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Viewing inquiries for 08-1F8304

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Inquiry #1: Would polyurethane foam injection grouting be considered as an approved alternative to cementitious compaction grouting for this project?

We have been allowed to propose this method on previous projects for Caltrans that were initially designed for cement compaction grouting.

Inquiry submitted 06/18/2018

Response #1:submitted for consideration
Response posted 06/18/2018


Response #2:Polyurethane foam injection grouting is not appropriate at this location. Please bid per current contract documents.
Response posted 06/20/2018




Inquiry #2: May I ask why Caltrans feels polyurethane grouting is not appropriate for this location? Looking at the project documents it appears that it would be a very good lightweight alternative to compaction grouting in this type of situation as it will not add much weight to the top of the pipe.

If rocky soil conditions are present, holes could be pre-drilled to facilitate installation of injection tubes.

Inquiry submitted 06/20/2018

Response #1:submitted for consideration
Response posted 06/20/2018


Response #2: Please bid per current contract documents.

OGDS has extensive experience using low slump sand/cement grout and polyurethane grout. The sand/cement grouting operation as specified in the Special Provisions is the appropriate method for the site given the site material, grout tube driving characteristics, depth of grouting, multi-lift grouting at each grout point, ability to monitor and control grout cut-off criteria and use data feedback to refine grouting procedure, ability to adjust grout mix to achieve optimum results.

Driving high strength grout probes provides superior information on relative soil density and position of cavities as opposed to drilling. Driving is typically faster than drilling allowing more production within the required lane closure. OGDS knows the site soil conditions and the techniques that may be affectively applied given the soil conditions.

Response posted 06/21/2018




Inquiry #3: Can a low density low exothermic foam such as NCFI 27-004 be used to fill / abandon the culvert?
Inquiry submitted 06/21/2018

Response #1:Please see Special Provisions 71-6.03C. Bid per current contract documents.
Response posted 06/25/2018




Inquiry #4: Can you pls provide more information for the Cured In Placed pipeliner items, like kind of resin required, Required Tests, Curing process, etc..
Inquiry submitted 06/26/2018

Response #1:submitted for consideration
Response posted 06/26/2018


Response #2:Please see Addendum No.2.
Response posted 07/18/2018




Inquiry #5: Grout injection rate of 10 cubic feet/minute looks excessive. ASCE 53-10 recommends maximum pumping speed of 2 cubic feet/minute, unless filling voids. Please provide maximum pumping speed.
Inquiry submitted 07/10/2018

Response #1:submitted for consideration
Response posted 07/10/2018


Response #2:10 cubic feet per minute is the maximum rate. Please bid per current contract document.
Response posted 07/18/2018




Inquiry #6: The Notice to Bidders and Special Provisions states that the contractor must comply with the requirements of the 1602 and 401 permits for the project. Since it is the responsibility of the contractor-supplied biologist to ensure compliance, it is important to know the requirements for each permit in order to submit an accurate bid. How may we obtain these documents for review before we submit a bid?
Inquiry submitted 07/16/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:The requested documents can be viewed on the Notice to Bidder and Special Provisions, Supplemental Information ( 08-1F8304/supplemental_info/1F8304IH.pdf), Information Handout.
Response posted 07/17/2018




Inquiry #7: Is the contractor responsible for nuclear gauge compaction testing or only QA?
Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:Please see Standard Specifications 2015, Section 6 Control of Materials, for testing and sampling requirements.
Response posted 07/18/2018




Inquiry #8: Will a profilograph of the AC be required? Pre and/or post-pave? Is the Asphalt Concrete lime-treated?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2: No, project does not meet the criteria for profilograph.
Response posted 07/18/2018


Response #3:The Lime slurry marination is not a requirement for Route 330.
Response posted 07/19/2018




Inquiry #9: On spec page 11 it is noted that construction is to only occur in April through September. Will there be change order compensation made for wage increases to the contractor for work occurring in 2019 and 2020? If no, which item pays for this?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:Please see Standard Specifications 2015, Section 7-1.02K(2) Wages, concerning fluctuations to the prevailing wages. According to the advertisement date of 2018-06-18, the contractor will utilize determination 2018-1. Each craft may or may not have increases through the duration of the project. There is no compensation adjustment by the department. Please bid per current contract documents.
Response posted 07/23/2018




Inquiry #10: C - What is the status of ready-mixed concrete relating to certified payroll/prevailing wage requirements? Is this a requirement?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2: Please see Standard Specifications 2015, Section 7 Legal Relations and Responsibility to the Public. Caltrans is enforcing labor code section 1720.9, the requirements of AB219 apply. On or after July 1, 2016, the hauling and delivery of ready mixed concrete from a commercial plant to a public works job will be subject to California's prevailing wage law. Yes, ready-mix concrete is required to meet compliance to prevailing wage requirements.
Response posted 07/17/2018




