Gawler 2012-13 Annual Report - page 172

Town of Gawler Annual Report 2012/13
Page 172
introduction • summary • strategic directions •
statutory information
• index
Gawler River Floodplain Management Authority
Achievements Against the Business Plan 2012
2015 for the period July 2012 to June 2013
For the previous achievements see the Annual Reports for the years ending June 2003 to 2012.
Gawler River Flood Mitigation Scheme
Mark Two
What will the Mark Two Scheme Include? (Note these steps may occur concurrently and not necessarily in the following
order)
One Reconfirm with the Constituent Councils that a 1 in 100 year level of protection is the protection standard that is
to be pursued in the development of the Gawler River Flood Mitigation Scheme - Mark Two Strategy.
Two Determine if a second dam on the North Para River is an option. The GRFMA Board is currently calling tenders
for a Findings Report to undertake an assessment to determine if a second dam is required and feasible.
Three The Gawler River Floodplain Mapping Model should be maintained as the reference tool to demonstrate the level
of flood protection and validity of design of land proposed for development as part of the approval process. To
achieve this, the model should be upgraded to include recent works such as the Northern Expressway works and
the additional floodplain mapping completed as part of the Light River Templers Creek Salt Creek Mapping Study
by the District Council of Mallala.
Four To further develop the preliminary assessment of possible local area levees prepared in the 2008 Gawler River
Floodplain Mapping Study at Gawler, Angle Vale and Two Wells and develop a levee strategy for Virginia to a
robust design standard with a staging plan. Undertake a cost benefit study for each stage of the plan.
Five Establish a protocol with the Floodplain Councils that where development of land in areas identified as ‘at risk of
flooding’ is planned to proceed by the implementation of a local area levee that mapping of the proposed levees
on the Gawler River Floodplain Mapping Study Model will be required.
Six
Maintain a working relationship with the Australian Rail Track Corporation to ensure that any changes to Rail
track infrastructure of culverts and rail heights are mapped on the Gawler River Floodplain Mapping Study Model
to identify any changes to flooding impacts.
Seven Develop a funding strategy for flood protection that is delivered by local area levees on the questions of who
should own and maintain the levees and whether local area levees are regional works that the GRFMA should
fund or are they local works that are the responsibility of the local Council.
Eight Investigate opportunities for funding partners and grants to undertake the necessary assessments and designs.
Nine The Scheme will also seek to clarify, through the Local Government Association, the policy and legal framework
around maintenance of rivers and creeks where those rivers and creeks are part of the regional flood
management plan. Under current legislation a landowner is responsible for the condition of a creek or waterway
on private land.
Part B: Maintenance of the Scheme
Performance Targets:
Timings:
To be measured By: Actual Achievements
Six monthly inspection
June and
December
Completion of
Inspection Report
Feb 2011
Dam Inspector inspection
Sep 2011
Dam Inspector inspection
Inspection following initial
filling of the Dam
Within one month
of event
Completion of
Inspection Report
1...,162,163,164,165,166,167,168,169,170,171 173,174,175
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