The drainage pattern is not "herringbone". The "laterals"... lines off the mainline are at 90 degree angles; to ensure the water gets into the pipes as quickly as possible.
The remainder of our greens are built upon at least 3 feet of sand. As our Dr. Dirt, Anton Morbach advised, no drainage is required in the greens. The water would run straight through the pipes.
Today the trenches for the green are being cut, and we are using Tex and his CAT 315. Instead of digging box shaped trenches, we will use a method we're familiar with from the past. Tex will tilt the bucket and scape out "V" shaped trenches. They are less prone to collapsing. Once the trenches are cut, gravel is placed in the bottom, pipe installed, spotted with piles of gravel, and then covered. The base of the green should be as smooth and clean as when they started.
Tony Ristola
agolfarchitect.com
+1 (909) 581 0080
