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Viewing inquiries for 04-0J4804

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Inquiry #1: The CA High Design Manual Section 850-34 dated December 30th, 2015 warns against specifying plastic pipe in areas with a potential for fire. This project lists Alternative Pipe Culvert in the Bid Schedule. Will Caltrans still allow for plastic pipe to be used on this project?


Inquiry submitted 12/02/2022

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


Response #2:The Contractor has the option to use plastic pipe, per 2018 Standard Specification Section 61-3 ALTERNATIVE CULVERTS.
Also, The APC identified in this project is not within the fire hazard area in accordance to the CAL FIRE Office of State Fire Marshal Fire Hazard Severity Zone Map. https://osfm.fire.ca.gov/divisions/wildfire-planning-engineering/wildland-hazards-building-codes/fire-hazard-severity-zones-maps/."

Response posted 01/18/2023




Inquiry #2: FYI-Caltrans to-All Bidders- How do I register for Mandatory Pre-Bid Meeting?
Inquiry submitted 12/13/2022

Response #1:Please do not use the Bidder Inquiry platform for Mandatory Pre-Bid Meeting registration; it is for inquiries related to bidding on the project contract. Register in advance of the Mandatory Pre-Bid Meeting, and no later than 1 hour before the meeting time, by sending an email with bidder information to "D4.Construction.Duty.Senior@dot.ca.gov" Please include the project number & "Mandatory Pre-Bid Meeting", within the subject of the email.
Response posted 12/13/2022


Response #2:FYI-Contract 0J4804, Mandatory Pre-Bid Meeting is Thursday, December 15, at 10 am.
Response posted 12/13/2022




Inquiry #3: Which contractors attended the mandatory prebid meeting?
Inquiry submitted 12/15/2022

Response #1:The following Prime and Sub Contractors attended the Mandatory Virtual Prebid Meeting 04-0J4804:
S KWOK ENGINEERS, INC.
CORAL CONSTRUCTION COMPANY
HOSELEY CORPORATION
MIDSTATE BARRIER INC
GORDON N. BALL, INC.
HIGHWAY SPECIALTY COMPANY
DIRT AND AGGREGATE INTERCHANGE, INC.
BAYCITIES
MCGUIRE AND HESTER
MARTIN BROTHERS CONSTRUCTION
Response posted 12/15/2022




Inquiry #4: 200 Working Days is not near enough time to get all the various types of work done on this project. There would be too many concurrent closures for our own work not to mention the 10 other contracts listed in Section 5 that we are required to coordinate with. Please double the shifts to 400 Working Days to allow ample time to complete the work safely in cooperation with other contractors and the lane closure requirements of Section 12.
Inquiry submitted 12/20/2022

Response #1:Submitted for consideration.
Response posted 12/21/2022


Response #2:Please refer to Addendum # 1. The number of working days is revised to 250 days.
Response posted 01/18/2023




Inquiry #5: Bid Item 8 Traffic Control Supervisor quantity seems to be way off based on a 200 Working Day Project.
Inquiry submitted 12/20/2022

Response #1:Submitted for consideration.
Response posted 12/21/2022


Response #2:Per Caltrans Traffic Control Supervisor Guidelines (March 2021) it is recommended to have Traffic Control Supervisor on projects with complex traffic control requirements, such as multiple construction stages, significant changes for detours etc. For the degree of complexity, the estimated 100 days is deemed reasonable.
Response posted 01/18/2023




Inquiry #6: Please provide more details as to how the asphalt quantity of 1365 tons was arrived at for Location 2 - GR No. 33 on Plan Sheet C-14? It seems to be way overstated based on the cross sections provided on Plan Sheet X-4.
Inquiry submitted 12/20/2022

Response #1:Submitted for consideration.
Response posted 12/21/2022


Response #2:Please see revised plan sheets Q-2 and Q-4 in Addendum 1.
Response posted 01/26/2023




Inquiry #7: Please provide calculation on how the removal of Vegetation Control item 29 was calculated. From plan quantities to what is in the field has quite a delta.
Inquiry submitted 01/10/2023