Inquiry #11: Which pay item pays for temporary rumble strips noted on Spec page 12?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2: Please see Standard Specifications 2015 Section 12 Temporary Traffic Control, and Item No. 6, Traffic Control System.
Response posted 07/17/2018




Inquiry #12: Is the contractor responsible for the sampling/testing for imported borrow item as mentioned on Spec page 21? If yes, which item pays for this?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2: Yes. Please see Standard Specifications 2015, Section 6 Control of Materials, and Section 9-1.03 Payment Scope.
Response posted 07/17/2018




Inquiry #13: Which item pays for QC Manager for Trenchless culvert operation as noted on Spec page 31?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:Please see Standard Specifications 2015, Section 9-1.03 Payment Scope. Please bid per current contract documents.
Response posted 07/17/2018




Inquiry #14: I have seen a Time Related Overhead item on many Caltrans projects. This bid item list does not have one. Does this mean to include TRO in items for Mobilization and/or Job Site Management?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:This project does not meet the criteria for time related overhead. Bid per current contract documents.
Response posted 07/18/2018




Inquiry #15: Where is the Fog Seal shown on plan sheet 2 paid for?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:Please see Item No. 69 12" Rumble Strip Asphalt Concrete Pavement. See Standard Specifications 2015, Section 84-8.03BC Rumble Strips in Asphalt Concrete Pavement, and Section 9-1.03 Payment Scope.
Response posted 07/17/2018




Inquiry #16: Which item pays for Temporary Shoring as shown on plan sheet 5?

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:
Response posted 07/19/2018


Response #3:Temporary Shoring is included in the pay item #29 , Imported Borrow.
Response posted 07/19/2018




Inquiry #17: It appears there are two PCMS needed for this project but bid item is for 3 each. Please clarify and/or confirm.

Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:3 PCMS are required. A PCMS is to be placed on each end project. And the 3rd one is to be used on the project at the Resident Engineer's discretion dependent on traffic needs.
Response posted 07/19/2018




Inquiry #18: Plan sheet 48 indicates flashing portable beacon. Please add pay item or confirm incidental to traffic control system bid/pay item...
Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:Flashing portable beacon is included in Item # 6 Traffic Control System.
Response posted 07/19/2018




Inquiry #19: typically there is a rock excavation item with Caltrans bids when there is rock excavation. there is no geotechnical report provided, but a site visit shows rocky conditions... are we to assume no rock excavation because the item in the bid list is only a roadway excavation item? please clarify if there is rock and if it is incidental to roadway excavation...
Inquiry submitted 07/17/2018

Response #1:submitted for consideration
Response posted 07/17/2018


Response #2:The Geotechnical report can be found in the Supplemental Information file, 08-1F8304/Supplemental_info/08-1F8304IH.pdf, Information handouts, are included in the current contract documents. Please bid per current contract documents.
Response posted 07/18/2018




Inquiry #20: Spec pages 31 and 32 note survey support needed for the trenchless culvert including settlement monitoring... is this survey performed by the contractor? If so, is this incidental to the associated item (#57)?
Inquiry submitted 07/18/2018

Response #1:Submitted for consideration
Response posted 07/18/2018


Response #2: Survey is to performed by contractor. This work is included as part of pay item #57.
Response posted 07/19/2018




Inquiry #21: For Erosion Control Type 1 on Sheet ECL-1, Steps 2 & 3 call for 2" of compost and dry seed which would be hand cast. Sheet C-1 show the area for this to be at a 1.5:1 slope. This can prove difficult and costly due to the steepness of the slope, would it be possible to switch this to a hydroseed mix such as in Erosion control Type 3? This can save the State and Contractor money and have the same result and prove to be more feasible for both.
Inquiry submitted 07/24/2018

Response #1:submitted for consideration
Response posted 07/25/2018


Response #2: Please bid per current contract documents.
Response posted 07/25/2018




Inquiry #22: Can you please provide an engineer's estimate for the number of workdays required for the Contractor Supplied Biologist bid item?

There is inconsistency between the project requirements and the bid requests made by potential Primes regarding the duration of monitoring (e.g., in the special provisions, it clearly says weekly reports and that a monitor should be present when machines are working, but Primes are requesting bids for monthly visits). Please help.

Inquiry submitted 07/25/2018

Response #1:submitted for consideration
Response posted 07/25/2018


Response #2:The Contract Biologist is required to perform activities as described in the contract documents. All work is to be completed during the 200 working days of the contract. Please see Special Provisions, Section 14 Environmental Stewardship, Revised Standard Specifications 2015, Section 14 Environmental Stewardship, Standard Specifications 2015, Section 14 Environmental Stewardship, 14-6.06D(1) General. Please bid per current contract documents.
Response posted 07/25/2018


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.


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