Flood Management Plan - Shire of Yarra Ranges

Flood Management PlanFor Shire of Yarra Ranges and Melbourne WaterMay 2011

DOCUMENT STATUSVersion Doc type Reviewed by Approved by Date issuedv01 Draft LJC CMB 13/12/2010v02 Draft LJC CMB Not issuedv03 Draft Final LJC CMB 01/03/2011v04 Draft Final LJC CMB 14/04/2011v05 Final LJC CMB 19/05/2011PROJECT DETAILSProject NameClientClient Project ManagerWater Technology Project ManagerReport AuthorsJob NumberReport NumberDocument NameYarra Ranges FMPMelbourne WaterNicole BiscanLuke CunninghamSEL/ADV/LJCJ1553R01YarraRanges FMP MelW J1553r01V05_Final.docxWater Technology Pty Ltd have produced this document in accordance with instructions from Melbourne Water and theShire of Yarra Ranges for their use only. The concepts and information contained in this document are the copyright ofWater Technology Pty Ltd. Use or copying of this document in whole or in part without written permission of WaterTechnology Pty Ltd constitutes an infringement of copyright.Water Technology Pty Ltd does not warrant this document is definitive nor free from error and does not accept liability forany loss caused, or arising from, reliance upon the information provided herein.15 Business Park DriveNotting Hill VIC 3168Telephone (03) 9558 9366Fax (03) 9558 9365ACN No. 093 377 283ABN No. 60 093 377 283ABN No. 60 093 377 2832 Melbourne Water Yarra Ranges Shire Council Flood Management Plan

Table of Contents1 Executive Summary 52 Background 83 Purpose 84 Objectives 95 Scope 96 The Municipality, its Waterways and Drainage 106.1 The Shire of Yarra Ranges 106.2 Waterways 116.3 The Drainage System 116.4 Flooding 156.5 Study Area Features and Historical Flood Issues 186.6 Historical Flood Event Reporting 346.7 Available Flood Data, Information and Intelligence – The Existing KnowledgeBase 347 Flood Risk 417.1 Assessing Flood Risk 417.2 Existing Flood Risks within the Municipality 457.3 Future Flood Risks – Long-Term Future Pressures on Existing DrainageSystems 458 Flood Management and Mitigation 488.1 Drainage Strategy 488.2 Flood Modelling and Mapping - Completing the Knowledge Base 488.3 Flood Emergency Response Planning 528.4 Municipal Emergency Management Plan (MEMP) and Flood Emergency Plan528.5 Planning Controls 538.6 Asset Management 538.7 Drainage Improvement Capital Works 538.8 Flood Emergency Response Planning 548.9 Individual Flood Preparedness Plans 548.10 Community Education and Awareness 548.11 Flood Warning System 558.12 Flood Proofing 568.13 Drainage Studies and Design Guidelines 569 Roles and Responsibilities 579.1 Roles and Responsibilities 57Yarra Ranges Shire Council Flood Management Plan Melbourne Water 3

9.2 Improved Collaboration 6010 Improvement Plan 6110.1 Action Plan 6211 Monitoring and Review 6611.1 Document control 6612 How this document was developed 6713 ABBREVIATIONS & ACRONYMS 6813.1 GLOSSARY 69APPENDIX A – ASSET LIST 70APPENDIX B – ROLES AND RESPONSIBILITIES 79APPENDIX C - FLOOD RISK ASSESSMENT 81APPENDIX D – FARM DAMS IN THE SHIRE OF YARRA RANGES 83APPENDIX E – MELWAYS MAPS SHOWING 100 YEAR FLOOD EXTENT 854 Melbourne Water Yarra Ranges Shire Council Flood Management Plan

1 Executive SummaryThis Shire of Yarra Ranges Flood Management Plan has been prepared byWater Technology for the Shire of Yarra Ranges and Melbourne Water, withinput from Victoria State Emergency Service (VICSES). It has been jointlydeveloped in response to an identified need to improve collaboration betweenflood management agencies. The objective is to work at a local level toimplement the objectives of Melbourne Water’s Port Phillip and WesternportRegion Flood Management and Drainage Strategy. The Port Phillip andWesternport Region Flood Management and Drainage Strategy (MW, 2007)committed Melbourne Water to work with each Municipality within the regionto produce a detailed local Flood Management Plan. This document is theresult of delivery on that commitment for the Shire of Yarra Ranges. WaterTechnology was commissioned by Melbourne Water to prepare this document.The Flood Management Plan outlines roles and responsibilities and describes,at a high level, the Shire of Yarra Ranges and Melbourne Water’s key floodmanagement planning and management activities. It details the flood risks forthe Municipality, particularly identifying any ‘hot spot’ or problem areas. ThePlan identifies a series of actions to improve flood management in the Shire ofYarra Ranges over the next five years.The purpose of this plan is to clearly define the knowledge gaps betweenorganisations, such that over time this document will become a critical asset inboth the understanding of flood behaviour within the catchment, and themanagement of those risks.Response and recovery arrangements for floods and other emergencies aredetailed in the Shire of Yarra Ranges Municipal Emergency Management Plan(MEMP) and the Flood Emergency Plan to be compiled by the VICSES.Information collected with development of this Flood Management Plan willinform preparation of a Flood Emergency Plan with VICSES, as a sub-plan ofthe Municipal Emergency Management Plan.The recognised responsibilities define the starting point for any organisationsrole within the emergency management of any threat. The following tableYarra Ranges Shire Council Flood Management Plan Melbourne Water 5

