Abstract: Golf course drainage specifications include odd materials and procedures. Here are a few strange ones.
I see many odd specifications for golf course and sportsfield drainage systems. I saw one a few months ago that included the following construction details:
1.)Trench depth of 18 inches. (How can you keep a uniform depth if the pipe will be sloped and the turf is flat?)
2.)Pipe-4″ PVC irrigation pipe with holes drilled at 90, 180, 270, 360 degrees, every 2 inches. (This foolish engineer wanted the contractor to hand drill holes in about 4500 linear feet of pipe. Our costs with labor,pipe, and jigs was about $5.00 per linear foot. Strange, when you can buy HDPE for about a dollar and a half per linear foot.)
3.) Backfill of 6″ pea stone, 6″ sand, and 6″ of topsoil. The side of the trench to be wrapped in Mirafi cloth.( The foolishness continues. You need to perform three backfill operations with a six inch specification, Meanwhile, the sand will infiltrate the stone and clog up the tiny holes in the irrigation pipe.If he wanted the perforated pipe and sand, he should have purchased the geofabric envelop with the pipe)
Our price was about four times that of a conventional piping drainage system.