Response #1:Submitted for consideration.
Response posted 01/10/2023


Response #2:Remove Vegetation Control is an aerial/spatial quantity(SQYD) calculated by multiplying the measured length with the average width of the existing vegetation control at some of existing MBGR locations. The information box at each Guardrail location in C- sheets indicates the presence or absence of any vegetation control removal work and correspondingly quantified in the Q-sheets for each location.
Response posted 01/12/2023




Inquiry #8: For protecting the work and placement for the barriers with these slabs. The slabs extend up to the ETW at locations. There is no detail given for shifting of lanes and at some locations on the ramps there is not enough room to shift the traffic and place temporary barriers. What was the intend of Caltrans for protecting the barriers while work is performed.
Inquiry submitted 01/10/2023

Response #1:Submitted for consideration.
Response posted 01/11/2023


Response #2:Caltrans believes that the work can be done within the lane closure hours. Please refer to Section 12-4.02C(3) in the Special Provisions and addendums for lane closure charts and detour plans.
Response posted 01/26/2023




Inquiry #9: There are several locations where the plans show Vegetation Control / Remove Vegetation Control but there is no quantity in the quantity table. Which is correct the table or the plans?
Location 8 - No VC Quantity in Table
Location 10 - No VC Quantity in Table
Location 90 - No Remove VC Quantity in Table
Location 100 - No Remove VC Quantity in Table


Inquiry submitted 01/10/2023

Response #1:Submitted for consideration.
Response posted 01/11/2023




Inquiry #10: There are several locations where krail / crash cushions are not called out in the quantity table but may need to be installed for constructability / safety issues. Please confirm if these locations should be added for K-Rail / crash cushions quantities.
Location 3 - K-Rail / crash cushion for the install of drainage pipe for Drainage system #1
Location 4 - K-Rail quantity not long enough to protect both sides of median / need 2 crash cushions one for each direction.
Location 33 / 34 - Need 2 crash cushions one for on ramp and one for mainline.
Location 67 - K-Rail / crash cushion for the install of drainage pipe for Drainage system #4
Location 71 - K-Rail / crash cushion for Concrete Barrier Transition
Location 92 - K-Rail / crash cushion for the install of drainage pipe for Drainage system #8

Inquiry submitted 01/10/2023

Response #1:Submitted for consideration.
Response posted 01/11/2023




Inquiry #11: Please confirm that the concrete barrier transition on the Structure Plans at Location #103 is no longer part of this contract since this location was removed on the Roadway Plans.
Inquiry submitted 01/10/2023

Response #1:Submitted for consideration.
Response posted 01/11/2023


Response #2:Location #103 has been deleted from the structure plans. Refer to Addendum No. 5, dated February 6, 2023. Bid per the current contract documents.
Response posted 02/06/2023




Inquiry #12: In regards to Bid Item 34 "Check and Test Existing Irrigation Facilities", and Bid Item 36, "Certify Existing Backflow Preventers", is that work only to be performed in the area that is shown on plan sheet 203 (IR-1), where the irrigation removal is to be done, in Location 2, or are we to check/test/certify all irrigation and backflows in all 5 locations across the entire scope of the project? If so, please provide the as-builts for all areas that are to be tended to.
Inquiry submitted 01/13/2023

Response #1:Submitted for consideration.
Response posted 01/13/2023


Response #2:Bid Item 34, Check and Test Existing Irrigation Facilities and Bid Item 36, Certify Existing Backflow Preventers is only at Location 2, Plan Sheet IR-1.
Response posted 01/19/2023




Inquiry #13: Location 2/27 can you confirm that we are to use detail shown on page 26 of 48 of the structure plans. The existing structure for the bridge retaining wall is severely different then as shown in the plan sheets.
Inquiry submitted 01/16/2023

Response #1:Submitted for consideration.
Response posted 01/17/2023


Response #2:Please refer to Addendum No. 5, dated February 6, 2023. Sheet 292 of 314 of the contract plans has been revised.
Response posted 02/07/2023




Inquiry #14: To add to Question #10, please confirm if location#104 should have K-Rail / crash cushions quantities in order to remove crash cushion and install new concrete slab and crash cushion TL-2?
Inquiry submitted 01/16/2023

