Wingecarribee River - Crack Willow Project
- Category: Projects
- Created: Monday, 01 January 2007 17:25
- Published: Wednesday, 27 February 2013 17:25
- Written by Jeff Cottrell
- Hits: 1857
Willow Warriors are assisting local stakeholders the Wingecarribee Shire Council, Office of Water, South East Local Land Services, National Parks and Wildlife Service and Crown Lands to control invasive willows, including Crack Willows and Grey Sallow Willows, and Acer Negundo 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. We have also been connected with activities down to the Wollondilly Junction and where we have doen work downstream to the stored water and so now connected as one project covering 114 km of river. There are a few crack willows left where we could not get landowner consent and some where we have not yet asked and one 9km section of inaccessable gorge country between MacArthurs Crossing and Long Flat. There is also a large infestation of Acers (Maples) near Berrima which needs to be treated before it becomes a major investment to control
View Wingecarribee Crack Willow Control in a larger map
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 as there is too much work for volunteers and paddling the section is very dangerout due to fences and Grey sallow plants crossing the river forming strainersa nd sieves
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 we assited with in 2006-08 and then abandond because it was not possible to acheive any control of the infestation due to the size of the infestation upstream of the reserve.
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 2 Green Army teams in 2015-16 have done a lot of work removing willows and other weeds and planting native tubestock.
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 as there is too much work including the planting required for volunteers to do this project. However the Great Easter Ranges program is planning to do some control work and planting vegetation corridors along the river. It is however feasible for volunteers to do monitoring and followup treatment of crack willows between the infestation s and Berrima Weir
Berrima Weir to the Old Hume Highway Bridge.
Willows Warriors has assisted in this section in 2006-07 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. We last monitorined this section in August 2014
The Old Hume Highway Bridge to River Bend Reserve
There were many willows in this section of river with all the visible ones treated and removed in 2009-10. But there are still a num ber of bank and instream crack willows around the bend and so out of sight and out of mind, but producing material that spreads downstream.
River Bend Reserve to MacArthurs Crossing
Willow Warriors mapped 180 willows in this section in March 2007 and started treating them in March 2008. With landowner consent to date we treated most of the crack willows from the start of the rapids down to Mandemar creek and left about 15 crack willows between Mandemar creek and MacArthurs Crossing. Council than had contractors treat the crack willows arounf River Bend Reserve stopping at thestart of the rapids. The treatment finished in 2010 and then we started curtting up the willow debris to prevent it casuing log jams that would prevent the group monitoring the willow program along the river safely. however in 2012 and 2013 major floods washed the dead willo from around river bend reserve into the Wallaby rocks canyon making it impassible and so impracticle to run safe monitoring activities. We did try cutting som eof it up butvthere was too many logs. A trip in 2017 has confirmed the log jam has oved but still impeds the portage in the canyon.
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.
MacArthurs Crossing 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 in May 2008. 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.