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, downstream of Lock 7 and 8 and in
South Australia. All watercraft users should be
aware of submerged navigation hazards, and should
regularly check the river depth.
Lock 1 & Lock 2 Pool Levels
The water levels in the Lock 1 and 2 weir pools have
been raised slightly but maintained within their
normal operating range (up to 0.3 m above full
supply level). It is anticipated that in early
October 2014, these weir pools will be raised, using
environmental water, up to 0.5 m above full supply
level, or 0.2 m above the maximum normal operating
range. The water levels will be raised in two
phases, up to 0.10 m above the maximum normal
operating range, then an assessment of the action
will be undertaken before raising the water levels
an additional 0.10 m. The rate of rise will be
approximately 0.02 m/day.
Work has commenced to relocate pump offtakes from
Yatco Lagoon. Work to install new pump offtakes on
the River Murray will commence in the coming months.
The construction work is expected to be completed by
There are reports of shallow water above Loxton
where care should be taken.
Deep Creek (Pike Floodplain)
Work to replace the Deep Creek regulating structure
and construction of a vertical slot fishway
commenced on 4 August 2014. On 11 August 2014, work
commenced to block-off Deep Creek from the River
Murray through the installation of a coffer dam.
Deep Creek flow will be maintained throughout the
construction period via a temporary diversion pipe.
Construction is expected to be completed by
mid-December 2014. Traffic conditions on the Lock 5
Road will be changed during this period.
have been expressed about the low levels at Settlers
Bend (below Lock 5). There is a 1.1m depth on the
exit of the bend coming upstream (during the
increased flow), in line with the Captains markers.
It is a tight turn and narrow passage. It seems some
are encouraging the commission to block the small
"by pass" channel upstream from the bend to direct
all the flow around Settlers.
The green markers
that follow around the bend are lacking in numbers
now, with one green 20 ltr drum forming the first of
the down stream markers. A large gap exists between
this and the next marker up stream and it appears
important to stay close to the bank all the way
along this area.
Testing of the new environmental water management
infrastructure on the Chowilla Floodplain commenced
on 8 September 2014 and will continue until early
December 2014. Testing will involve use of the
Chowilla Creek Environmental Regulator and ancillary
structures. The testing will involve progressively
raising the Lock 6 weir pool level up to a maximum
of 0.40 m above normal pool level over a period of
about eight weeks from late September through to
mid-November, reaching the target height of 19.65 m
AHD for about two weeks during mid-October.
Lake Victoria Outlet Regulator
Remedial works on the Lake Victoria Outlet Regulator
are underway and expected to be completed in late
August 2014. The works are necessary to improve the
structural integrity of the regulator.
Camping is not allowed in the area immediately
downstream of the regulator during the construction
period. There are alternate camping sites nearby,
along Rufus River.
Lock 8 & Lock 9 Pool Changes
The Lock 9 weir pool level is expected to
increase by up to 15cm above the full supply level
over spring, and the Lock 8 weir pool is expected to
increase by about 80cm above full supply level.
Over summer and autumn, the weir pools will be
lower than full supply level. Lock 9 is expected to
be drawn down to about 10cm below full supply level
and Lock 8 will be drawn down to about 60cm below
full supply level.
Both weir pools will be raised back gradually to
full supply level by winter 2015.
The New South Wales Government (through Regional
Algal Coordinating Committees) has a red alert warning
for toxic blue-green algae at Balranald on the
Murrumbidgee River, where water is unsuitable for
recreational and stock watering purposes