Sydney Harbour

Wingecarribee River - Crack Willow Project

Willow Warriors are assisting local stakeholders the Wingecarribee Shire Council, Sydney Catchment Authority, Hawkesbury Nepean CMA National Parks and Wildlife Service and Department of Lands to control invasive willows including Crack Willows and Grey Sallow Willows along the Wingecarribee River. The control of these two types of willows have been split into two projects as the issues, control techniques and future monitoring processes are substantially different.

Willow Warriors have mapped the willows along the river and are helping to control the willows in some sections of the river:
Wingecarribee Reservoir to Cecil Hoskins Reserve
Willow Warriors has paddled this section of river once but did not formally map the willows in this section. With the exception of one location where control work has been carried out by Wingecarribee Shire council there are only small number of large Crack willows along the river some follow-up is required where they have been treated. There are also a large number of Grey Sallow willows in this section of river. Willow Warriors is not carrying out any activities in this section of river currently
We do not have photos from the original mapping paddle.

Cecil Hoskins Reserve
As well as the significant Grey Sallow willow infestation in the nature reserve there are a few crack willows that should be treated when the primary treatment of the Grey Sallow willows is complete.

 See the Cecil Hoskins project page for photos of the Grey Sallow project.

Cecil Hoskins Reserve to Oxley College
Monitoring and follow-up of previous treatment is required in this section. Currently Willow Warriors is not working in this section of river but monitoring could be a future activity for Willow Warriors.

Oxley College to Berrima Weir
Around Oxley College the willows have been cleared but there is a very large infestation of Crack willows about 1km downstream of the College, which will require contractors to treat the willows and remove the willow debris. Willow Warriors are currently not undertaking any activities in this section.

Berrima Weir to the Old Hume Highway Bridge.
Willows Warriors has assisted in this section with following up a previous treatment program and extending the treatment up to the weir. The group is also working to remove the dead willow debris from the flood prone area in this section. There are still several large crack willows to be treated in this section, which can not be removed until other trees have been planted to replace them along the river bank.
Photos from the last treatment day on October can be seen here.

The Old Hume Highway Bridge to River Bend Reserve
There are many willows in this section of river and some of the local stakeholders are providing funding for contractors to treat and remove these willows.

River Bend Reserve to Mandemar Creek
Willow Warriors mapped 180 willows in this section in March 2007 and started treating them in March 2008. With landowner consent to date we have treated about two thirds of these although in July 2007 a significant flood pushed many of these willows over making them more difficult to treat and also tearing off a lot of branches to sprout along the river and increasing the number to treat. Once the willows have died the group will be removing the willow debris from the flood prone area where possible to allow monitoring activities to continue into the future.
Photos from the last trip on 1 November 2008 we treated the willows in the downstream end of the canyon and down to the Birchalls Lane exit can be seen here.

Mandemar Creek to Long Flat
A small group of local paddlers have paddled this section of river and did not see any willows. This section of river is extremely difficult to travel and canoeist have to focus on the paddling of the river so there may be one or two willows missed but they do not present a major risk to the project.
There are no photos available of this section

Long Flat to Joadja
The willows in this section have been mapped and where we have landowner consent they have been treated. The numbers of crack willows in this section are not significant
Photos from the mapping and treatment trip on … can be see here.

Joadja to the Wollondilly Junction
Rivers Canoe Club paddles this section of river frequently and has found two crack willows of which they have treated one.
Photos of this activity can be seen here.

View Wingecarribee Crack Willow Control in a larger map


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