Bidder Inquiries

Caltrans Bidding Connect Account:

Sign In (Sign in is required to access Project Plans)

Create Account (Click here to create a Caltrans Bidding Connect Account)


Viewing inquiries for 11-430254

Submit new inquiry for this project


Inquiry #1: Reference Bid Item 42 Compaction Grouting: Please confirm the unit of measure is "CF" not "CY".

Inquiry submitted 10/19/2022

Response #1:Submitted for consideration.
Response posted 10/19/2022


Response #2:Please refer to Addendum # 1, dated November 16, 2022.
Response posted 11/16/2022




Inquiry #2: 1) Bid Item 42 Bid Quantity is currently 595,000 CY. Based on Drawing Sheets C-3 and C-4, it seems like 39,000 cy might be more appropriate. Please confirm.
Inquiry submitted 10/20/2022

Response #1:Submitted for consideration.
Response posted 10/20/2022


Response #2:Please refer to Addendum # 1, dated November 16, 2022.
Response posted 11/16/2022




Inquiry #3: The Geotechnical Design Report for the Compaction Grouting of Landfill Material Underlaying State Route 52, dated February 15,2022 contained in the supplemental information references a 2020 compaction grouting program by S&B Contractors and Keller. Would it be possible to get a reference copy of the actual grout injection records showing grout volumes, pressures, and injection time?
Inquiry submitted 10/20/2022

Response #1:Submitted for consideration.
Response posted 10/20/2022


Response #2:Please refer to Addendum # 1, dated November 16, 2022.
Response posted 11/16/2022




Inquiry #4: According to the pavement profile sheets (P-1 thru P-24), there are locations where the OG is higher than the PG. Pavement section #3 directs a 0.20' cold plane prior to paving back the required thickness of HMA. How does the additional thickness of HMA that is required to be milled out to establish the new profile get paid?

Additionally, it appears that on sheet P-7, the labels for OG and PG are backwards. Please confirm that the dashed line is OG and solid line is PG on all profile sheets.

Inquiry submitted 11/02/2022

Response #1:Submitted for consideration.
Response posted 11/02/2022


Response #2:Please refer to Addendum # 1, dated November 16, 2022. The additional thickness of HMA that is required to be milled out will be paid as Cold Plane AC Pavement.

Response posted 11/17/2022




Inquiry #5: The CMS size on drawing PD-1 is different from CMS specification. Can you confirm if this project is asking for CMS Type 1 (308”x87”x18”)?
Inquiry submitted 11/08/2022

Response #1:Submitted for consideration.
Response posted 11/08/2022


Response #2:Yes, the project is asking for CMS Type 1.
Response posted 11/14/2022




Inquiry #6: Construction Details Sheet C-4 provides a quantity takeoff for priority zones 1-3 however no information is provided for priority zone 4. Please confirm that grouting of priority zone 4 is required as part of this contract. Additionally, please confirm that the estimated number of injection points in priority zone 4 is as follows:

Subzone P4-1 - 140
Subzone P4-2 - 13
Subzone P4-3 - 53
Subzone P4-4 - 55
Subzone P4-5 - 78

Inquiry submitted 11/10/2022

Response #1:Submitted for consideration.
Response posted 11/10/2022


Response #2:Please refer to Addendum # 1, dated November 16, 2022. P4 zones have been removed from the plans.


Response posted 11/16/2022




Inquiry #7: Bid # 0118 - 665717 - 18" Slotted Corrugated Steel Pipe (.079" thick)
Please confirm the grate height: either 2.5" or 6". Also confirm if straight or trapezoidal grate.

Inquiry submitted 11/10/2022

Response #1:Submitted for consideration.
Response posted 11/10/2022


Response #2:Use a Grate height of 6” and a Tapered Spacer for grate-slot type.

