Clay, I visited the site and talked with our RPRs and the contractor at the Million Air ditch. The contractor has agreed to the following: 1. The contractor will discontinue use of electrical tools in the ditch. The generator is grounded. 2. The contractor will remove sediment from the concrete banks. 3. The contractor will install rock gabions at the entrance to the 2 - 66“ culverts. These will provide sediment protection that should withstand high-water, high velocity flows. 4. The contractor will install sediment logs on the south side of the stockpiles to contain sediment runoff. Joel also mentioned work near the south end of the runway where the contractor’s auger damaged airfield lighting cables. Wayne is investigating with the contractor to determine if all airfield lighting is still operational. If not, we will direct the contractor to repair and restore airfield lighting before dark today. Thanks for letting me know about these issues. Frank McIllwain, PE Garver 972-377-7480 From: Clay Barnett [mailto:cbarnett@addisontx.gov] Sent: Wednesday, April 20, 2011 10:28 AM To: McIllwain, Frank O. Subject: Field Observations Frank, Dave Foster and I stopped by the Million Air ditch earlier and noticed a few items of concern: 1. The electric generator they were using did not appear to be properly grounded. 2. They dug sediment from the bottom of the ditch and laid it on the banks. I am concerned that it will erode and cause problems for the airport within their drainage network. Is it possible to place a rock check dam at the headwall for the 2-66” pipes? It may help prevent any erosion that may be occurring with this work. 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 ****************************************************************************************************************** This e-mail and any files or attachments transmitted with it contains Information that is confidential and privileged. This document may contain Protected Health Information (PHI) or other information that is intended only for the use of the individual(s) and entity(ies) to whom it is addressed. If you are the intended recipient, further disclosures are prohibited without proper authorization. If you are not the intended recipient, any disclosure, copying, printing, or use of this information is strictly prohibited and possibly a violation of federal or state law and regulations. If you have received this information in error, please delete it and notify Hamid Khaleghipour at 972-450-2868 immediately. Thank you. *******************************************************************************************************************