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C C G C P L R M P S <br />OALREEKOLFOURSERELIMINARYOMGANGEASTERLANTUDY <br />I S <br />RRIGATIONYSTEM <br />T <br />he existing irrigation system at Coal Creek <br />was installed in 1989 and consists of a <br />series of pipes, control satellites, sprinkler <br />heads and a pumping system which delivers <br />water to the golf course from the pump <br />station and wet well located near the pond <br />between hole No. 11 and 12. A new pump <br />station was installed in 2009 and consists <br />of two 70 horsepower vertical turbines and <br />a 25 horse booster pump. Apparently, the <br />booster pump is not being utilized due to a leak. The control sy <br />with a state-of-the-art Rainbird computerized central control. U <br />not being used to its fullest potential because no GPS database <br />programming the control system. <br />The existing piping system consists of Class 160 PVC (poly vinyl <br />and valves which are now nearly 25 years old and plagued by freq <br />Of particular concern is the lack of thrust-blocking at “ ttings <br />service tees and the use of weaker class 160 PVC pipe. The expec <br />irrigation pipe is 25 years. <br />The original irrigation heads are Rainbird full-circle (model 51 <br />47 and 95) designed to be spaced at 70 feet on center. However, <br />varies widely & ranges between 16 feet to 80 feet on center. In <br />are worn out, broken or out of adjustment. This limited adjustm <br />results in over watering and under watering … often times only a <br />the existing heads are no longer available so, in recent years, <br />begun to replace some broken heads with newer Rainbird Eagle 700 <br />which offer more adjustability and improved precipitation rates. <br />Leaking irrigation head.Broken irrigation head. <br />H N G C A P 5 N 8, 2011 <br />ERFORTORBYOLFOURSERCHITECTSAGEOVEMBER <br />