Response posted 11/30/2022




Inquiry #8: The versatile CMS Sign Structure shown on sheet 249 calls out for a walkway but no bid item exists to bid the aluminum grating - for Versatile Trusses the aluminum grating is a separate bid item 560230.
Inquiry submitted 11/11/2022

Response #1:Submitted for consideration.
Response posted 11/13/2022


Response #2:Bid Item ALUMINUM WALKWAY GRATING (VERSATILE TRUSS) is included in ADDENDUM #2, issued December 1, 2022.


Response posted 12/01/2022




Inquiry #9: Per Bid Item #8 we are to provide 500 Days of a Traffic Control Supervisor. There are no Specifications in the Bid Documents that state the details on this role. Can you please provide further clarification.
Inquiry submitted 11/14/2022

Response #1:Submitted for consideration.
Response posted 11/14/2022


Response #2:Specifications for Traffic Control Supervisor is included in ADDENDUM #2, issued December 1, 2022.
Response posted 12/01/2022




Inquiry #10: Addendum 1 has revised Compaction Grouting Bid Item 42 to a unit of measure of CF and increased the estimated quantity to 861,000 CF. Special Provisions 19-11.04 states that the Department does not adjust the unit price for an increase or decrease in the compaction grouting. The process of coring through the pavement, driving, the casing, and providing a data acquisition report for very point grouted include fixed costs which will not be covered in the event that the Bid Item 42 underruns and which can not be recovered through a unit price adjustment. Please add a bid item for coring through the pavement with a unit of measure of EACH and a bid item for driving compaction grout casing with a unit of measure of LF.
Inquiry submitted 11/18/2022

Response #1:Submitted for consideration.
Response posted 11/18/2022


Response #2:Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #11: Special Provisions Section 19-11-.03D indicate that the compaction grout injection rate must be maintained between 0.5 and 2.0 cubic feet per minute. However, the specifications go on to indicate that the average injection rate must be less than 1.5 cubic feet per minute for each hole. If it is acceptable to inject grout at a rate of up to 2.0 cubic feet per minute, then it seems reasonable that requirement for the average injection rate should be changed to "with an average injection rate less than 2.0 cubic feet per minute for each hole. " Note: review of compaction grout records from previous work at this site shows average rates on many holes in the range of 1.64 to 1.91 cubic feet per minute.
Inquiry submitted 11/18/2022

Response #1:Submitted for consideration.
Response posted 11/18/2022


Response #2:Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #12: Addendum 1 replaces Bid Item 42 with 199 and provided an estimated quantity of 861,000 CF, however if the information provided as part of the contract documents is correct (Special Provisions & Project Plan sheets) the maximum quantity of CG ranges between 1,089,666 CF using 2" casing to 1,097,289 CF if 4" casing is used. These values were derived as follows:

Section 19-11.03B(6) states "Grout Casing must be from 2 to 4 inches in diameter"
2" Casing would require .26 CF/Location to fill void left by casing in upper 12'
3" Casing would reqire .59 CF/Location to fill void left by casing in upper 12'
4" Casing would require 1.05 CF/Location to fill void left by casing in upper 12'

Section 19-11.01B treatment zone states "space bounded by surface area limits, an upper limit defined as 12-feet below ground surface" & Construction Details Sheet C-4 estimates the total number of injection points to be 9706 ea as well as the estimated maximum treatment depths for all subzones. Thus the maximum theoriatical treatment volume should be 1,087,125 CF. Adding in the maximum theroritacal volume to fill the void left by the respective casing diameters, the total maximum theorotical volume would be as follows:

2" Casing = 1,089,666 CF
3" Casing = 1,092,842 CF
4" Casing = 1,097,289 CF

Would the State consider increasing quanity of item 199

Inquiry submitted 11/18/2022

Response #1:Submitted for consideration.
Response posted 11/19/2022


Response #2:Please bid per the current contract documents.


