The work on the undermining issue with the 11th ditch is almost complete and the 10th and 11th holes will be back in play at the weekend.
As mentioned previously, water was undermining the paving flags lining the bottom of the ditch. When we investigated the source of the water we found that it was coming from under the wall as well as from the outlet pipe (plastic pipe put in when the ditch was dug).
We suspected a leak in the plastic piping causing water to re-route under the wall, but digging down to look for it, we discovered the actual problem. When the ditch was originally put in, a second large diameter clay pipe had been dug through and not connected into the wall solid plastic pipe. We therefore had to dig a full trench tracing the clay pipe back towards the 11th green until we could find a suitable place to tee it into the plastic pipe.
We also knew that a drain came out of the 11th green just behind the Sycamore tree. So, whilst we were working in the area, we decided to check if this drain was already connected and, if not, connect it at the same time to help dry the green. It is just as well that we carried out this check as we discovered that it wasn’t connected in but went into a blocked clay drain. To tee-in this green drain we had to lower the plastic pipe by nearly 18 inches to get below the clay drain at this point.
With all the drains joined into the plastic pipe the trench was then back-filled.
To help maintain these drains we built a new chamber where the big clay drain, the plastic pipe, and drain from the green are all meet. This has now has a concrete base with 1 outlet. These drains will be jetted to make sure that they are clear.
Now the new chamber is finished and back-filled we can re open the holes. The base of the chamber is just over 6 feet deep, which is why we didn’t want anyone playing golf near it.
The final part of the job is to re-build the wall at the beginning of the flagged ditch, stone up, replace the concrete edging kerbs and re-flag the ditch. We will close the holes again ONLY whilst working on these jobs.
The work required to sort out this problem was much more than we had anticipated, hence the reason why the holes were closed longer than we would have liked.
One last point:
The back-filled trench is very soft, needs to bed-in, and is not ready for footfall. We are therefore building a temporary crossing point which everyone must use.