South East Drainage Network South East Drainage Network How should - - PowerPoint PPT Presentation

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

• ur 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 /Scheme Date

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

• f 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.

End South East Drainage Network

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 1911-1925 Half construction costs borne by landholders Petition Drains 1908-1950 Cost borne by landholders Andersons Scheme 1950-1972 Landholder paid an annual betterment rate 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

Structure Funding required cost per year

Capital Replacement –all structures 3.184 Painting Steel Bridges 0.514 Periodic Maintenance – joints, spalling erosion, guard rail 0.499 Capital replacement – fencing 0.237 Total 4.434

SEWDCB assessment of funding for replacement and maintenance of drainage network assets

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)

• f $2.182 M

by Activity

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

Capital Funding - $432,860 = 0.25% on total structural asset value of $172 M

Item 2012/13 2013/14

Property Plant and Equipment Office refurbishment, equipment purchases Finalised Office Upgrade – carryover funds, insurance , replacement of ATV Bridge replacement 7 medium culverts replaced, 1 culvert crossing repaired 6 culvert crossings replaced 3 culvert crossings widened 1 pipe crossing installed Steel Girder Bridge Painting 8 steel girder bridges repainted Nil Bridge repairs DPTI contracted to repair 12 bridges Nil Weirs Retrofit or install 7 weirs, incl lay flat gate at Magarey’s Lane 1 weir installed 2 pip and flap valve weirs

Activities Achieved

Item 2012/13 2013/14

Drain channel spraying 109 drain channels sprayed 46 drain channels were sprayed mostly in the Southern district Noxious Weeds 8 drain reserves sprayed 8 drain reserves sprayed Helicopter spraying 13 major drains sprayed (approx. 300km) 1 drain reserve sprayed for noxious weed only Silt removal 24 drain sections incl sea

• utlets (approx. 89km)

9 drain sections including sea

• utlets

Slashing /track maintenance 16 drain track were slashed graded or maintained 4 short sections of drain were slashed

Recurrent Activities Achieved

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