Response posted 11/29/2022


Response #3:Submitted for consideration.
Response posted 01/18/2023




Inquiry #13: Addendum 1 replaces Bid Item 42 with 199 and provided an estimated quantity of 861,000 CF, however if the information provided as part of the contract documents is correct (Special Provisions & Project Plan sheets) the maximum quantity of CG ranges between 1,089,666 CF using 2" casing to 1,097,289 CF if 4" casing is used. These values were derived as follows:

Section 19-11.03B(6) states "Grout Casing must be from 2 to 4 inches in diameter"
2" Casing would require .26 CF/Location to fill void left by casing in upper 12'
3" Casing would require .59 CF/Location to fill void left by casing in upper 12'
4" Casing would require 1.05 CF/Location to fill void left by casing in upper 12'

Section 19-11.01B treatment zone states "space bounded by surface area limits, an upper limit defined as 12-feet below ground surface" & Construction Details Sheet C-4 estimates the total number of injection points to be 9706 ea as well as the estimated maximum treatment depths for all subzones. Thus the maximum theoretical treatment volume should be 1,087,125 CF. Adding in the maximum theoretical volume to fill the void left by the respective casing diameters, the total maximum theoretical volume would be as follows:

2" Casing = 1,089,666 CF
3" Casing = 1,092,842 CF
4" Casing = 1,097,289 CF

Would the State consider increasing quantity of item 199

Inquiry submitted 11/18/2022

Response #1:Your inquiry #13 is a repeated Inquiry that is being reviewed at this time. Please refer to Inquiry #12 response.
Response posted 11/21/2022




Inquiry #14: • Who is performing the gas monitoring during the compaction grouting? During the emergency compaction grouting work, Caltrans or consultants of Caltrans performed the monitoring. Please clarify
Inquiry submitted 11/21/2022

Response #1:Submitted for consideration.
Response posted 11/21/2022


Response #2:Specification 19-11.03C requires the contractor to determine concentration of all hazardous gases from the grout injection point hole and proceed according to an approved Health and Safety Plan.
Response posted 11/29/2022




Inquiry #15: • Can the work window or lane closure for the compaction grouting be extended to 10 hours?
Inquiry submitted 11/21/2022

Response #1:Submitted for consideration.
Response posted 11/21/2022


Response #2:Please bid per the current contract documents.


Response posted 11/29/2022




Inquiry #16: Can the work window or lane closure for the compaction grouting be extended to 12 hours? 12-hour charts were used for the compaction grouting work that was performed in 2020?
Inquiry submitted 11/22/2022

Response #1:Submitted for consideration.
Response posted 11/22/2022


Response #2:Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #17: The grout aggregate materials specified per section 19-11.02B do not comply with the industry-recommended aggregate gradations of ASCE 53-19. Please consider updating the specifications to permit a more suitable aggregate gradation for the proposed scope of work.
Inquiry submitted 11/23/2022

Response #1:Submitted for consideration.
Response posted 11/23/2022


Response #2:Our compaction grout specialist reviewed the ASCE 53-19 and confirmed that the specification does comply. Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #18: Please consider removing or modifying the minimum cement requirement incorporated in section 19-11.02B by reference to section 49-3.02B(5). As there is no minimum strength requirement presented for the compaction grout, this will lead to significant increase in project costs due to the higher than necessary cement consumption.
Inquiry submitted 11/23/2022

Response #1:Submitted for consideration.
Response posted 11/23/2022


Response #2:The specification calls for a 1 sack mix which is already a reduction from previous 2 sack mix on previous projects. An additional reduction in cement would have to be offset by an increase in aggregate that is not viewed as a significant cost reduction. Please bid per the current contract documents.


Response posted 11/29/2022




Inquiry #19: Due to the recent changes in the California cementitious materials market and availability, please consider the use of Type IL cement in place of Type II/V cement.
Inquiry submitted 11/23/2022

Response #1:Submitted for consideration.
Response posted 11/23/2022


Response #2:The revised 2018 standard specification 90-1.02B permit the use of Type IL and there is no conflicting language within the Special Provisions that would not allow it. Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #20: The 2020 Emergency Compaction Grouting project could be construed as a large-scale test program for the proposed job. In an effort to level the playing field would the State consider providing the approved Compaction Grouting mix design submittal used during the 2020 Emergency project?
Inquiry submitted 11/23/2022