outlines both the Shire of Yarra Ranges, and Melbourne Water’s roles andobligations with respect to flooding.Melbourne Water is the Regional Drainage and Floodplain ManagementAuthority for the Port Phillip and Westernport Region. Consequently,Melbourne Water is responsible for the provision and maintenance of maindrains, the management of stormwater overflows from its drainage systemand inundation from rivers and creeks within the Yarra Ranges Shire.Responsibility for managing local stormwater and flooding issues rests withCouncils; however this has not been explicitly defined by Government. Theoperational and authoritative roles of Councils are absent from the Water Actand the Planning and Environment Act.The Local Government Act, 1989, prescribes the function of council is toprovide and maintain community infrastructure. All sub 60 hectare drainageand local roads (commonly major overland flow paths) are generally theresponsibility of Council. As such Council are involved in the maintenance,development, and design of flood conveyance measures. Changes need to bemade to the legislation with councils being provided with legislative powers forthese responsibilities.Legislative responsibilities for a range of relevant areas are shown below.• Floodplain Manager – Melbourne Water• Asset Managers – Melbourne Water and Council (traditionallycatchments greater than 60ha are Melbourne Water’sresponsibility however this may not always be the case)• Planning Authority – Council• Emergency Management – VICSES• Community Flood Education – VICSESFigure 1 displays primary and secondary responsibilities of agencies involvedin flood management. The blue boxes indicate the agency with the leadresponsibility.6 Melbourne Water Yarra Ranges Shire Council Flood Management Plan

Figure 1Flood Management Roles and Responsibilities TableState LegislatureState TreasuryDSEMelbourne WaterLocal CouncilVICSESBureau of MeteorologyDepartment Justice / Vic PoliceDepartment Human ServicesDPCDBuilding CommissionOther institutions and thecommunityAddress legal /institutional gapsAnalyse and mapflood risksPublish flood riskdetailsProvide floodintelligence dataImplementdevelopmentcontrolsEducation andawarenessContingencyplanningFlood warnings andalertsEmergencyresponseSmart urbanrenewal√ √ √√ √ √ √ √√ √ √ √ √√ √ √ √ √ √√ √ √ √ √√ √ √ √ √ √√ √ √ √ √ √ √ √√ √ √ √ √ √ √ √√ √ √ √ √ √ √√ √ √ √ √ √Runoff reduction √ √ √ √ √Rural levee reform √ √ √Yarra Ranges Shire Council Flood Management Plan Melbourne Water 7

2 BackgroundThe Shire of Yarra Ranges is located at the northern end of the ‘Port Phillipand Westernport Region’. The region has been earmarked as a highly floodprone area subject to a number of drainage challenges.The Port Phillip and Westernport Region Flood Management and DrainageStrategy (Melbourne Water, 2007), prepared by Melbourne Water inconsultation with government departments, councils, emergency serviceorganisations and other agencies, recognises that no single organisation andno single approach can deliver an effective response to flood managementissues. A coordinated and collaborative approach by flood managers andcommunities is required.The five key objectives of the Strategy are:• Objective 1: Completing the knowledge base (flood mapping andunderstanding social impacts)• Objective 2: Potential long term future pressures on existing drainagesystems (development in established areas and climate change)• Objective 3: An agreed approach to managing existing regional floodproblems (understanding intolerable flood risks)• Objective 4: Enhanced community education, flood awareness andpreparation• Objective 5: Agreed responsibilities and improved collaboration betweenflood management agencies (integrated framework and floodmanagement plans)One of the key outcomes from the strategy was the commitment fromMelbourne Water to work with each Municipality within the region to produce adetailed local Flood Management Plan. This document is the result of deliveryon that commitment for the Shire of Yarra Ranges.3 PurposeThis Flood Management Plan (FMP) is aimed at assisting Melbourne Water andthe Shire of Yarra Ranges to undertake their flood managementresponsibilities ensuring that suitable measures have been (or are being)implemented where possible to manage the existing risks associated withflooding. It is aimed at ensuring the objectives of the Port Phillip andWesternport Region Flood Management and Drainage Strategy can beeffectively implemented in the Shire of Yarra Ranges in a coordinated andeffective manner at a local level, within an integrated flood managementframework. It is also aimed at fostering preparedness for flood events and an8 Melbourne Water Shire of Yarra Ranges Flood Management Plan

ability to respond in an informed and appropriate manner within the Shire ofYarra Ranges and its communities. It provides some background informationor ‘intelligence’ for the creation/review of Council’s Flood Emergency Plan.While the FMP has due regard for current flood related legislation andsupporting policies and strategies, it recognises that no single organisationand no single approach can deliver an effective response to flood managementissues. It also recognises that it is not possible to make the Shire of YarraRanges completely free from flooding. A residual risk will remain.4 ObjectivesThe objectives in developing and maintaining this Flood Management Plan areto:• improve the understanding of flood waters within the Shire of YarraRanges with the aim of informing the development of a FloodEmergency Plan• clarify roles and responsibilities of stakeholders in addressing existingflood risks• set out an improvement plan with regard to flood management activities• facilitate coordination and cooperation in the implementation of the fivekey objectives outlined in the Strategy with particular attention toexisting flood risks• ensure that drainage and flood management matters within themunicipality are effectively managed and coordinated through floodmanagement agency collaboration and partnership.5 ScopeWhile management of, and preparedness for, floods arising from waterwaysand drainage systems involves many different agencies, this FMP is largelyaimed at outlining key activities, roles and responsibilities for Melbourne Waterand the Shire of Yarra Ranges within a total system framework that recognisestheir joint responsibility for the management and ownership of the drainagesystem.This Plan does not set out emergency procedures, active flood event roles orrisk management procedures. It is intended to be a guiding document,informing risk management documents with respect to flood management andto be used alongside the Municipal Emergency Management Plan and the FloodEmergency Plan.Melbourne Water Shire of Yarra Ranges Flood Management Plan 9

