Frank, IAM poured the concrete to the incorrect grade right in front of the T-hangars on the west side of the Planesmart ramp causing the drainage to go back into the T-hangar as opposed to draining down the ramp space. I suggested a trench drain as a possible solution. Attached is the trench drain IAM recommended using. I just wanted to check with you and see if it was capable of supporting any aircraft that would use that T-hangar or if there was another trench drain that you would recommend. Thanks, Clay Barnett, P.E. Town Engineer Town of Addison 16801 Westgrove Drive Addison, TX 75001-2818 Office: (972) 450-2857