Response #1:Submitted for consideration.
Response posted 11/23/2022


Response #2:Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #21: Compaction Grouting: Per Spec section 19-11.03 Finishing: Finish filled holes flush with the pavement surface to within 0.1 inch of the pavement surface. Is it Caltrans intention to open freeway to traffic with the condition, or to top off holes with something before opening to traffic?
Inquiry submitted 11/23/2022

Response #1:Submitted for consideration.
Response posted 11/23/2022


Response #2:The intention is to open the freeway to traffic in the condition on a temporary basis, while compaction grouting work is being performed. Ultimately the contractor will grind and overlay the entire AC portion of roadway before project completion.
Response posted 11/29/2022




Inquiry #22: Per plan SC-2, and SCQ-4 , we are to setup 860 LF of Krail for a Contractors Use Area. We have discussed staging area needs with all the Compaction Grouting contractors and they have all stated this area is not large enough to accommodate all of their staging needs for this magnitude of an operation. Will Caltrans consider extending this area West of the Convoy bridge and adding quantity to Bid Item 15 to cover an additional need of 800'-1000'.
Inquiry submitted 11/23/2022

Response #1:Submitted for consideration.
Response posted 11/24/2022


Response #2:Please bid per the current contract documents.
Response posted 11/29/2022




Inquiry #23: Refer to plan sheet 332. Please confirm existing conduit run number 2 that is to remain as existing. There is a conflict on the conduit legend.
Inquiry submitted 11/29/2022

Response #1:Submitted for consideration.
Response posted 11/29/2022


Response #2:Existing conduit shown between L6.376 and L6.490 on page 332 (E-7) plans is existing Lighting and Sign conduit. Please bid per the current contract documents.
Response posted 12/02/2022




Inquiry #24: Refer to plan sheet 333. Please confirm conduit run #2 is existing with (no new work) and that we should bid all discrepancies like this one for rest of the project.
Inquiry submitted 11/29/2022

Response #1:Submitted for consideration.
Response posted 11/29/2022


Response #2:Conduit #2 on SHEET No. 333, E-8, is existing. Please bid per the current contract documents.
Response posted 11/30/2022




Inquiry #25: Addendum #1 plan file is named "11-430251" confirm these plans are intended as identified for bidding purposes.
Inquiry submitted 11/29/2022

Response #1:Submitted for consideration.
Response posted 11/29/2022


Response #2:Yes. The plan file 11-430251ad1plans.pdf is for this project.
As stated in the addendum "Project plan sheets 37, 38, 41, 67, 79, 80, 81, 264, 265, 287, 290, 293, 294, 306, 307, 376, 379, and 410 are replaced and attached for substitution for the like-numbered sheets."
Response posted 11/29/2022




Inquiry #26: There is a bid item of 10 prepaving grinding days. The special provisions state that the 180 in/mi IRI smoothness requirements for prepaving corrections are replaced with the additional smoothness opportunity of segment corrections. What is the intention of the prepaving grinding days and what smoothness specification will be applied?
Inquiry submitted 11/29/2022

Response #1:Submitted for consideration.
Response posted 11/29/2022


Response #2:Item 0097 Prepaving Grinding Days was deleted per Addendum #1.
Response posted 11/30/2022




Inquiry #27: Based upon increased quantity for the compaction grouting subcontractors, they anticipate almost 500 working days just for that item. Please consider adding days to the contract to avoid additional cost to the bid for liquidated damages.
Inquiry submitted 11/30/2022

Response #1:Submitted for consideration.
Response posted 11/30/2022


Response #2:Please bid per the current contract documents.
Response posted 12/02/2022




Inquiry #28: According to bid Item #10, and Pan page SCQ-2, there is 102000 LF of Temporary Traffic Stripe. This qty does not reflect what will be needed for temporary traffic stripe after mainline RHMA. Where will the District be paying for the RHMA Temporary traffic stripe?
Inquiry submitted 12/01/2022

