CONSTRUCTION WORKS & OTHER ISSUES
Sandbars in the vicinity of the Murray Mouth may cause
navigation hazards. Mariners are advised to navigate
with caution when operating in the area.
Sandbars are also present along sections of the River
Murray in South
Australia and all watercraft users should be aware of,
and regularly check, the river depth.
Mannum & Morgan Waste Disposal
The Mannum River Vessel Waste Disposal Station is
out of commission until 16 April 2014. Temporary
pump-out facilities are available 500 metres
downstream of Mannum at the Unforgettable Houseboats
The Morgan River Vessel Waste Disposal Station will
be out of commission from 12 March until 28 March
2014. Temporary facilities will be available 1.5
kilometres downstream of Morgan at the Foxtale Hire
Remedial works at Lock 4 are scheduled to
commence early May 2014 and be completed around
early August 2014. During this period Lock 4 will be
closed to navigation.
Weir pool level changes at Lock 8
River Murray water users
and landholders are advised to take into account
changing water levels at Lock 8 weir pool over the
coming week, and make adjustments to their pumps as
8 weir pool will be gradually raised from the
current level of 0.5m below full supply level to
about 0.3m above full supply level.
The pool will then be lowered back to the
February target level of 0.5m below full supply
level by around 23 February 2014.
The pool is being
temporarily filled to help manage the delivery of
water to South Australia while water is unavailable
from Lake Victoria. Between 21 and 23 February, Lake
Victoria’s outlet will be closed to build a coffer
dam at the site, which will allow maintenance work
to be done on the outlet.
The changes to the Lock 8
weir pool this week are a short term variation to
the original program for the NSW Lock 8 weir trial
that began in August.
The table below outlines
the program for Lock 8 levels once they return to
0.5m below full supply level in late February. These
are indicative water levels only, and actual river
operations may result in slight variations to these
Adjustment relative to Full Supply Level (m)
Installation of mechanised gates at Lock 11 (Mildura
weir pool) is scheduled to commence in mid-late May
2014 and be completed in June 2014. The installation
is expected to take about three weeks. During this
period Lock 11 will be closed to navigation.
Remedial works in the Mullaroo Creek (located in
Victoria and flows into the Lindsay River, which
enters the River Murray between Lock 6 and 7) are
expected to commence in early March 2014 and be
completed around June 2014. The works are necessary
to improve the control of flows in this system. For
public safety reasons the Mullaroo Creek will be
closed to navigation at the work site during this
Riverine Wetlands Recovery Project
Mariners are advised that an Aquatic Activity
Licence has been issued to the Department of
Environment, Water and Natural Resources for works
to remove flow obstructions into Lake Carlet in the
Lower Murray and the construction of a regulator
near the entrance to Beldora wetland in the Upper
Murray where navigation will be prohibited within 50
metres of the works the area will marked with yellow
The project is expected to start after 31
January 2014 and completed before
30 June 2014.
Other works will be undertaken at
North Purnong, Kroehns Landing, Murbko South,
Merreti during this
period and mariners are advised to keep well clear
of these works.
All regulator sites after completion will be
marked with Blocked Channel markers. These markers
will have water depth indicators.
The Commonwealth Government has confirmed,
under the Environment Protection and Biodiversity
Conservation Act 1999 (Cwlth), that water-based works
to remove the Currency Creek Regulator are now
complete and the site has been returned as close as
practicable to pre-construction bathymetry. Disposal
of the stockpile of rock material that was removed
from the regulator has commenced.
The New South Wales Government (through Regional Algal
Coordinating Committees) has issued red alert warnings
for toxic blue-green algae at:
• Menindee Lakes and the Great Darling Anabranch at,
and upstream of, Tara Downs, where the water is
unsuitable for stock and domestic, irrigation and
• Griffith and Balranald on the Murrumbidgee River,
where the water is unsuitable for recreational and
stock watering purposes; and
• downstream of Barren Box Swamp on the Murrumbidgee
River, where the water is unsuitable for irrigation,
stock and domestic purpose.
Although these toxic blue-green algal blooms pose no
threat to South Australia at this stage, the
Murray-Darling Basin Authority and the relevant South
Australian Government agencies are regularly
monitoring the situation. It is not uncommon to
experience algal blooms at this time of the year.