Response #1:Submitted for consideration.
Response posted 01/17/2023




Inquiry #15: While reviewing the lane closure charts it looks like there may be some missing ramp closure charts that will need to be added in order to construct the work shown on the plans.
GR#32 Sawmill Rd EB Off-Ramp - MGS / VC
GR#52 Pine St WB Off-Ramp - MGS / VC / Dike
GR#54 Morello Rd EB Off-Ramp - MGS / VC / Dike
GR#82 Port Chicago HWY WB Off-Ramp - MGS / VC
GR #118/119 Bailey Rd EB On-Ramp - Krail Placement / MGS / VC / Dike

There are also lane closure charts for ramps that only include shoulder closures which do not have enough shoulder width for the installation equipment / safety of workers.
Will these locations be able to become full ramp closures?

GR#6 Chart J1 - Bayberry/Williow Ave EB On Ramp - Krail Placement / MGS / VC / Dike
GR#17 /18 Chart J4 - Franklin Canyon Rd WB On Ramp - Krail Placement / MGS / VC / Dike
GR#67 Chart I5 - SB 242 from EB 4 Connector - Pipe / MGS / Dike / VC
GR#74/75 Chart J20 - Port Chicago HWY WB On Ramp - MGS / Dike / VC
GR#96 Chart J13 - San Marco Blvd EB Off-Ramp - MGS / Dike / VC

Inquiry submitted 01/17/2023

Response #1:Submitted for consideration.
Response posted 01/17/2023




Inquiry #16: On Plan Sheet DD-2 Detail Trench Paving, there is a call out of 0.25' of HMA (Type H). Should this be HMA (Type A)? I was not able to locate anything in the 2018 Standard Specifications or Special Provisions on HMA (Type H).

There is a reference to a Note #4 regarding the Existing Flexible Structural Sec which is not given. Also there is not a quantity for this HMA section in either the Drainage Quantities Sheets or Summary of Quantities. Where does this get paid?

Inquiry submitted 01/18/2023

Response #1:Submitted for consideration.
Response posted 01/19/2023




Inquiry #17: In response to the response for Inquiry #5 how does Cal Trans feel that 100 days of a traffic control supervisor is correct. Even with adjusting the working days to 250 days Contractors will likely need to have traffic control setups on average at 4 locations per night. so if we have 4 lane closures or ramp closures nightly for 250 working days you only want a Traffic Control Supervisor out there for 100 of the 250 shifts?
Inquiry submitted 01/20/2023

Response #1:Submitted for consideration.
Response posted 01/20/2023




Inquiry #18: Engineers estimate seems extremely low for the size and the complexity of the project. Please increase the Estimate so Contractors don't waste time estimating such a large project that may not be awarded.
Inquiry submitted 01/20/2023

Response #1:Submitted for consideration.
Response posted 01/20/2023


Response #2:It is believed, the estimate is correct. Please bid per current contract documents.
Response posted 01/26/2023




Inquiry #19: Location 2/33 where does the Quantity for 836b (Mod B) get paid. From running the stations and length of payment given on Sheets 301 and 302. The pay items seems to be short 61 LF for this barrier. Please confirm on how this section of barrier is to be paid and under what item.
Inquiry submitted 01/20/2023

Response #1:Submitted for consideration.
Response posted 01/20/2023


Response #2:Refer to the limits of payment of concrete barrier transition and length of transition columns shown in the location table on sheet 301 of 314 and the limits of payment and length of transition columns shown in the location table of sheet 302 of 314 of the contract plans. The concrete barrier Type 836B (Mod B) is paid for under the concrete barrier transition bid item. Bid per the current contract documents.
Response posted 01/24/2023




Inquiry #20: The project has a large amount of excess dirt that is generated from the drainage work and concrete barrier transition footings. Is this dirt to stay on site or should the contractor account for disposal of this material? If it is to be offhauled for bidding purposes should we assume class II and plan to do soil testing?
Inquiry submitted 02/02/2023

Response #1:Submitted for consideration.
Response posted 02/03/2023


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.