6 The Municipality, its Waterways and Drainage6.1 The Shire of Yarra RangesThe Yarra Ranges Municipal area is located in the outer eastern and northeasternsuburbs of Melbourne. It extends into the Yarra Valley and DandenongRanges, covering a total area of 2,470 km2. The Yarra Ranges Shire is thelargest in area of all the local government areas in Melbourne, with a diversemix of urban and rural areas. The Shire is made up of nine wards and has apopulation of 140,217 people, based on the 2006 census.European settlement first began in the Yarra Ranges region during the early1830’s. This land has in the past been occupied by the traditional Bunnurrongand Wawurrong people. The Yarra Ranges Shire was formed in 1994,combining the former Healesville, Lilydale, Sherbrooke and Upper Yarraregions.Yarra Ranges Shire Council is currently formed by nine wards:- Billanook Ward;- Chandler Ward;- Chirnside Ward;- Lyster Ward;- Melba Ward;- O’Shannassy Ward;- Ryrie Ward;- Streeton Ward; and,- Walling Ward.Locations of each of the Shire’s wards are shown below in Figure 2.10 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Figure 2Shire of Yarra Ranges ward boundaries6.2 WaterwaysThe main waterway running through the Shire of Yarra Ranges is the YarraRiver. The upper reaches of the Yarra River run through the Shire and theriver itself begins in the Yarra Ranges National Park.Figure 3 shows the upstream section of the Yarra River within the Shire,including major tributaries such as the Don River, Grace Burn, Woori YallockCreek, Stringybark Creek, Steels Creek, Dixons Creek and the Little YarraRiver. Appendix A lists and maps all waterways within the Shire.6.3 The Drainage SystemAround 11% of properties within the Shire of Yarra Ranges are geographicallyflood prone, based on flood mapping completed to date. Major contributors tothis are developments within floodplains and overland flow paths, old drainagesystems designed to the then standards of the day that didn’t have formaloverland flow paths or increased housing density.Drainage of land within the Shire of Yarra Ranges is through a number ofdifferent flow paths, for definition within this report various definitions ofdrainage terms are shown in Section 13.Melbourne Water Shire of Yarra Ranges Flood Management Plan 11

Settlement in Yarra Ranges Shire began in the mid 19th century through thegrowth of several small townships in gold discovery areas in the northern andeastern areas of the Shire. 19th century industry within the Shire includedforestry and livestock grazing with orchards and nurseries thriving on theShire’s rich soils in the late 19th century. The completion of railway lines toLilydale and Belgrave contributed to steady growth in the Shire, predominantlyin the post-war years. The 1970’s and 1980’s saw the most rapid growthwithin the Shire, particularly in the western areas of the Shire near the urbanfringe of Melbourne. Growth in these areas since the 1970’s has seen thepopulation of the Shire steadily increase. As a result of the haphazarddevelopment since the mid 1800’s until today, many older areas within theMunicipality contain drainage infrastructure which does not meet today’sstandards.The existing Shire of Yarra Ranges managed drainage network is over708.5km in total length. The location and details of each drain and associatedinfrastructure are available in Council’s well maintained GIS database.There are over 1,900 km of Melbourne Water managed waterways within theShire, 58km of open channels and 40km of underground drainage. Thelocation and details associated with these assets are available from MelbourneWater’s GIS and Asset Management System. All Melbourne Water and Shiredrainage infrastructure is shown in Figure 4.12 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Figure 3Main waterways within the Shire of Yarra RangesMelbourne Water Shire of Yarra Ranges Flood Management Plan 13

Figure 4Drainage Assets within the Shire of Yarra Ranges14 Melbourne Water Shire of Yarra Ranges Flood Management Plan

6.4 FloodingFor the purposes of this report flooding will be defined as any water conveyedoutside of its natural, constructed, or defined waterway. This includes thedrainage pipe network, and defined waterways. Under this definition alloverland flow paths, including many Council roadways are included as floodways.This section describes the mapped 100 year Average RecurrenceInterval (ARI).The extent of the 100 year ARI flood event in the Shire of Yarra Ranges isshown in Figure 5. The flood extent has been determined through previousflood mapping projects undertaken by Melbourne Water. Those areas likely tobe impacted by flooding have been designated Land Subject to Inundation(LSIO) Overlay and Special Building Overlay (SBO) overlays. Flooding in theShire is mainly confined to the section of the Yarra River located downstreamof View Street. There are currently 6,043 properties (mostly residential)identified within the defined 100 year flood extent. Properties within thedefined 100 year flood extent have a portion of or all of the propertyinundated by floodwater and is irrespective of water depth or floor level.Prior to the construction of the Upper Yarra Dam, major floods were recordedalong the Yarra River in 1891, 1904, and 1923, with the worst floods recordedin 1934. The peak inundation extent from the 1934 flood is used to currentlydefine the Yarra River’s floodplain bounds. Since the 1934 flood, the UpperYarra Dam was constructed, as the dam is not a flood protection structure, thelikelihood of similar inundation cannot be dismissed. Minor flooding in YarraGlen and along the Watts River occurs on an almost annual basis. Landslipsare also a potential hazard in the Dandenong’s during heavy rainfall periods.In terms of property inundation, unconfined flooding is a greater hazard thanconfined flooding. Water that is unconfined will likely run into properties androads situated at low lying points. Confined flooding areas are usuallydesignated flood overlay zones, with building floor levels raised for protection.In terms of safety risks however, velocities are generally higher through theconfined flood channels. Property inundation flooding within the Shire rangesfrom minor nuisance flooding through to major flooding with water levelsexceeding floor levels.Most of the areas flood mapped within the Shire of Yarra Ranges have beencompleted for the Melbourne network only (>60ha catchments). The numberof properties within the flood extent is expected to be higher once theproperties subject to inundation in smaller catchments (managed by theShire) are identified. The existing 100 year ARI flood extent is shown in Figure5 and demonstrates that a significant portion of the Shire has not been floodmapped.Melbourne Water Shire of Yarra Ranges Flood Management Plan 15

