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Viewing inquiries for 11-430254
Submit new inquiry for this projectInquiry #1: 1. Compaction Grouting Specification Section 19-11-03B(5)-Electronic Construction Monitoring System states that “Compaction grouting equipment must be instrumented with electronic construction monitoring system that can digitally record, display, and transmit real-time construction operation data, and warning of reaching selected operation threshold via cellular or Wi-Fi network to a web-based database that allows the operator and Engineer to view and download real-time data”.
The only commercially available compaction grouting computer monitoring system was manufactured by RST. We were informed that production for this equipment was discontinued and is no longer available. Based on experience, this type of system used for compaction grouting provided inaccurate data. We request that the computer monitoring be deleted from the specification. Pertinent information can still be reported using the industry standard equipment such as dial gauges and stoke counter for grout volume injection quantities, which can also be calibrated as the per the specification.
2. The bid items for compaction grouting are Drilling (LF) and Grouting (CF). Please provide a description for each of the items in the measurement and payment section to ensure that the time related activities for the compaction grouting are allocated to the correct bid item.
3. Is there a variance in quantity clause which allow unit price adjustment if final quantities are significantly less or more than the estimated bid quantities provided in the bid item? Please advise.
4. Compaction Grouting Specification Section 19-11-01D(2) Contractor Qualifications states that Contractors must have successfully completed at least 3 compaction grouting projects in the past 3 years and at lest 2 personnel, full-time on site, who have each completed at least compaction grouting projects in the past 3 years.
Please consider allowing contractor and personnel experience to over the past 5 years instead of 3 years to allow more pertinent project to be submitted.
Inquiry submitted 08/03/2023
Response #1:Submitted for consideration.
Response posted 08/03/2023
Response #2:Please separate Inquiry #1 and resubmit as 4 separate inquiries to expediate the responses.
Response posted 08/08/2023
Inquiry #2: Compaction Grouting Specification Section 19-11-03B(5)-Electronic Construction Monitoring System states that “Compaction grouting equipment must be instrumented with electronic construction monitoring system that can digitally record, display, and transmit real-time construction operation data, and warning of reaching selected operation threshold via cellular or Wi-Fi network to a web-based database that allows the operator and Engineer to view and download real-time data”.
The only commercially available compaction grouting computer monitoring system was manufactured by RST. We were informed that production for this equipment was discontinued and is no longer available. Based on experience, this type of system used for compaction grouting provided inaccurate data. We request that the computer monitoring be deleted from the specification. Pertinent information can still be reported using the industry standard equipment such as dial gauges and stoke counter for grout volume injection quantities, which can also be calibrated as the per the specification.
Inquiry submitted 08/08/2023
Response #1:Submitted for consideration.
Response posted 08/08/2023
Response #2:The Electronic Construction Monitoring System has been reconsidered, and an amendment will be issued once the changes have been incorporated into the project specifications.
Response posted 08/08/2023
Response #3:Please refer to Addendum #1 dated August 21, 2023.
Response posted 08/21/2023
Inquiry #3: The bid items for compaction grouting are Drilling (LF) and Grouting (CF). Please provide a description for each of the items in the measurement and payment section to ensure that the time related activities for the compaction grouting are allocated to the correct bid item.
Inquiry submitted 08/08/2023
Response #1:Submitted for consideration.
Response posted 08/08/2023
Response #2:Payment for Compaction Grouting Hole (LF) includes all work described in section 19-11.03C Establishing Grout Holes, including movement to and between holes; and Payment for Grout (Compaction Grouting) (CF) includes all other Compaction Grouting work, including section 19-11.03D Grouting and all monitoring and finishing. Ultimately it is up to the contractor to allocate time related activities at their own discretion.
Response posted 08/08/2023
Inquiry #4: Is there a variance in quantity clause which allows unit price adjustment if final quantities are significantly less or more than the estimated bid quantities provided in the bid item? Please advise.
Inquiry submitted 08/08/2023
Response #1:Submitted for consideration.
Response posted 08/08/2023
Response #2:Please refer to Standard Specifications, specifically Section 9-1.06 Changed Quantity Payment Adjustments.
