Gabion Basket Repairs
Major repair work on the river banks of the 8th fairway were started this year. Work on the eastern side has been completed and we are now tackling the western side. Progress has been slow due to the hazards of the area being a popular landing spot for errant golf balls and the sometimes unbearable stench of the water The aim of the exercise was not only protection of the banks but also the recovery of fairway. When all the baskets have been installed, the area will be landscaped once again as fairway. We hope to complete the job by June, weather permitting.
. After the onslaught of December-January rains a few critical gabions collapsed behind the 11th green. Subsequently new baskets have been erected, protecting the 11th green. A crosswall has also been installed to break the velocity of the water
. Three crosswalls have been placed in the river in front of the 10th green. The original gabions on the river bank here were poorly constructed and with the increase in the volume of water flowing through the river, their bases have been eroded causing them to slip. This can be catastrophic due to the proximity of the 10th green. The purpose of these crosswalls are to act as dams that trap silt and protect the base of the baskets from slipping and hopefully buying us some time. I intend to do the same thing along the quebrada on the 14th and 16th fairways. More crosswalls are also needed on the 16th fairway and the 8th fairway which I intend to install.
. One of the exercises we did this dry season was to walk the river basin from start to finish and identify and repair any holes in existing gabion baskets. When a gabion basket fails or is ruptured, it causes a domino effect on the other baskets around it The strength of these baskets lie in the fact that they are laced together forming a sort of brick wall. However, if you remove one brick all the others fall.
Other Works
. The backhoe has also been busy clearing and widening the river basin. Impediments such as large rocks, tree stumps and bamboo have been removed. The entire river from the 9th fairway stretching to the 12th green has been cleared.
. A huge sump is being dug behind the 14th green which will act as a settling pond, accumulating all the silt and rocks that would normally find their way on the 14th and 16th fairway. This pond will also slow down the rate at which the water travels down the hill, thus reducing its capacity to erode the fairways. This will also protect the 14th green from being covered in silt again. If these settling ponds work as well as we think they will, water flowing through the 14th and 16th fairways will be accommodated by a grassed swale. Almost overnight the course has been transformed with the first rains from a dead brown to a lush green. The rains are welcome, but hopefully with less damaging side effects. There remain a lot of other critical areas that need to be addressed, including the 10th tee (white), the tiger tee, the 9th fairway and the 16th fairway; they have not been forgotten.This is a good opportunity to remind you that our semi annual aerifing of the greens is carded for June 13th.
WHY AERIFY?
Its a perfect sunny morning and you've just reached the first green in regulation. You feel great and you know you're within birdie range. Then, you see them, those little holes in the green. Arrrgh! They ye just aerified the course, and it's going to ruin your round, right?
Well, maybe not. Consider the fact that PGA Tour legend Tom Watson shot a sizzling record 58 at his then-home course, Kansas City Country Club, just days after the greens had been aerified. Consider also that aerification is merely a short-term disruption that has long-term benefits for the course. When you see them, remember that without those little holes, the greens would eventually die.
Like so many things, the quality of a good putting green is more than skin deep. In fact, the condition of a green has a lot to do with what goes on below the surface. In order to keep grass growing at 3/16-inch you have to have deep, healthy roots. Good roots demand oxygen. In good soil, they get the oxygen from tiny pockets of air trapped between soil and sand particles.
Over time, the traffic from golfers' feet (as well as heavy mowing equipment) tends to compact the soil under the putting green - particularly when the soil contains a lot of clay. When soil becomes compacted, the air pockets on which the roots depend are crushed, and the roots are essentially left gasping for air. Without oxygen, the grass plants will wither and die.
Aerification is a mechanical process that creates more air space in the soil and promotes deeper rooting, thus helping the grass plants stay healthy. In most cases, it's done by removing 1/2-inch cores (those plugs you sometimes see near a green or in fairways). The spaces are then filled with sand "topdressing" that helps the soil retain air space and makes it easier for roots to grow downward.
Other aerification techniques use machines with "tines" or knives that simply poke holes through the soil profile, A newer technique even uses ultra high-pressure water that's injected through the soil profile to create small holes that relieve some compaction but heal quickly. The bottom line is that aerification is a necessary practice. But before you curse the superintendent for ruining your day just think of Tom Watson.