All existing flood information provided in this document is based solely onMelbourne Water flood mapping information completed to date.16 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Figure 5100 Year Flood Extent, Shire of Yarra RangesMelbourne Water Shire of Yarra Ranges Flood Management Plan 17

6.5 Study Area Features and Historical Flood IssuesThe Shire of Yarra Ranges thriving local economy is supported by the food andwine industry and the tourism industry both of which are dependent onhealthy rainfall totals and healthy waterways.The following points are of note:• The main water feature through the study area is the Yarra River whichoutfalls to the west and continues on through Greater Melbourne untilultimately discharging to Port Philip Bay.• Apart from the Yarra River, other main drains and waterways subject toflooding in the 100 year ARI event (of those waterways which are floodmapped) include the Little Yarra River, Watts River, Olinda Creek,Cherry Hill Drain, Chirnside Park Drain, Bushy Creek Lower, MonbulkCreek, Ferny Creek and Eumemmerring Creek.• Land use in the Yarra Ranges Shire is a mixture of urban, rural andNational Park areasDue to the size of the Shire of Yarra Ranges, this Flood Management Plan isbroken down into seven separate study areas as shown in Figure 6.The seven study areas are based on the existing drainage lines and are asfollows:• Yarra River Mainstream Study Area• Woori Yallock Creek Study Area• Cardinia Creek Study Area• Upper Dandenong Creek Study Area• Olinda Creek Study Area• Watts River Study Area• Steels Creek Study Area18 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Figure 6Study Areas within the Shire of Yarra RangesMelbourne Water Shire of Yarra Ranges Flood Management Plan 19

6.5.1 Yarra River Mainstream Study AreaThe Yarra River Mainstream Study Area covers an area of 1,238km 2 , and islocated through the centre of the Shire of Yarra Ranges. Figure 7 shows theStudy Area, with the waterways and drains shown. Major points include thefollowing:• The Yarra River is the major waterway for the Shire, which flows fromthe north-east of the study area to the western boundary. A number oftributaries flow into the Yarra River.• The Don River is a major tributary to the Upper Yarra River• The Yarra River originates within the municipality and flows throughMelbourne before entering Port Phillip Bay.• The majority of the upper catchment is protected forest.• The Upper Yarra Reservoir (200,000 ML) is located 24km east ofWarburton.• The Yarra River Mainstream Study Area is either forested or urban witha significant proportion not connected to Council drainage. Townshipssuch as Warburton, Healesville, Woori Yallock and Chirnside Park haveYarra Ranges drainage.• Major drains managed and maintained by Melbourne Water in the StudyArea include:oooChirnside Main Drain, Paynes Road Drain and Cherry Hill Drain(Chirnside Park)Yarra Glen Main Drain (Yarra Glen)Woori Yallock Main Drain Diversion (Woori Yallock)• In the vicinity of Yering, Melbourne Water is responsible for theLilyponds Creek open channels.20 Melbourne Water Shire of Yarra Ranges Flood Management Plan

YarraRiver TribDonRiverYarra RiverBig PatsCreekArmstrongCreekMcMahonsCreekBakerCreekFigure 7Yarra River Mainstream Study Area - Main Drains and WaterwaysFlooding within the Yarra River Mainstream Study Area is shown below inFigure 8. Yarra River flooding occurs from Warburton, intensifying in thedownstream reaches, particularly at the Little Yarra River junction. Floodingfrom underground drainage has not been mapped in the Study Area.Melbourne Water Shire of Yarra Ranges Flood Management Plan 21

Upper YarraReservoirYarra RiverToorongoChirnsideParkWarburtonLittle Yarra RiverJunctionFigure 8Yarra River Mainstream Study Area - 100 year ARI Flooding6.5.2 Woori Yallock Creek Study AreaThe Woori Yallock Creek Study Area is located along the southern boundary ofthe Shire of Yarra Ranges. Covering an area of 559 km2, the major riversinclude Little Yarra River, Cockatoo Creek and Woori Yallock Creek (Figure 9).Major points include the following:• The upper reaches of the Little Yarra River are protected forest;however the majority of the river flows through rural landscapes. LittleYarra River intersects the Yarra River at Yarra Junction.• The Woori Yallock Creek catchment is mostly rural, flowing from theDandenongs to the Yarra River.• Only a few minor underground drains are owned by Melbourne Water inthe study area. Council drainage occurs in major townships within thestudy area.22 Melbourne Water Shire of Yarra Ranges Flood Management Plan

WooriYallockCreekHoddlesCreekSlatyCreekMcCraeCreekLittle YarraRiverFigure 9Woori Yallock Creek Study Area – Main Drains and WaterwaysRiver flooding within the Woori Yallock Creek Study Area occurs at thefollowing locations:• Little Yarra River from Powelltown to Yarra Junction• Wandin Yallock Creek, through Seville• Woori Yallock Creek in Woori Yallock and YellingboFigure 10 displays the location of the flooding. No flooding from undergrounddrains has been mapped in the sub area.Melbourne Water Shire of Yarra Ranges Flood Management Plan 23

