Seymour were appointed to undertake drainage improvements following investigations and concerns that water was not draining from the reservoir dam embankment which could cause the dam to deteriorate and erode. To overcome this, drainage was installed to either side of the 32 degree sloping reservoir embankment. Excavations were undertaken from the top to the bottom in small 6-8m increments utilising open trench excavations to install the drainage to depths of up to 1.2m and install the 14 manholes. The road drainage to the top of the reservoir was amended so that it entered into the newly installed manhole and water released via a single outfall, reducing future maintenance requirements. The challenging 32 degree slope required to use of specialist excavators and tracker dumpers that were capable of working safely on this terrain.
