Bill, Just as a reminder, the option of utilizing the same design as Exechangar is still valid. Please let us know how you would like to proceed. Thanks, Clay Barnett, P.E. Town Engineer Town of Addison 16801 Westgrove Drive Addison, TX 75001-2818 Office: (972) 450-2857 -----Original Message----- From: McIllwain, Frank O. [mailto:FOMcIllwain@GarverUSA.com] Sent: Monday, March 07, 2011 11:36 PM To: Kundan Pandey; LeggettInc@aol.com Cc: Clay Barnett Subject: RE: Millionair FAARFIELD question Kundan/Bill: The assumption of k-value equal to 200 is much higher than we have seen from geotechnical investigations on airport and private projects at Addison Airport. We cannot concur with a k-value of 200. Would you like to perform laboratory test to confirm actual K-value of the material at the site or use a representative k-value from recent geotechnical investigations at Addison Airport? We believe that G-V operations of once per week is more realistic since the planned hangar is larger enough to accommodate G-V aircraft and investments in those aircraft commonly means the G-V will fly at least once per week to get a return on investment. Can we agree to consider G-V operations of once per week? Frank -----Original Message----- From: Kundan Pandey [mailto:kpandey@reed-engineering.com] Sent: Monday, March 07, 2011 10:19 AM To: McIllwain, Frank O. Cc: LeggettInc@aol.com; 'Clay Barnett' Subject: RE: Millionair FAARFIELD question Frank, No specific tests were conducted on soil samples to determine a subgrade modulus (k) value. The K-value of 200 is based on our experience with the soil type and published data. The subsurface soil is generally high to moderate plasticity clay containing varying amounts of limestone fragments and will in our opinion yield a k value of 200. The data pertaining to G-V use of the apron was provided by Mr. Bill Leggett. You will need to verify the accuracy of data with him. Please let me know if you need anything else. Thank you, Kundan Kundan K. Pandey, Ph.D., P.E. Senior Geotechnical Engineer Reed Engineering Group, Ltd. 2424 Stutz Drive Dallas, Texas 75235 Tel: 214-350-5600 X56 Fax: 214-350-5600, 214-350-0019 Email: kpandey@reed-engineering.com -----Original Message----- From: McIllwain, Frank O. [mailto:FOMcIllwain@GarverUSA.com] Sent: Friday, March 04, 2011 5:24 PM To: kundan pandey Cc: LeggettInc@aol.com; Clay Barnett Subject: RE: Millionair FAARFIELD question Kundan: I understand that subgrade modulus of 23,415 is equivalent to K-value of 200. Do you have test results from on-site soils to support using that k-value? Also, are you sure that a G-V will use the apron no more than 20 times per year for the next 20 years? That's less than half of the G-V operations planned for other recent developments at Addison Airport. In summary, the subgrade modulus and number of G-V operations seem too low. Please email me back with justification for the subgrade modulus and G-V operations used in the FAARFIELD calculation, or email a revised calculation to me. Thanks, Frank -----Original Message----- From: Kundan Pandey [mailto:kpandey@reed-engineering.com] Sent: Friday, March 04, 2011 2:00 PM To: McIllwain, Frank O. Subject: RE: Millionair FAARFIELD question Frank, The pavement design results from the FAARFIELD are attached. Let me know if you have any question. Thank you, Kundan Kundan K. Pandey, Ph.D., P.E. Senior Geotechnical Engineer Reed Engineering Group, Ltd. 2424 Stutz Drive Dallas, Texas 75235 Tel: 214-350-5600 X56 Fax: 214-350-5600, 214-350-0019 Email: kpandey@reed-engineering.com -----Original Message----- From: McIllwain, Frank O. [mailto:FOMcIllwain@GarverUSA.com] Sent: Wednesday, March 02, 2011 6:43 PM To: LeggettInc@aol.com Cc: kundan pandey; cbarnett@addisontx.gov; ronf@mission-companies.com Subject: Re: Millionair FAARFIELD question Kundan, Feel free to call my mobile number. 214-250-3967 Frank McIllwain, PE Garver, LLC On Mar 2, 2011, at 5:25 PM, "LeggettInc@aol.com" > wrote: Kundan, Per our phone conversation, Kindly call Frank Mcillwain with Garver Engineers (972 377 7480). He has a question related to your pavement recommendation for Millionair. Thanks for your help BILL LEGGETT WILLIAM LEGGETT ASSOCIATES 4600 Claire Chennault Suite 103 Addison, Texas 75001 Office 972 931 3010 Fax 972 931 3017 leggettinc@aol.com William.Leggett@sbcglobal.net