SevilleWooriYallockYarraJunctionOlindaWooriYallockCreekLittle YarraRiverMonbulkFigure 10Woori Yallock Creek Study Area - 100 year ARI Flooding6.5.3 Cardinia Creek Study AreaThe Cardinia Creek Catchment is a small catchment (139km 2 ) located on thesouthern side of the Shire of Yarra Ranges, adjacent to Woori Yallock andUpper Dandenong Creek Study Areas. Cardinia Reservoir is the easternboundary of the study area. The catchment is partially rural and urban. Thedrain and waterway layout within the study area is shown in Figure 11. Majorpoints include the following:• Muddy Creek flows from Selby to Narre Warren East over a distance of6.82km.• Muddy Creek is not part of the Yarra catchment as it flows south toCardinia Creek.• Council drainage only is found within the Cardinia Creek Study Area (NoMW drainage).24 Melbourne Water Shire of Yarra Ranges Flood Management Plan

MuddyCreekFigure 11Cardinia Creek Study Area – Main Drains and WaterwaysThere are no flood overlays for the Cardinia Creek Study Area for overland orunderground drains (refer Figure 12).Melbourne Water Shire of Yarra Ranges Flood Management Plan 25

SelbyBelgraveSouthMuddyCreekNarreWarrenEastFigure 12Cardinia Creek Study Area - 100 year ARI Flooding6.5.4 Upper Dandenong Creek Study AreaThe Upper Dandenong Creek Study Area is located along the south-westernboundary of the Shire of Yarra Ranges. Covering an area of 199km 2 , thecatchment contains Sherbrook Forest and urban areas. Major creeks withinthe catchment include Monbulk Creek, Ferny Creek, Dandenong Creek,Bungalook Creek and Eumemmerring Creek (Figure 13). Major points includethe following:• The southern portion of the Upper Dandenong Creek Study Area drainsto Dandenong Creek. Eumemmerring Creek starts in the study areaand connects to Hallam Main Drain. Monbulk Creek connects toCorhanwarrabul Creek then Dandenong Creek further upstream atRowville.• Melbourne Water has undertaken numerous stream bank stabilisationworks and willow removal works have been conducted on MonbulkCreek and Ferny Creek.• Dandenong Creek headwaters are in the northern portion of the studyarea. The upper catchment is forested.26 Melbourne Water Shire of Yarra Ranges Flood Management Plan

• Bungalook Creek is located in the northern portion of the study area. Aretarding basin is located on Bungalook Creek at Fussell Road.• Melbourne Water manages and maintains the Mask Creek Catchmentdrain and other drains within Upwey. A majority of the MelbourneWater drainage is located in Kilsyth to help alleviate flooding issues.BungalookCreekDandenongCreekFernyCreekMonbulkCreekClematisCreekHardysCreekEumemmerringCreekFigure 13Upper Dandenong Creek Study Area – Main Drains and WaterwaysFlooding within the Upper Dandenong Creek Study Area is shown below inFigure 14. 100 Year ARI flooding has been defined for:• The lower reaches of Monbulk Creek• A majority of Ferny Creek through Upwey• Eumemmerring CreekFlooding from underground drainage has been mapped for Bungalook Creekdownstream of the Fussell Road retarding basing and sheet floodingthroughout Kilsyth West.Melbourne Water Shire of Yarra Ranges Flood Management Plan 27

KilsythBungalookCreekMtDandenongUpweyMonbulkCreekEumemmerringCreekFigure 14Upper Dandenong Creek Study Area - 100 year ARI Flooding6.5.5 Olinda Creek Study AreaThe Olinda Creek Study Area is located along the western boundary of theShire of Yarra Ranges. The study area is 195km 2 and contains major creekssuch as Olinda Creek, Stringybark Creek and Brushy Creek (Figure 15). Majorpoints include the following:• Olinda Creek originates in the Dandenong Ranges and flows north tothe Yarra River. Lilydale Lake is located on Olinda Creek also.• Brushy Creek starts in urban Mooroolbark and heads north through amostly urban catchment.• Silvan Reservoir is located within the south-eastern corner of theStudy Area.• Significant drainage infrastructure, both Council and Melbourne Waterassets, are located with the urban areas of Mooroolbark and Croydon.28 Melbourne Water Shire of Yarra Ranges Flood Management Plan

OlindaCreekLilydaleEastDrainLogCreekStringybarkCreekBrushyCreekLyrebird GullyCreekFigure 15Olinda Creek Study Area – Main Drains and WaterwaysOlinda Creek floods in a 100 Year event from Mt Evelyn to the Yarra Riverjunction. Flooding intensifies downstream of Lilydale (Figure 16). Hydraulicmodelling of the Creek is currently being undertaken by Melbourne Water(2010). Brushy Creek has a defined 100 Year flood extent downstream ofMooroolbark.Flood studies on the Melbourne Water drains in Mooroolbark show significantflooding for most Brushy Creek drains. A number of mitigation works arecurrently being conducted to alleviate the flooding in the Mooroolbark andCroydon areas.Melbourne Water Shire of Yarra Ranges Flood Management Plan 29

ColdstreamStringybarkCreekBrushyCreekMooroolbarkMt EvelynOlindaCreekFigure 16Olinda Creek Study Area - 100 year ARI Flooding6.5.6 Watts River Study AreaThe Watts River Study Area is located along the northern boundary of theShire of Yarra Ranges. The study area is 269km 2 and contains majorwaterways such as Watts River, Grace Burn and Coranderrk Creek (Figure 17).Major points include the following:• Watts River originates in the Maroondah Reservoir protected forestarea, flowing into Maroondah Reservoir upstream of Healesville. It thencontinues through Healesville to the Yarra River.• The headwaters of Grace Burn and Coranderrk Creek are also in theforested water supply catchment.• New Chum Creek, Myers Creek and Donnelly Creek flow into WattsRivers just upstream of Healesville.• Council and Melbourne Water drainage systems are located withinHealesville and Badger Creek.30 Melbourne Water Shire of Yarra Ranges Flood Management Plan

