Slate Hill Leaky Weir Project
Large leaky weir after decent rain.
Landowners Jo and Rick Hoole engaged Mulloon Consulting to undertake the Slate Hill Leaky Weir Project to address an area of severe erosion at their Woomargama property in Southern NSW.
Water backing up along a former erosion gully.
Historically, erosion had been caused on the site by runoff from the surrounding hilly landscape and a seasonal stream, which cut through the valley in heavy rain.
With grant support from the Biodiversity Conservation Trust, Mulloon Consulting was engaged to visit the property and draw up a site assessment, from which three main sites were identified for on-ground interventions. This included two leaky weirs, a large contour and associated earthworks which were constructed over three days. The contour’s main role was to divert runoff from reaching a severely eroded gully.
Within a week of the on-ground works, heavy rain helped to fill the leaky weirs and water is now leaking slowly over the planned route. Grass seeds have been scattered over all the earthworks and revegetation is expected to begin covering the bare ground during spring and summer.
The largest leaky weir skilfully constructed by Shane Potocnic of Holbrook Earthmoving, with rock brought in from Bald Hill Quarry.
“Our thanks to all at the Mulloon Institute for such a successful first stage, we hope in the future to continue to do further works and also add much more revegetation to the site.” Jo Hoole, Slate Hill
Video - Below the lowest site is a trickle pipe that spills onto a rock ramp. Low flows go through the pipe. High flows travel down the rock ramp.