Frank, Since the 6-inch lines are outside the RSA, I am less concerned with those than I am the 3-inch laterals. What are they made of? Are we talking about something like a fire hose, schedule 40 PVC, or something else entirely? If it is a 3-inch pipe, what is the outside diameter of the pipe, would that not be more than 3 inches? What about the sprinkler heads, do we have any detail on those, are they frangible? When they did this at DFW, was it in the RSA and taxiway safety areas? Joel Joel Jenkinson Director, Addison Airport main: (972) 392-4850 fax: (972) 788-9334 ________________________________ From: McIllwain, Frank O. [mailto:FOMcIllwain@GarverUSA.com] Sent: Monday, May 09, 2011 8:52 AM To: Jenkinson, Joel; Mcanally, Joe; Foster, David; Clay Barnett; Harry Lorton Cc: McAnally, Mitchell, R Subject: ADS Runway - Temporary Airfield Irrigation System Gentlemen, EAS is proposing to install a temporary irrigation system to help grow grass. The irrigation subcontractor has worked with EAS on similar airfield projects at DFW. Installation will include borings and conduit sleeves under the taxiways. The system will consist of 6” main lines and 3” lateral lines with sprinkler heads. The 6” will be outside the runway safety area. See the attached drawings for more detailed information. Please let me know if you have any suggestions to revise the boring locations or any other part of the proposed system. Thanks. Frank McIllwain, PE Senior Project Manager Aviation Team Leader Office: 972-377-7480 Direct: 972-377-7480 Mobile: 214-250-3967 E-mail: FOMcIllwain@GarverUSA.com ________________________________ This e-mail and any attachments contain URS Corporation confidential information that may be proprietary or privileged. If you receive this message in error or are not the intended recipient, you should not retain, distribute, disclose or use any of this information and you should destroy the e-mail and any attachments or copies.