Response #1:Submitted for consideration.
Response posted 12/01/2022


Response #2:The Temporary Traffic Stripe for after the RHMA Work is quantified on SCQ-1, and total is reflected in the Table on SCQ-2.
Response posted 12/02/2022




Inquiry #29: As a follow-up to RFI question #11 and response #2, is it your requirement that the average pumping rate shall not exceed 1.5 cf/min? Because of the large quantity of work, there is a substantial difference in duration and cost between an average pumping rate of 1.5 cf/min and 2.0 cf/min. The way the specification is written, an average pumping rate of 2.0 cf/min is not acceptable. Please confirm.
Inquiry submitted 12/01/2022

Response #1:Submitted for consideration.
Response posted 12/01/2022


Response #2:The injection rate must not exceed 2.0 CF/min at any time, and the AVERAGE injection rate must be less than 1.5 CF/min.
An AVERAGE injection rate of 2.0 is not permissible. Please bid per the current contract documents.

Response posted 12/01/2022




Inquiry #30: Can the bid due date be extended 1 week?
Inquiry submitted 12/01/2022

Response #1:Submitted for consideration.
Response posted 12/01/2022


Response #2:Please bid per the current contract documents.
Response posted 12/02/2022




Inquiry #31: In reference to Inquiry #4, response #2 the additional thickness is to be paid as Cold Mill AC. Section 3 per Page X-1 clearly calls for a .20' Cold Mill AC, and bid item #108 quantifies this to be 108000 SY. Please either provide us with a CY quantity to cover the additional thickness of AC to be milled, create a Variable Thickness Cold Plane bid item and define that as CY , or increase bid Item #40 to cover the additional thickness that exceeds the .20' .
Inquiry submitted 12/01/2022

Response #1:Submitted for consideration.
Response posted 12/01/2022


Response #2:Please bid per the current contract documents.
Response posted 12/02/2022




Inquiry #32: In reference to Inquiry #29, response #2,“If the compaction grouting is performed at a pump rate of 2.0 cf/min, will that be considered as non-compliance?”
Inquiry submitted 12/02/2022

Response #1:Submitted for consideration.
Response posted 12/02/2022


Response #2:Please bid per the current contract documents.
Response posted 12/02/2022




Inquiry #33: Regarding the response to Inquiry #17 - the specifications as written limit the fines content to 5% for the aggregate. The recommended range is approximately 10% to 30% silt content (passing the #200 sieve). Please confirm this is acceptable.

As part of this, please provide the mix designs used by Caltrans for the two prior phases of compaction grouting performed at this location.

Thank you

Inquiry submitted 12/02/2022

Response #1:Submitted for consideration.
Response posted 12/02/2022


Response #2:Please bid per the current contract documents. The current project requirements are different from past projects.
Response posted 12/02/2022




Inquiry #34: Due to the size and complexity of this project, combined with the high DBE participation requirement, please consider extending the bid date to allow more time for participation and approach optimization.

Thank you

Inquiry submitted 12/02/2022

Response #1:Submitted for consideration.
Response posted 12/02/2022


Response #2:Please bid per the current contract documents.
Response posted 12/02/2022




Inquiry #35: In response to bidder inquiry #33 if the State was happy with the performance of the two prior projects why have they decided to change the project requirements? Again, the aggregate requirements are not in accordance with the standard of practice used by the industry, the proposed requirements will cause an unnecessary difficult pumping situation.
Inquiry submitted 12/05/2022

Response #1:Submitted for consideration.
Response posted 12/05/2022


Response #2:Please bid per the current contract documents.
Response posted 12/06/2022




Inquiry #36: What is the Engineers Estimate for just item 199 - Compaction Grouting
Inquiry submitted 12/05/2022

Response #1:Submitted for consideration.
Response posted 12/05/2022


Response #2:Regarding the Engineer's Estimate, it is in the public interest to not disclose an itemized estimated cost list to potential bidders. A sum total estimated cost of the bid items can be found on the publicly viewable website:
http://ppmoe.dot.ca.gov/des/oe/weekly-ads/all-adv-projects.php


Response posted 12/05/2022


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.