It runs from Upper Yarra Reservoir, and it feeds the Silvan Dam, both in the Yarra Ranges, Victoria, not open to the public though, there is a gate at the end of the road that leads to it, unfortunately if you continue walking along the Yarra-Silvan conduit trail you will find a sign saying public entry not permitted on the main gates to those Melbourne water management tracks, no sign on the gate at the end of the road though where my block is.
But it sure is a peaceful sight, with just the sound of the water running.