Response posted 08/08/2023
Inquiry #5: Compaction Grouting Specification Section 19-11-01D(2) Contractor Qualifications states that Contractors must have successfully completed at least 3 compaction grouting projects in the past 3 years and at least 2 personnel, full-time on site, who have each completed at least compaction grouting projects in the past 3 years.
Please consider allowing contractor and personnel experience to over the past 5 years instead of 3 years to allow more pertinent project to be submitted.
Inquiry submitted 08/08/2023
Response #1:Submitted for consideration.
Response posted 08/08/2023
Response #2:Please bid per the current contract documents.
Response posted 08/08/2023
Inquiry #6: 19-11.03B(3) references ASTM C885 for the Grout Mixer. ASTM C885 is Standard Test Method for Young’s Modulus of Refractory Shapes by Sonic Resonance which is not applicable to Grout Mixers. Please provide clarification
Inquiry submitted 08/16/2023
Response #1:Submitted for consideration.
Response posted 08/16/2023
Response #2:Please refer to Addendum #1 dated August 21, 2023.
Response posted 08/21/2023
Inquiry #7: 19-11.03B(6) requires the grout delivery line to be no more than 2". Please allow larger grout delivery line sizes. 1.5" slump will pose problem with a 2" pipe.
Inquiry submitted 08/17/2023
Response #1:Submitted for consideration.
Response posted 08/17/2023
Response #2:The requirement was established based on Section 4.2.3 Hose and Fittings of ASCE G-I 53-19 Compaction Grouting Consensus Guide. Please refer to Addendum #1 dated August 21, 2023.
Response posted 08/21/2023
Inquiry #8: 19-11.03B(4) requires the pump to pump grout at continuous pressure up to 1,500 psi from 0.2 to 2 cubic feet per minute
Would a pump that is capable to pump at pressures higher than 1,500 psi be allowed ?
Would a pump that is capable to pump at flows greater than the range specified be allowed ?
Inquiry submitted 08/17/2023
Response #1:Submitted for consideration.
Response posted 08/17/2023
Response #2:Inquiry: 19-11.03B(4) requires the pump to pump grout at continuous pressure up to 1,500 psi from 0.2 to 2 cubic feet per minute
Response: 5 cubic feet per minute (CFM) is the grout injection rate noted in Section 19-11.03B(4) of the Special Provisions, not 0.2 to 2.0 CFM.
Inquiry: Would a pump that is capable to pump at pressures higher than 1,500 psi be allowed ?
Response: Yes, Please refer to Addendum #1 dated August 21, 2023.
Inquiry: Would a pump that is capable to pump at flows greater than the range specified be allowed ?
Response: Yes, Please refer to Addendum #1 dated August 21, 2023.
Response posted 08/21/2023
Inquiry #9: Pumping material with 1.5" slump or less is extremely difficult. Please allow the use of a viscosity modifier.
Inquiry submitted 08/18/2023
Response #1:Submitted for consideration.
Response posted 08/18/2023
Response #2:Please refer to Addendum #2, dated September 1, 2023.
Response posted 09/01/2023
Inquiry #10: 19-11.02B requires the aggregate must have less than 5.0 % passing #200 sieve. Locally available sand has 5.0 %
Please approve the use of sand with 5.0% passing the #200 sieve. Otherwise if sand with 4.99% passing the #200 is required sand will need to be shipped from a long distance away causing significant cost increases.
Inquiry submitted 08/18/2023
Response #1:Submitted for consideration.
Response posted 08/20/2023
Response #2:Please bid per the current contract documents. 19-11.02B does not require less than 5.0 % passing the #200 sieve.
Response posted 08/30/2023
Inquiry #11: Please remove the following requirements:
1. A positive displacement piston pump. No manufacturer makes a positive displacement piston pump.
2. The need for constant pressure. All commercially available pumps that are capable of pumping 1.5" slump or less material use a swing tube which creates a surge pressure that meets the 1,500 psi requirement. As the swing tube switches from pushing to pulling there is a slight drop in pressure in the pistons. Constant pressure is not possible.
3. The requirement to have a piston no larger than 4" in diameter. Allowing larger diameter pistons allows the use of different types of pumps increasing competition and lowering the price of the project for the state. Pumps with larger pistons can still produce the 1,500 psi minimum pressure requirement
I have contacted REED, Putzmeister, Warrior, and other brands and no one makes a positive displacement piston pump.
