Paula, The mix design is acceptable. However, there must be a testing lab on site to take densities on backfill if flowable fill is not used and there must be lab reports on the strength of the concrete. If you have any questions, please let me know. Thanks, Clay Barnett, P.E. Town Engineer Town of Addison 16801 Westgrove Drive Addison, TX 75001-2818 Office: (972) 450-2857 From: Paula Allen [mailto:connandsons@sbcglobal.net] Sent: Wednesday, April 13, 2011 8:17 AM To: Clay Barnett Subject: Brookhaven Underground Mr. Barnett, I have attached our mix design for concrete for the above referenced project. Please call if you have any questions. Grady Ware (817) 572-0753 Office gwware@aol.com