See area 5 on Aerial Photo Map. This area was part of the Greenvale Sanatorium land until 1992 when it was gazetted as part of the buffer zone for Weeroona Cemetery. In 2004 it was split off from the buffer zone and added to Woodlands Historic Park along with the remaining sanatorium land.
The dam itself dried out within 2 or 3 years of the demolition of the hospital buildings in 2005/2006. It has never been more than about half full since then. In the sanatorium era when the dam was a critical water source, water appears to have been diverted into the dam from the drainage line which runs through what is now the Weeroona Cemetery conservation zone. This shallow channel can still be seen but is not functional.
A power line to the sanatorium previously crossed just above the dam, and there is a concrete water tank and three or four water pipes of various ages (see the water supply page for details), as well as two short sewerage outfalls below the dam and possibly a gas pipe.
There appears to be an area of landfill south of the concrete tank, where there is exposed asbestos cement concealed by a large patch of Horehound. Rubbish dumping has also taken place in various spots south and north of the dam.
There are considerable areas of Chilean Needle Grass around the dam and along the northern boundary. Another very invasive weed in this area is Early Black Wattle, a larger tree than the local species Black Wattle. There is a dense stand of it on the adjacent Weeroona Cemetery Conservation Zone.
Also a problem in this area is Agapanthus, spreading from the extensive plantings along the Sanatorium access road. Sugar Gums invade from both the northern and western boundary. Large areas of Kikuyu have been eradicated, and one of these areas has been re-vegetated by Friends of Woodlands Historic Park. Annual spraying along the boundaries of the sanatorium site is needed to prevent it from encroaching again.
Despite all the disturbance and weed invasion there are many mature Red Gums and Grey Box trees, and a small patch where some other local plants survive such as Chocolate Lily, Bulbine Lily and the occasional Sun Orchid. Common Woodrush can be seen in wet years, and Clematis is common at the northern end.