Response to RFI No. 13		
As of 30-Jun-2009 5:20 PM CT	
Vitruvian Infrastructure Phase 1B
4010 Marsh Lane Addison, Texas 75001 
Project Number: 1308B
	

 	Status: Complete	  	
Subject	Asphalt Connector road (permanent)  	
Reason Code   	 None 	 
Question	 The permanent asphalt connector road as shown on sheet 7 of the phasing plan and sheet 24 of the paving plan shows to have 6" of lime stabilized under 4" of flexible base.
With this being such a small area (298 SY), could we use flexible base in lou of lime stabilized if proctors and densities are taken? Please advise if this would be acceptable for this
particular asphalt connector road. 	
Proposed Solution	 NTC proposed to use flexible base in lou of lime stabilized for the asphalt connector road by the Garden Oak Apartments. 	
Attached Files	 (none)	
 	 Section:   	 2 - Sitework 	 Int. Tracking #: 		
  	  	 Days Elapsed: 	8	 
From: 	Andrew Rolph 	 Originated: 	22-Jun-2009 4:52 PM CT	 
To: 	Jennifer Haynes, PE (First Recipient)	 Requested By:   	 25-Jun-2009 12:00 AM CT 
(Original 25-Jun-2009 4:43 PM CT)	 
Copy to:	  

Andy Nord	Joel Massey	
Nick Jacob	Jennifer Haynes, PE	
Wade Geistweidt	Bruce Dunne	
Craig Benckendorf 	Clay Barnett	

Additional Info	
	
Proposed Solution Impact	 Critical Path?   	 No 	   	  	 
Cost Change:   	 None	 Time Change:   	 None 	
Discipline Code:  	 Civil 	  	  	 
Drawing Numbers:  	 24 	 Needs Drawing Change?  	 No 	 

History (Chronological Order)	
	
Type	 Routed 	
Billable	 n/a 	
Memo	  	 
Attached Files	 (none)	
 	 From: 	Jennifer Haynes, PE	 Sent: 	23-Jun-2009 8:22 AM CT	 
To: 	Joel Massey	 Requested By:    	25-Jun-2009 4:43 PM CT	 
Copy to:  	  

Andrew Rolph	Andy Nord	
Nick Jacob	Bruce Dunne	
Clay Barnett	 	

Type	 Response 	
Billable	 n/a 	
Memo	 We have no problem with the substitution of a minimum additional 4" of Flexible Base for the 6" lime stabilized subgrade designated for the 298 SY connector road south of Ponte
Ave Station 18+50. 	 
Attached Files	 (none)	
 	 From: 	Joel Massey	 Sent: 	25-Jun-2009 4:02 PM CT	 
To: 	Jennifer Haynes, PE	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Andrew Rolph	Andy Nord	
Nick Jacob	Jennifer Haynes, PE	
Bruce Dunne	Clay Barnett	

Type	 Response 	
Billable	 n/a 	
Memo	 I think just omitting the lime stabilization is this area is sufficient. We do need to include reducing the quantity of lime stabilization in the change order by this area (298
sy). 	 
Attached Files	 (none)	
 	 From: 	Clay Barnett	 Sent: 	26-Jun-2009 2:07 PM CT	 
To: 	Joel Massey	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Andrew Rolph	Andy Nord	
Joel Massey	Nick Jacob	
Jennifer Haynes, PE	Wade Geistweidt	
Bruce Dunne	 	

Type	 Response 	
Billable	 n/a 	
Memo	 I disagree. That small connector road in on private property and may be there for some time. We do not want to reduce the quality of the section just for convenience. The cost
of substituting 4" of flexible base for the lime stabilization is very small and is more convenient.

  
Attached Files	 (none)	
 	 From: 	Joel Massey	 Sent: 	26-Jun-2009 2:30 PM CT	 
To: 	Clay Barnett	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Andrew Rolph	Andy Nord	
Joel Massey	Nick Jacob	
Jennifer Haynes, PE	Wade Geistweidt	
Bruce Dunne	 	

Type	 Response 	
Billable	 n/a 	
Memo	 Please get it in the change order. 	 
Attached Files	 (none)	
 	 From: 	Clay Barnett	 Sent: 	26-Jun-2009 3:48 PM CT	 
To: 	Joel Massey	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Joel Massey	 	

Type	 Response 	
Billable	 n/a 	
Memo	 What do you want in the change order? Remove the lime and add the additional flex base or just remove the lime? 	 
Attached Files	 (none)	
 	 From: 	Joel Massey	 Sent: 	26-Jun-2009 3:53 PM CT	 
To: 	Clay Barnett	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Joel Massey	 	

Type	 Response 	
Billable	 n/a 	
Memo	 The only problem is that the flex base costs us more. I also think that 10" of flex base under what is essentially a driveway for a parking lot seems a bit excessive. It is such
a small area that it matters not. If North Texas just wants to use the 4" of additional flex base in lieu of the lime and not increase quantities, I am fine with that as well.

  
Attached Files	 (none)	
 	 From: 	Clay Barnett	 Sent: 	26-Jun-2009 4:05 PM CT	 
To: 	Joel Massey	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Andrew Rolph	Joel Massey	
Nick Jacob	Jennifer Haynes, PE	
Wade Geistweidt	Bruce Dunne	

Type	 Routed 	
Billable	 n/a 	
Memo	 Is NTC proposing to add 4" of Flexbase and in lieu of the 6" Lime Stabilized Subgrade with no plan revision or contract quantity revision? Final pavement section would be 2" HMAC
Surface + 4" HMAC base + 8" Flexbase

  
Attached Files	 (none)	
 	 From: 	Joel Massey	 Sent: 	26-Jun-2009 4:15 PM CT	 
To: 	Andrew Rolph	 Requested By:    	25-Jun-2009 12:00 AM CT	 
Copy to:  	  

Andy Nord	Joel Massey	
Nick Jacob	Jennifer Haynes, PE	
Wade Geistweidt	Bruce Dunne	
Clay Barnett	 	

Final Response (Closing) 	
	
Response	 NTC will plan to just bill the normal quantity of lime stabilization in this area, and not charge any premium for the added flex base. Final pavement section will be 2" HMAC
Surface + 4" HMAC base + 8" Flexbase. 	 
Billable	 No 	
Attached Files	 (none)	
 	 From: 	 Andrew Rolph	 Sent:   	 30-Jun-2009 5:20 PM CT	 
To: 	Andrew Rolph	   	   	 
Copy to:  	  

Andy Nord	Joel Massey	
Nick Jacob	Jennifer Haynes, PE	
Bruce Dunne	Craig Benckendorf 	
Clay Barnett	 	

   

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