Drainage Works Update - 16th Fairway

Drainage 16^th Fairway

Phase 1 – Installation of a new 450mm drainage outlet pipe from the 16^th fairway.

Background

The existing drainage outlet from the 16^th fairway runs through a 250mm diameter pipe from the end of the open ditch to a manhole just passed the irrigation tank.

From this manhole it crosses the roadway and into another manhole in the southwest corner of the grey car park. At this point the water drains into a stone/rubble drain, which connects into an inspection chamber 25 meters south of the men’s 17^th tee.

From our investigations the piped section that runs underneath the access road is in extremely poor condition and has collapsed in a number of different places and is now beyond economic repair. 

The stone/rubble drain section, which was installed when the area was still a working quarry some 125 years ago, runs underneath the mound on the right-hand side of the 17^th tee, which is now a wooded area.

Results from the recent site survey estimate the stone/rubble drain at a depth of 7 meters, the flow tests indicates that the drain is in extremely poor condition, undoubtedly contaminated by soil and tree roots.

Planned Works

Because of health and safety regulations we have appointed drainage specialists to undertake this program of works.

They will install a new 450mm diameter solid pipe, starting from the existing manhole beside the irrigation tank and extending 100 metres east, through the rough adjacent to the 16^th fairway. At the first opening to the men’s 17th teeing ground an inspection chamber will be constructed at a depth of approximately 6 metres. The pipe will then take a ninety-degree right turn, crossing the access road and 17^th tee before finally connecting into the existing inspection chamber 25metres south of the 17^th tee.   

When the pipe-work has been installed, the trench will be backfilled and levelled ready for seeding in the spring.

Red flags showing line of new pipe-work

At this point the pipe-work crosses the road and 17th tee