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72 <br />Professional Turf & Renovation <br />October 12, 2010 <br />Troy Urdahl <br />St. Anthony New Brighton Schools <br />3303 W Ave. NE <br />St. Anthony, MN 55418 <br />Subject: Drain Tile Proposal <br />Dear Troy: <br />24144 172n"Street Phone: (763) 2632152 <br />Big Lake, MN 55309 F= (763) 263-2152 <br />After observing your baseball/soccer/softball Wds the last few years, I have some information and a <br />recommendation for improving the fields. <br />The field is sand -based but a couple of key construction Issues didn't happen for whatever reason. First, <br />the sand -peat profile is only about 6" or less in some spots. It should be 8-10" minimum with a 3" sand <br />layer below the mix. Second, drain tile was not put in the subgrade so when rain or irrigation water <br />moves through the sand quickly, it stops at the subgrade. This is an interface that serves like a bath tub <br />in that the water doesn't move into the native soil until the upper profile becomes too saturated. This <br />creates a growing medium that lacks oxygen resulting in plants that aren't as healthy or have as good of <br />a root system that they should. <br />Installation of drain tile throughout the field in a carefully designed layout will improve your field. It will <br />offer a way for the water to leave the subgrade. This will allow the field to have a better root system, <br />take more traffic and play more games. Field maintenance and operating the irrigation system will also <br />be easier and more effective. <br />I know you have seen the difference drain tile makes in performance and drainage in your stadium <br />soccer/football field. I would encourage you to do the same in your baseball/ soccer/ softball fields. if <br />you have any questions, please call. <br />Sincerely, <br />John R. Hopko <br />