Inquiry submitted 08/21/2023
Response #1:Submitted for consideration.
Response posted 08/22/2023
Response #2:1. A positive displacement piston pump. No manufacturer makes a positive displacement piston pump.
Response: Please refer to Addendum #2, dated September 1, 2023.
2. The need for constant pressure. All commercially available pumps that are capable of pumping 1.5" slump or less material use a swing tube which creates a surge pressure that meets the 1,500 psi requirement. As the swing tube switches from pushing to pulling there is a slight drop in pressure in the pistons. Constant pressure is not possible.
Response: Please bid per the current contract documents. The requirement was established based on Section 4.2.2 Pumps of ASCE G-I 53-19 Compaction Grouting Consensus Guide.
3. The requirement to have a piston no larger than 4" in diameter. Allowing larger diameter pistons allows the use of different types of pumps increasing competition and lowering the price of the project for the state. Pumps with larger pistons can still produce the 1,500 psi minimum pressure requirement.
Response: Please bid per the current contract documents.
Response posted 09/01/2023
Inquiry #12: Grout pumps are not commercially available with digital readouts. Please allow the requirements of the pump system real time measurements of grout volume and grout pressure to be measured by an inline real time monitoring system that is external to the pump.
This system would be placed inline in the grout line before reaching the drill rig installing the casing
Inquiry submitted 08/21/2023
Response #1:Submitted for consideration.
Response posted 08/21/2023
Response #2:Please refer to Addendum #1 dated August 21, 2023, and bid per the current contract documents.
Response posted 08/30/2023
Inquiry #13: Locally available sand does not meet the aggregate gradation specified in addendum 1. Please approve the following gradation for a locally sourced sand:
3/4" - 100% Passing
1/2" - 100% Passing
3/8" - 100% Passing
#4 - 98% Passing
#8 - 94% Passing
#16 - 87% Passing
#30 - 80% Passing
#50 - 48% Passing
#100 - 25% Passing
#200 - 17.2% Passing
Inquiry submitted 08/21/2023
Response #1:Submitted for consideration.
Response posted 08/21/2023
Response #2:Please refer to Addendum #2, dated September 1, 2023.
Response posted 09/01/2023
Inquiry #14: Please remove the following requirements:
1. A positive displacement piston pump. No manufacturer makes a positive displacement piston pump.
2. The need for constant pressure. All commercially available pumps that are capable of pumping 1.5" slump or less material use a swing tube which creates a surge pressure that meets the 1,500 psi requirement. As the swing tube switches from pushing to pulling there is a slight drop in pressure in the pistons. Constant pressure is not possible.
3. The requirement to have a piston no larger than 4" in diameter. Allowing larger diameter pistons allows the use of different types of pumps increasing competition and lowering the price of the project for the state. Pumps with larger pistons can still produce the 1,500 psi minimum pressure requirement
I have contacted REED, Putzmeister, Warrior, and other brands and no one makes a positive displacement piston pump.
Inquiry submitted 08/22/2023
Response #1:Submitted for consideration.
Response posted 08/22/2023
Response #2:See responses to Inquiry #11. This is a repeat question.
Response posted 09/01/2023
Inquiry #15: Please confirm that Compaction Grouting can be done in the rain. 19-11.03C states that drilled holes can not be kept open when NWS predicts at least a 50% probability of rain but it does not state whether or not Compaction Grouting can be performed.
With an estimated start date of January 2024 clarity on working on the rain is needed.
Inquiry submitted 08/22/2023
Response #1:Submitted for consideration.
Response posted 08/22/2023
Response #2:Please bid accordingly. Compaction grouting work performed according to section 19-11 is not anticipated to result in open holes.
Response posted 08/30/2023
Inquiry #16: Is a Health and Safety Plan going to be required for the compaction grouting operation this time around?
It is not listed as a requirement under 19-11.01C(1) for the 9/7/2023 bid date, but was listed and required when this project was out for bid last year.
Inquiry submitted 08/22/2023
Response #1:Submitted for consideration.
