Over time bunker sand becomes contaminated with fine soil particles which restrict water perculation. An analogy would be to think of new, clean sand like a window screen- water would pass quickly through the large voids of this material. Think of dirty sand like a coffee filter- the very fine particles of soil are very restrictive thus water tends to pool in the bunker rather than releasing to the drainage underneath. A major source of this contamination is from the bunker's sub grade- especially when torrential rains send rushing water through the bunker carrying (and mixing) topsoil and clay with bunker sand.
There are several products/ methods available to improve bunker performance. Essentially the idea is to keep everything in it's place. A few years ago we applied a product called Klingstone in the left bunker next to old 9 green. We are happy with this product and this bunker performs well. This week we have begun a "trial run" at utilizing some relatively new bunker lining products from Sandtrapper. We will be utilizing these products in the left bunker on #13 and #16. Every golf course is different so we want to find out what works best at Wakonda and get feedback from our golfing members.
|We started by removing the old sand as well as the old drain pipe and surrounding gravel.|
|In this bunker we experimented with the drainage by lining the trenches with Sandtrapper II. We utilized drain pipe wrapped with a fabric sock. The pipe is then covered with sand.|
|The sub grade is then covered with the Sandtrapper fabric.|
|The fabric is held down by 6 inch sod staples spaced 8 inches apart.|
|We then glued the staples to the fabric in an attempt to keep winter frost from pushing the staples out of the ground.|
|The end result- before sand. Notice we are also experimenting with two different Sandtrapper products.|