the temporary bridge?

Inquiry submitted 02/08/2019

Response #1:Submitted for consideration.
Response posted 02/08/2019


Response #2:a) Refer to the Special Provisions Section 14-8.02 for noise restrictions and exceptions.

b) Submitted for consideration.
Response posted 02/12/2019




Inquiry #13: Your attention is directed to plan sheet 104. Please provide information to bidders so that they know how many abutment and pier piling exist for the bridge to be removed. This information should be shown on project plans with relative accuracy so that bidders can bid this complicated job accordingly.
The note on plan sheet 104 also states that any pile in conflict with new piling are to be removed in their entirety.
The plans provided by CalTrans for bridge demolition and structure construction purposes show little to no information on the location, size and capacity of existing piling. As such, Contractors have no idea how many piles may need to be removed for demolition, nor how many piles may need to be removed for new abutment & pier piling installations for this project. Please provide this information

Inquiry submitted 02/08/2019

Response #1:Submitted for consideration.
Response posted 02/11/2019




Inquiry #14: In addendum #3 its noted that installation of all piling activities are to be during 3 non consecutive 55 hour weekend closures. Does this mean that no other piling operations can take place outside the 55 hour weekend closures? Are these 55 hour weekend closures only intended for pile driving activities?


Inquiry submitted 02/11/2019

Response #1:Submitted for consideration.
Response posted 02/11/2019


Response #2:All pile driving activities shall take place during the three nonconsecutive 55 hours weekend full off-ramp closures. The contractor has the option of performing other activities during the 55 hours closures as long as the activities do not interfere with the pile driving work.
Response posted 02/12/2019




Inquiry #15: If all piling activities are to take place during the 3 55 hour weekend shutdowns, when will the dynamic monitoring take place for the pier and abutment piles? Per the specifications section 49-1.01D(4) the first production pile will be dynamicly monitored and all additional piling cannot be installed until the engineer has provided bearing capacities. This activity alone will take up 1 55 hour work window with only installing 2 piles. The second work weekend shutdown can be used to drive the remainder of abutment 1&3 piles. This same process will need to take place for pier 2 and does not give us enough working time to complete the two phase construction of pier 2.

Can piling activities take place outside the 3 55 hour weekend closures?

Inquiry submitted 02/12/2019

Response #1:The indicator PDA pile testing will be performed during the 55hr closures with immediate bearing direction or during separate closure(s) for single indicator pile installation prior to the 55hr closures.
Response posted 02/13/2019




Inquiry #16: In regards to Addendum No. 3: After talking to pile driving subcontractors, it is apparent that all the 24" CISS piling can not be installed in 3 non-consecutive 55 HR ramp closures weekends because of indicator pile / PDA requirements per CalTrans Standard specs.
Can CalTrans allow 4 non-consecutive 55 HR weekend ramp closures for the completion of the 24" CISS pile work?

Inquiry submitted 02/12/2019

Response #1:Submitted for consideration.
Response posted 02/12/2019


Response #2:See response to inquiry#15.

As for allowing 4 non-consecutive 55 HR weekend ramp closures for the completion of the 24" CISS pile work, the answer is no.
Response posted 02/13/2019




Inquiry #17: The Notice to Bidders allows 225 working days for this project (approximately 11.25 months). Preliminary pre-bid CPM schedule for this complicated and constrained project indicate that this Contract time is insufficient for reasonable completion of the project even if overtime and weekend work is estimated by bidders.
Can CalTrans allow more Contract time for this project so that Bidders are not building liquidated damages ($6,800 / day) into their bids?? 14 months minimum (280 WD) seems much more realistic

Inquiry submitted 02/12/2019

Response #1:Submitted for consideration.
Response posted 02/12/2019


Response #2:No additional contract time is allowed. Bid per plans and specs.
Response posted 02/13/2019




Inquiry #18: Addendum 3 provides bidders with the Fish and Game Streambed alteration agreement for this project. Section 2.1 of the Fish and Game permit requires that all in channel work be completed between June 15th and November 31. All 36" CISS piles will not be able to be installed during this work window given the staged construction sequence prescribed by CalTrans on SC-1, SC-2 & SC-3.

Please advise on how Contractors can comply with the permit requirements for pile driving given the current time of completion allowed by CalTrans for this project.

Inquiry submitted 02/12/2019

Response #1:Submitted for consideration.
Response posted 02/12/2019


Response #2:There is sufficient time to drive the 36" CISS in the work window given the staged construction sequence.
Response posted 02/13/2019




Inquiry #19: Addendum 3 added bid item 117, "Temporary Pedestrian Access Route" with no description of work or modifications to the plan set that would tell Contractors what work is required here. Can CalTrans provide clarity on the work required for this bid item? Is the Contractor required to provide / maintain pedestrian access across San Rafael Creek (at jobsite) for the duration of SC-1, SC-2 and SC-3 work?
Inquiry submitted 02/12/2019

Response #1:Submitted for consideration.
Response posted 02/12/2019


Response #2:Bid Item 117, Temporary Pedestrian Access does not include maintaining pedestrian access across the San Rafael Creek. The pedestrian access across the San Rafael Creek will be closed for pedestrian traffic during the entire duration of construction.
Response posted 02/13/2019


The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.07, "JOB SITE AND DOCUMENT EXAMINATION" of the Standard Specifications or any other provision of the contract, nor to excuse the contractor from full compliance with the contract. Bidders are cautioned that subsequent responses or contract addenda may change a previous response.