NewChumCreekMyersCreekDonnellyCreekWatts RiverMaroondahReservoirGraceburnCreekCoranderrkCreekFigure 17Watts River Study Area – Main Drains and Waterways100 Year ARI flood extents for overland and pipe flooding are shown in Figure18. Watts River downstream of Maroondah Highway experiences floodingwhich impacts the township of Healesville. Minor flooding in Badger Creek is aresult of Corranderrk and Picaninny Creeks. No flooding due to undergrounddrains has been identified.Melbourne Water Shire of Yarra Ranges Flood Management Plan 31

ChumCreekFernshawHealesvilleBadgerCreekFigure 18Watts River Study Area - 100 year ARI Flooding6.5.7 Steels Creek Study AreaThe Steels Creek Study Area is located on the north-western boundary of theShire of Yarra Ranges. The study area is 128km 2 and contains majorwaterways such as Steels Creek, Dixon Creek and Pauls Creek (Figure 19).Major points include the following:• Steels Creek originates just north of the Steels Creek township, andflows south through Yarra Glen to the Yarra River.• Dixons Creek merges with Steels Creek upstream of Yarra Glen.• Pauls Creek flows southwards and directly enters the Yarra River atTarrawarra Road.• Council drainage is only found within Yarra Glen for the Steels CreekCatchment. 1,045m of a Pauls Creek Tributary is a Melbourne Waterdrainage asset.32 Melbourne Water Shire of Yarra Ranges Flood Management Plan

SteelsCreekDixonCreekPaulsCreekFigure 19Steels Creek Study Area – Main Drains and WaterwaysNo underground drainage flood extents have been defined for the 100 YearARI event in the Steels Creek Study Area. Overland flooding has been definedin Yarra Glen and Tarrawarra as a result of Yarra River flooding.Melbourne Water Shire of Yarra Ranges Flood Management Plan 33

DixonsCreekYarraGlenTarrawarraFigure 20Steels Creek Study Area - 100 year ARI Flooding6.6 Historical Flood Event ReportingMelbourne Water have flood levels from past flood events within the YarraRanges municipal boundary.The 1984 flood event is one such event with a comprehensive set of floodlevels from the September flood event. Flood levels were achieved through thepegging of flood debris lines along main waterways such as Badger Creek,Grace Burn, Hoddles Creek, the Little Yarra River, Picaninny Creek, SteelsCreek, Stringybark Creek, Watts River, Woori Yallock Creek, and the YarraRiver main stream. This data is available from Melbourne Water.6.7 Available Flood Data, Information and Intelligence – TheExisting Knowledge BaseThe Shire of Yarra Ranges holds data on the resident complaints,investigations by the Drainage and Assets team and various Engineeringstudies undertaken. Records have been kept by the Shire from 1995 topresent and are stored in databases. The data recorded can provide usefulinformation regarding the locations of drainage issues. In addition to theinformation provided by the Shire, the SES and Melbourne Water have alsoprovided useful information to identify potential drainage issue areas.34 Melbourne Water Shire of Yarra Ranges Flood Management Plan

6.7.1 Drainage & Assets Investigations – Shire of Yarra RangesThe Drainage and Assets team has investigated 11,673 assets within the Shireof Yarra Ranges. The spatial locations of the studies are shown in Figure 21.Over 500 studies have been completed within each of the suburbs of Belgrave,Healesville, Lilydale, Montrose, Mooroolbark, Mt Evelyn and Upwey.Figure 21Drainage & Assets Investigations – Shire of Yarra RangesFor each investigation the request type is noted. Figure 22 shows the numberof each type of request, where the predominant requests are for road drainage– Blocked Pits (32%) and Table Drains (24%). 11% of investigations are forprivate property or easements. For all of the sites with over 500 studies, amajority of the studies are in relation to blocked pits, with the exception ofHealesville. Figure 23 shows the number of studies completed per 100residents for the top 10 suburbs. Sherbrooke recorded 21.2 investigations per100 residents throughout this period. Population data, supplied by the Shire ofYarra Ranges, is from the 2006 Census.Melbourne Water Shire of Yarra Ranges Flood Management Plan 35

Figure 22Drainage & Assets Investigations - Request TypesFigure 23 Drainage & Assets Investigation per 100 residents – top 10 suburbs6.7.2 Customer Complaints – Shire of Yarra Ranges2,287 drainage related customer complaints have been received within theShire of Yarra Ranges post 1995. The spatial location of these complaints isshown in Figure 24. 10% of all complaints were in Healesville, 9% in MtEvelyn and 9% in Lilydale.36 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Figure 24Customer Complaints – Shire of Yarra RangesFigure 25 below shows the number of drainage related complaints received bythe Shire per 100 residents for the top 10 suburbs. Wesburn had the mostcomplaints (32 from 870 residents) at 3.7 complaints per 100 residents.Population data, supplied by the Shire of Yarra Ranges, is from the 2006Census.Melbourne Water Shire of Yarra Ranges Flood Management Plan 37

