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.
South Australia has successfully lobbied the
Commonwealth and other Murray Basin states for a $4
million cash injection to keep the mouth of the
River Murray open over the summer months.
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
Raising the water levels in the Lock 1 and 2 weir
pools up to 0.2 m above the maximum normal operating
range (0.5 m above full supply level) commenced on
Wednesday 15 October 2014. The first phase, raising
the water levels 0.10 m above the maximum normal
operating range, will be complete on 18 October
2014. An assessment of the action will be undertaken
before raising the water levels an additional 0.10 m
(second phase) It is anticipated that the second
phase will commence on Monday, 27 October 2014.
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 inlet structure and
construct a vertical slot fishway is underway. 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.
Chowilla & Lock 6
Testing of the new environmental water management
infrastructure on the Chowilla Floodplain commenced
on 8 September 2014 and will continue until early
December 2014. Water levels have reached the target
heights of 19.10 m AHD at the Chowilla regulator
(raised by about 2.7 metres) and 19.65 m AHD at Lock
6, which is 0.40 m above normal pool level. These
water levels are being held until 29 October 2014 to
enable engineering checks and environmental
monitoring to be undertaken.
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.
WATER QUALITY – Blue-Green Algae
The New South Wales Government, through Sunraysia
Algal Coordinating Committee, has issued a red alert
warning for toxic blue-green algae on the Darling
River at Tapio, where water is unsuitable for
recreation, stock and domestic purposes.