South East Drainage Network
South East Drainage Network “How should we pay for maintaining our largest local infrastructure asset – the South East Drainage Network?” The State Government will commit $2.2m p.a. Do we want to spend more than that, and if so, how do we fairly share this cost across the region?
Why is future funding an important issue for our region ? The drainage network provides important: • Economic • Environmental • Social benefits for our region.
South East Pre - European Flows
A Brief History 1840s large pastoral runs established in South East region First drains -1862 in the lower South East Key reasons for initial drainage effort • Accessibility – transport • Increasing productive capacity of the land Enabled: • Crown land to be sold • Post war soldier settlement
Major Construction Period Date /Scheme Millicent -Tantanoola 1864-1883 National Drains 1883-1908 Scheme Act Drains 1911-1925 Petition Drains 1905-1950 Andersons Scheme 1950-1972 Upper South East 1997-2011 SE Flows Restoration 2014
South East Drainage Network today More than 2,500km of drains and floodways
Built Assets • 1,875 km drains in the lower South East • 714 km in the upper South East • Approx. 2,028 structures – 307 bridges – 1,480 culverts – 160 Regulators – 81 drop weirs
South Eastern Water Conservation and Drainage Board 1) Capital program 2) Drain Maintenance silt cleaning weed control reed cutting 3) Fencing 4) Regulator operation/flow management environmental & agricultural purposes 5) Policy Implement Private Works Licenses and Authorisations to take water from the drain 6) Responsibility for Management Agreements
Built Assets - Key to the transport network & regional economy Plant and Equipment - Business approach is via asset ownership
Drain maintenance - Important to maintain flow efficiency and functionality of the drainage network Flows Management - Important for managing wetland hydration flooding, and managing soil moisture
The drainage network provides important: • Economic • Environmental • Social benefits for our region.
South East Drainage Network End
Funding the Drainage Network Key content on the cost of maintaining the drainage network
Major Construction Phase Financed Millicent -Tantanoola 1864-1883 National Drains 1883-1908 Government Scheme Act Drains Half construction costs borne by landholders 1911-1925 Petition Drains 1908-1950 Cost borne by landholders Andersons Scheme Landholder paid an annual betterment rate 1950-1972 Upper South East 1997-2011 1) $ 6M landholders $9M State and $9M Commonwealth Govt 2) $11 M Landholders $19.15M State $19.15M Commonwealth Reflows NWI Australian Govt SE Flows Restoration 2014 $60 M jointly funded $54M Commonwealth $6M State
Since 1992 ongoing funding from State Government • 1992/1993 funding allocated $1.017 M • 2013/14 funding allocated $2.182M
South East Drainage Network The Asset Base Combined total assets worth $287.5 million Assessed Drain channel replacement value of $115.43 million Assessed Structures of the network replacement value of $172.07 million Accepted industry standard for capital replacement of structural assets is 3% per year – which would equate to $5.15 Million per annum
SEWDCB assessment of funding for replacement and maintenance of drainage network assets Structure Funding required cost per year Capital Replacement – all structures 3.184 Painting Steel Bridges 0.514 Periodic Maintenance – joints, spalling 0.499 erosion, guard rail Capital replacement – fencing 0.237 Total 4.434
South East Drainage Network Service life factors Physical material deterioration due to aging (eg loss of structural capacity) Poor performance – e g cost of maintenance becomes excessive Asset becomes functionally obsolete and inadequate to meet change in user demand (eg wider and heavier machinery)
South East Drainage Network Current Investment (13-14) of $2.182 M by Activity
Capital Funding - $432,860 = 0.25% on total structural asset value of $172 M Item Cost $ 2013/14 Activities Bridge Replacement 322,127 10 culvert crossings replaced/upgraded Flood Mitigation 24,082 Minor works West Avenue, 9.2km drain re-grading , 2 wetland inlets, 3 regulators Plant and Equipment 19,523 Insurance replacement of ATCV Other 67,130 Fencing , Office building upgrade from (committed carry-over funds) Total 432860
Activities Achieved Item 2012/13 2013/14 Property Plant Office refurbishment, Finalised Office Upgrade – and Equipment equipment purchases carryover funds, insurance , replacement of ATV Bridge 7 medium culverts 6 culvert crossings replaced replacement replaced, 1 culvert 3 culvert crossings widened crossing repaired 1 pipe crossing installed Steel Girder 8 steel girder bridges Nil Bridge Painting repainted Bridge repairs DPTI contracted to repair Nil 12 bridges Weirs Retrofit or install 7 weirs, 1 weir installed incl lay flat gate at 2 pip and flap valve weirs Magarey’s Lane
Recurrent Activities Achieved Item 2012/13 2013/14 Drain channel 109 drain channels 46 drain channels were spraying sprayed sprayed mostly in the Southern district Noxious Weeds 8 drain reserves sprayed 8 drain reserves sprayed Helicopter 13 major drains sprayed 1 drain reserve sprayed for spraying (approx. 300km) noxious weed only Silt removal 24 drain sections incl sea 9 drain sections including sea outlets (approx. 89km) outlets Slashing /track 16 drain track were 4 short sections of drain were maintenance slashed graded or slashed maintained
South East Drainage Network Management of the network supports the region Built assets …Bridges and structures… regional economy …connects people and communities Drain maintenance … agricultural productivity … deliver water to wetlands … Flow Management … environmental benefits … economic benefit
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