Figure 25Drainage complaints per 100 residents – top 10 suburbs6.7.3 Engineering Studies – Shire of Yarra RangesIn addition to the Drainage and Assets team, the Engineering team haveconducted 2,254 studies post 1995. A majority of these studies are located inOlinda, Mt Evelyn, Lilydale and Healesville (Figure 26).38 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Figure 26Engineering Studies – Shire of Yarra RangesPredominantly the Engineering Studies fall into two categories, MiscellaneousRoad Drainage (31%) and Water Run Off (27%) (Figure 27). Studies such asOutfall Drainage, Underground Drainage and Cross Road Culvert studies areless common. Figure 28 shows the number of engineering studies completedper 100 residents in the top 10 suburbs. This shows that Olinda has had themost engineering studies per head of population with 15.4 studies per 100people. Population data, supplied by the Shire of Yarra Ranges, is from the2006 Census.Melbourne Water Shire of Yarra Ranges Flood Management Plan 39

Figure 27Engineering Studies – Study TypesFigure 28Engineering studies per 100 residents – top 10 suburbs6.7.4 Local Knowledge – SES Local CrewsThere are three SES Units within the Yarra Ranges Council municipalityincluding Lilydale, Healesville and Upper Yarra. Council also supports the40 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Emerald SES unit which is located outside the Council’s boundary but doeshave areas of management within the municipality.7 Flood Risk7.1 Assessing Flood RiskMelbourne Water uses a Flood Risk Assessment Framework (Melbourne Water,2010) to identify and assess flood risks, based on a triple bottom lineapproach, where catchments are ranked based on the factors below:• Economic;• Safety;• Social; and,• Community PreparednessThe Framework was developed in consultation with Councils and otherstakeholders to provide a more transparent process to help people understandthe decision making and flood mitigation prioritisation process.The Flood Risk Assessment Framework classifies flood risks, by catchment, aslow, medium, high or extreme. Extreme flood risks are those considered to be‘intolerable’. While flooding is a natural occurrence, in some cases the risksfrom flooding may be considered intolerable – therefore measures should beput in place to reduce the risks. For extreme risk catchments a range ofcontrol measures, embracing both engineering works and non-structuralapproaches, will be considered with the aim of reducing the risk to a moretolerable level. In most cases the risk will be reduced but not removed: aresidual risk will remain.Table 1 below summarises the results from the Melbourne Water Flood RiskMatrix. Of the 59 catchments, 3 catchments were ranked as ‘high risk’, YarraRiver, Little Yarra River and Brushy Creek Upper. No catchments were rankedas an ‘extreme risk’.The current list of flood risks, by catchment, within Shire of Yarra Ranges isprovided in Table 1 and is also show graphically in Figure 29.Melbourne Water Shire of Yarra Ranges Flood Management Plan 41

Table 1Shire of Yarra Ranges - Catchment flood risk rating from Melbourne Water FloodRisk MatrixCatchment NameCatchmentNumberRisk ScoreBRUSHY CREEK (UPPER) 5560 HighYARRA RIVER 5800 HighLITTLE YARRA RIVER 5810 HighBLACKWOOD CREEK 5027 MediumCUMBERLAND CREEK 5207 MediumBELLELL CREEK 5438 MediumCHIRNSIDE PARK DRAIN 5602 MediumCHERRY HILL DRAIN 5608 MediumOLINDA CREEK 5610 MediumSTRINGYBARK CREEK 5620 MediumSTEELS CREEK 5640 MediumDIXONS CREEK 5643 MediumTRIB OF YARRA RIVER 5658 MediumPAUL CREEK 5660 MediumTRIB OF YARRA RIVER 5664 MediumTRIB OF YARRA RIVER 5666 MediumWATTS RIVER 5670 MediumPICANINNY CREEK 5671 MediumGRACE BURN CREEK 5678 MediumNEW CHUM CREEK 5683 MediumMYERS CREEK 5686 MediumDONNELLY CREEK 5689 MediumYARRA RIVER 5700 MediumCORANDERRK CREEK 5710 MediumTRIB OF YARRA RIVER 5715 MediumWOORI YALLOCK CREEK 5720 MediumWANDIN YALLOCK CREEK 5723 MediumSHEEP STATION CREEK 5734 MediumCOCKATOO CREEK 5740 MediumMCCRAE CREEK 5741 MediumURE CREEK 5774 MediumHODDLES CREEK 5780 MediumDON RIVER 5790 MediumTRIB OF YARRA RIVER 5792 MediumTRIB OF YARRA RIVER 5797 MediumBRITANNIA CREEK 5813 MediumSLATY CREEK 5819 MediumBLACK SAND CREEK 5822 MediumHACKETT CREEK 5823 MediumSAXTON CREEK 5824 MediumLEARMONTH CREEK 5825 MediumMACKLEY CREEK 5828 Medium42 Melbourne Water Shire of Yarra Ranges Flood Management Plan

BIG PATS CREEK 5840 MediumMISSISSIPPI CREEK 5843 MediumCEMENT CREEK 5855 MediumO'SHANNASSY RIVER 5860 MediumO'SHANNASSY RIVERWEST BRANCH5864 MediumDEEP CREEK 5867 MediumSTARVATION CREEK 5870 MediumMCMAHONS CREEK 5880 MediumARMSTRONG CREEK 5890 MediumARMSTRONG CREEK EASTBRANCH5893 MediumYARRA RIVER 5900 MediumWALSH CREEK 5910 MediumCLEAR CREEK 5920 MediumALDERMANS CREEK 5930 MediumFEHRING CREEK 6087 MediumEUMEMMERRING CREEKUPPER0504 MediumHEATHERTON ROAD EASTDRAIN0517 MediumMelbourne Water Shire of Yarra Ranges Flood Management Plan 43

Figure 29Flood Risk within the Shire of Yarra Ranges (from Melbourne Water Flood Matrix)44 Melbourne Water Shire of Yarra Ranges Flood Management Plan