Response posted 08/22/2023
Response #2:Please see Encroachment Permits section of the Information Handout regarding Local Enforcement Agency permitting for this work. An approved Community Health and Safety Plan is required from the Local Enforcement Agency per the Information Handout.
Response posted 08/30/2023
Inquiry #17: 19-11.03B(2) requires pavement coring equipment. As an alternate please approve the use of a Down The Hole Hammer or other methods to make a hole in the existing asphalt
Inquiry submitted 08/29/2023
Response #1:Submitted for consideration.
Response posted 08/29/2023
Response #2:Please bid per the current contract documents. Pavement coring is required.
Response posted 08/30/2023
Inquiry #18: Given the number of outstanding RFI's, can the bid date be extended one week to 9/14/2023?
Inquiry submitted 08/29/2023
Response #1:Submitted for consideration.
Response posted 08/29/2023
Response #2:No extension for the bid opening date. please bid per the current contract documents.
Response posted 08/30/2023
Inquiry #19: There is no mention of not being able to bring subsurface materials to the surface Under Section 19-11.038B(2) Casing Installation.
Can holes be pre-drilled using typical drilling techniques?
Inquiry submitted 08/30/2023
Response #1:Submitted for consideration.
Response posted 08/30/2023
Response #2:According to the first sentence of Section 19-11.03A General, asphalt pavement is acceptable to bring to the surface but no other materials below the asphalt pavement shall be brought to the surface. Pre-drilling methods using typical drilling techniques will bring subsurface material to the surface and are, therefore, not permitted per Section 19-11.03A. Establishing grout holes and casing installation must be performed utilizing equipment described in Section 19-11.038B(2) Casing Installation except for pavement coring which must be performed according to Section 19-11.03B(2) Pavement Coring.
Response posted 09/01/2023
Inquiry #20: Stationing called out on C-27 for mid span Anchors (calls for 5) contradict callouts on L-10, L-11( calls for 3). SOQ for minor concrete structure - Trans Block does not include all Cubic Yardage. Please Revise.
Inquiry submitted 09/01/2023
Response #1:Submitted for consideration.
Response posted 09/01/2023
Response #2:Mid-Span Anchors Detail for Concrete Barrier (Type 60M) are part of the Concrete Barrier Type 60M (LF) quantities as shown on Summary of Quantities plan Q-2. Please bid accordingly.
Response posted 09/01/2023
Inquiry #21: The CMS note on Sheet N. 223 of 479 (PD-1) Calls out to install the CMS sign Versatile Truss with Walkway. Making reference of "E" AND "SDS" SHEETS for further information. STA 283 + 50 "SR-52".
Note that no where in the reference drawings for this project calls out to furnished and/or install the CMS sign.
Please confirm that the sign will be furnished and install by the contractor.
Inquiry submitted 09/05/2023
Response #1:Submitted for consideration.
Response posted 09/06/2023
Response #2:CMS is furnished and installed by the contractor as described in Section 87-12 of the Special Provisions. Please bid per the current contract documents.
Response posted 09/06/2023
Response #3:Submitted for consideration.
Response posted 10/16/2023
Inquiry #22: The CMS note on Sheet N. 223 of 479 (PD-1) Calls out to install the CMS sign Versatile Truss with Walkway. Making reference of "E" AND "SDS" SHEETS for further information. STA 283 + 50 "SR-52".
Note that no where in the reference drawings for this project calls out to furnished and/or install the CMS sign.
Please confirm that the sign will be furnished and install by the contractor.
Inquiry submitted 09/06/2023
Response #1:Repeated inquiry, please refer to response for bidder inquiry 21.
Response posted 09/06/2023
Inquiry #23: Regarding bid item 168 Zoneguard barrier (stained). Being that the Zoneguard must be stained by Natina, will we need to add the cost of staining, plus secondary shipping to the job site? Natina says they will need to stain the Zoneguard at their facility in AZ. Can you please confirm how we should account for these extra costs?
Inquiry submitted 09/06/2023
Response #1:Submitted for consideration.
Response posted 09/06/2023
Response #2:Please refer to Section 78 INCIDENTAL CONSTRUCTION and Section 83-2.11 Zone Guard Barrier System of the Special Provisions and bid per the current contract documents.
Response posted 09/06/2023
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.