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Order Number UPC State Project Number Last Date to Post Questions
F55 111282 0621-024-598, C501, B624 8/20/2021
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Question List
Subject: Permanent Casing Type: Specifications
Question Date: 8/18/2021 5:07:31 PM
Is spiral weld pipe allowed for the drilled shaft permanent steel casing?  
Answer   Date: 8/20/2021 1:00:09 PM
The Department will not allow the use of spiral weld pipe for the permanent casings in the drilled shafts.  
 
Subject: Reinforcing Steel Quantities Type: Proposal
Question Date: 8/16/2021 11:11:03 AM
The reinforcing steel for the drilled shafts, 25,360lbs, is not included for pay in the drilled shaft items and is also not included in the quantities in the proposal schedule of items. How does the department intend to pay for this material?  
Answer   Date: 8/17/2021 9:06:16 AM
The reinforcing steel for drilled shafts is in the proposal schedule list of items (Proposal Line Number 0540) for the quantity of 25,360 lbs.  
 
Subject: Bridge Stream Loading Type: Plan
Question Date: 8/16/2021 9:11:36 AM
As noted on sheet 9, the bridge will be inundated during high water events. Please provide the stream velocity during the design storm so that we may determine the stream flow loading that the bridge will be subject due during this event. Also please confirm that the high water elevation of 253.4 as shown on the section view on sheet 1 is the appropriate elevation for the design storm, or provide a different one.  
Answer   Date: 8/19/2021 9:01:00 AM
The Hydraulics Report is now available in ProjectWise. The high water stage elevation of 253.4 shown on Plan Sheet 1 exceeds the 200 year storm event. Therefore the structure would not be required to be designed to the high water storm event shown in these plans. The Hydraulics Report provides flood stage elevations and velocities for each storm event up to and including the 200 year event (Exceedance probability 0.5%). The superstructure shall be designed for storm events up to and including the 200 year storm event.  
 
Subject: Type: Specifications
Question Date: 8/12/2021 11:44:48 AM
Due to the remote location of this project we cannot get a pre-bid commitment from a concrete supplier. Per Specification 217.09 (b), Each batch of concrete shall be delivered to the site of work and discharged within 90 minutes of the time the cement is introduced into the mixture unless the Engineer approves otherwise. Can the Engineer approve an increased discharge time, and/or can VDOT provide contact information for a concrete supplier who can service this project?  
Answer   Date: 8/16/2021 4:14:12 PM
The Department does not approve an increased discharge time. The following list of concrete plants are approved for VDOT work and within 45 minutes of the project site: Allied Concrete 209 Krete Lane New Canton, VA (434) 220-3214 WC Newman 10630 Prince Edward Hwy Prospect, VA (434) 392-4241 SB Cox 1918 Anderson Hwy Powhatan, VA (804) 379-7751  
 
Question Date: 8/20/2021 2:14:09 PM
We have reached out to all of the suppliers you listed and a few more, Even with the added time, we can not get anyone to commit. Do you know of anyone else?  
Answer   Date: 8/23/2021 3:30:07 PM
Contractors are encouraged to work with an approved supplier capable of meeting the terms of the contract, with extended discharge time (150 min maximum with proper application of retarder). Please bid accordingly.  
 
Question Date: 8/18/2021 9:37:38 AM
We request you revisit the response to the above question. We have also contacted the concrete plants and cannot obtain a commitment to service the project.  
Answer   Date: 8/20/2021 10:23:14 AM
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.  
 
Question Date: 8/17/2021 2:06:40 PM
We have reached out to all of those suppliers plus several others. All of those suppliers have concerns about delivering concrete to the project due to the 90 minute discharge per the specs. If it takes about 15 minutes to batch, plus 45 minutes haul time, plus 15 minutes to test onsite, then at best there is only 15 minutes to unload a truck before it is out of spec. During some of the larger pours, a truck may end up onsite while the previous truck is discharging will have to wait. This does not leave a reasonable about of time to unload the trucks. Per the 2007 VDOT Road and Bridge Specification 217.09(b), there is a table that listed maximum discharge times based on temperature and whether retarder was added to the mix. This would give the Department an uncompromised mix and allow the contractor a reasonable amount of time to receive and discharge concrete. Would the Department consider using this specification for the concrete on this project?  
Answer   Date: 8/20/2021 10:23:33 AM
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.  
 
Question Date: 8/20/2021 2:14:09 PM
We have reached out to all of the suppliers you listed and a few more, Even with the added time, we can not get anyone to commit. Do you know of anyone else?  
Answer   Date: 8/23/2021 3:30:07 PM
Contractors are encouraged to work with an approved supplier capable of meeting the terms of the contract, with extended discharge time (150 min maximum with proper application of retarder). Please bid accordingly.  
 
Question Date: 8/18/2021 9:37:38 AM
We request you revisit the response to the above question. We have also contacted the concrete plants and cannot obtain a commitment to service the project.  
Answer   Date: 8/20/2021 10:23:14 AM
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.  
 
Question Date: 8/17/2021 2:06:40 PM
We have reached out to all of those suppliers plus several others. All of those suppliers have concerns about delivering concrete to the project due to the 90 minute discharge per the specs. If it takes about 15 minutes to batch, plus 45 minutes haul time, plus 15 minutes to test onsite, then at best there is only 15 minutes to unload a truck before it is out of spec. During some of the larger pours, a truck may end up onsite while the previous truck is discharging will have to wait. This does not leave a reasonable about of time to unload the trucks. Per the 2007 VDOT Road and Bridge Specification 217.09(b), there is a table that listed maximum discharge times based on temperature and whether retarder was added to the mix. This would give the Department an uncompromised mix and allow the contractor a reasonable amount of time to receive and discharge concrete. Would the Department consider using this specification for the concrete on this project?  
Answer   Date: 8/20/2021 10:23:33 AM
After additional consideration, the Department will extend the discharge limit to a maximum of 150 minutes with the proper application of retarder.  
 
Subject: Type: Plan
Question Date: 8/9/2021 8:22:51 AM
Can VDOT post existing bridge plans?  
Answer   Date: 8/11/2021 1:38:35 PM
As noted on Sheet 2 of the Bridge Plans, existing plans are not available.  
 

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