John,

 

On Item 1, I copied the comments from Halff Associates.  It is their teams, as part of our storm water mapping, that determined that the pipes are ellipse as opposed to arch.  I will
change this paragraph to reflect this.

 

On Item 2, the short answer is yes.  However, it would not be the Town completing this construction.  It would be TxDOT Aviation installing the EMAS at our request and they will not
be interested in providing detention for the EMAS area. Also, we have allowed Bankston to anticipate that the storage already provided by the airport would remain in effect with this
one exception.  They agreed to shoulder the burden on this in the past.  They may come back and decide to complain about this once they figure out the impacts.  We could blame it on
the FAA; there is no one to answer the phones there right now anyway and they are the cause of the need for the EMAS system.  I can put TxDOT Aviation in there, but I am afraid that
it may do more harm to than good.  I think we probably just leave it alone and address it with them if they argue the point.

 

Please let me know if you have any additional thoughts.

 

Thanks,

Clay Barnett, P.E.

Town Engineer

Town of Addison

16801 Westgrove Drive

Addison, TX 75001-2818

Office: (972) 450-2857

 <http://www.addisongreen.info/> 

 

From: Ext_mail John Hill 
Sent: Friday, August 05, 2011 11:27 AM
To: Clay Barnett
Cc: Nancy Cline; Lea Dunn; Ext_mail Jason Mathis
Subject: RE: Draft Letter on the Bankston Drainage Study

 

Clay, since the letter is written from and engineering perspective, as you might expect I don’t understand most of it, but have a couple of comments:

1.         In paragraph 4 of the comments to Appendix C, it’s stated that “[o]ur Storm Sewer inventory team has not verified the conduits in the airport at this time.”  Is that something
that the Town needs to do for the drainage plans to be completed?

 

2.         The last paragraph (9) regarding the EMAS concerns me.  Is this saying that the Town, with the increased impervious coverage resulting from the EMAS installation, is somehow
altering (volume, rate, other?) the flow of water from the Airport property onto the AN Collision property?

 

 

John

 

 

From: Clay Barnett [mailto:cbarnett@addisontx.gov] 
Sent: Friday, August 05, 2011 11:12 AM
To: John Hill
Cc: Nancy Cline; Lea Dunn; Jason Mathis; 'Skipwith, Walter'
Subject: Draft Letter on the Bankston Drainage Study

 

John,

 

I have attached a draft of the letter to Bankston, both a PDF version along with a copy in Word.

 

Please review and let me know if you have any comments.

 

Thanks,

Clay Barnett, P.E.

Town Engineer

Town of Addison

16801 Westgrove Drive

Addison, TX 75001-2818

Office: (972) 450-2857

 <http://www.addisongreen.info/>