Seven Oaks Irrigation System Analysis Report

Bryant Taylor Gordon Golf

11/27/19

same lateral are operating together, and where 4 and 5 sprinklers are on the same station in the rough and on the range. Here again, this appears to have been a cost savings measure during construction. All greens and most greens surround sprinklers are single station operation for improved control for all 27 holes. Tee sprinklers on the west course are also primarily single station control. The tees on the original 18 holes are primarily 2 and 3 sprinklers per station. Performance Testing To evaluate the sprinkler performance, we performed six catch can tests at various locations around the course. Tests were done mostly in areas of concern, but we also did a few tests in areas that were considered to be performing well. The Irrigation Association has laid out guidelines for this type of testing which we follow. Results of the test are presented as the Distribution Uniformity or DU. Catch devices are evenly spaced throughout the test area and volumes are collected and recorded. The average volume in the lowest quarter of the catch devices is compared to the average for all devices and is expressed as a percentage. DU’s of 80% are considered Excellent, 70% is considered Good, 60% is considered Fair and anything 50% or less is considered Poor. We also map out this data for additional analysis that can sometimes suggest where problems may be occurring. Guidelines recommend that testing be done with wind speeds less than 5 miles per hour. Anything over that can substantially affect how water falls out in the pattern. During our testing, wind speeds were negligible, rarely exceeding 1 or 2 mph.

Tests were performed on 4-L, 8-L, 5-O, 9-O, 4-I and 9-I. Maps of the test areas including spacing between sprinklers, catch device locations and catch volumes are included at the back of this report in Attachment 4.

Report - Seven Oaks Irrigation System.doc

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