7.2 Existing Flood Risks within the MunicipalityFlood modelling undertaken by Melbourne Water to date has identifiedapproximately 6,043 properties within the Shire of Yarra Ranges that areaffected 1 by 100 year ARI flooding from waterways and overland flows.Many of the high flood risk areas are associated with flooding are from majorwaterways. The drainage system both Council’s and Melbourne Water’s isbuilt to national standards and for most storm events does a good job.Stormwater systems today are generally designed to cater for a 1-in 5 yearARI and when an event beyond this occurs the overflow will follow the naturalvalleys of the land either along reserved floodplains, channels and roads. Insome suburbs in the municipality unfortunately this overflow can be throughexisting developed properties.Many suburbs were developed in a similar era where the undergrounddrainage network was constructed without consideration of overland flowpaths for when runoff from severe storms exceeds the capacity of theunderground drainage system.7.3 Future Flood Risks – Long-Term Future Pressures on ExistingDrainage Systems7.3.1 Greenfields Development and Urban ExpansionConsistent drainage design following ‘Australian Rainfall and Runoff’ (Council’sfavoured drainage design guidelines) and Melbourne Water’s ‘LandDevelopment Manual’ along with planning and building provisions within theShire of Yarra Ranges Planning Scheme will ensure that future developmentwithin the Municipality is designed and constructed to current drainagestandards that adequately provide new drainage infrastructure that suitablymanages the flood risk.Figure 30 shows the Urban Growth Boundary (UGB) within the Shire of YarraRanges and the land areas that have been included in the UGB since 2005.The UGB defines areas where urban growth will be encouraged within YarraRanges, clearly showing land that is designated urban, to be used for housing,industry and commerce, from that which is non-urban.All land within the UGB can expect urban growth leading to the year 2030 inline with the Victorian Governments ‘Melbourne 2030’ policy. If not properlymanaged, development in these areas has the potential to impact the qualityof drainage service currently provided by Melbourne Water and Council. It is1Affected properties refers to properties where inundation occurs in the 100 year ARI event, regardless of whether it is abovefloor flooding or not.Melbourne Water Shire of Yarra Ranges Flood Management Plan 45

acknowledged that land outside of the current UGB, and land recentlyincorporated into the UGB will be subject to growth as they are incorporated.As these areas are subject to contemporary drainage standards andprocedures it is expected that no additional unconfined flooding will beexperienced once developed.Rezoning of land use zones within the boundary is also possible, independentof whether the boundary is amended. Rezoning within the urban growthboundary (e.g. Industrial 1 zone to Industrial 2 zone) has a greater potentialto increase flood risks. This provides a much greater risk to the existingdrainage system as increased flows may not be accounted for in the traditionalreferral process. It is suggested that Melbourne Water works with the Shire ofYarra Ranges to identify possible infill areas, and set in place works to accountfor these changes.Figure 30 Urban Growth Boundary within the Shire of Yarra Ranges (DSE, 2010)46 Melbourne Water Shire of Yarra Ranges Flood Management Plan

7.3.2 Urban Consolidation and Infill DevelopmentThe population in Yarra Ranges has risen from 144,848 people in 2006 to147,328 residents in 2010 2 . An increase in population levels in developedareas has led to more infill development in Yarra Ranges. It is predicted thatby 2031 the estimated population in Yarra Ranges will have risen to 163,604people due in part to the urban growth boundary expansion 3 .Urban consolidation within a catchment can lead to an increase in the totalfraction imperviousness of a catchment to a level greater than what wascatered for in the original network design. The increase in impervious areawithin a catchment leads to greater stormwater runoff.7.3.3 Climate ChangeIt is generally accepted that human induced climate change is real and notsimply part of the natural climate cycle. It has the potential to increase floodrisk within the Port Phillip and Westernport region. While the latestpredictions are for a long-term reduction in storage yield (i.e. a reduction inrunoff volumes) it is likely that the intensity of extreme rainfall events willincrease. The change in rainfall patterns is likely to lead to less frequent (butpossibly larger) riverine floods and more frequent flash flooding and overlandflow events associated with localised storm activity (this is soon to beaddressed in the latest revision of ARR). At the same time, sea levels areexpected to rise resulting in additional flooding pressures in coastal areas.Due to the high elevations in the Shire of Yarra Ranges there is no threat ofproperty inundation from sea level rise. Rainfall intensity increases arehowever likely to impact on all of Yarra Ranges’ drainage system and on thecreeks and rivers within the Municipality. Melbourne Water adopts the methodof applying a 32% increase in rainfall intensity 4 to the catchment whenstudying the impacts of Climate Change. The implications of this increase inrainfall intensity are generally seen through an increase in flood extents,depths and velocities throughout a catchment. It is recommended that anyfuture flood mapping or drainage works within the Shire of Yarra Rangesassess the impacts of Climate Change on drainage service. It is suggested thatflood mapping follow the guidelines set out by Melbourne Water Technicalspecifications (2009).2Yarra Ranges Council Population Forecasts, http://forecast2.id.com.au/Default.aspx?id=125&pg=5210 Accessed October20104As per the Flood Mapping and Mitigation Teams “Technical Specifications and Requirements for Flood Mapping andRedevelopment Services Scheme Investigations” document, 2009.Melbourne Water Shire of Yarra Ranges Flood Management Plan 47

7.3.4 Priority Areas for Future Flood MappingThe current Water Plan commits Melbourne Water to reduceextreme/intolerable flooding within it’s area by 10% by 2013. As nocatchments within the Yarra Ranges municipality are currently considered tobe at extreme risk, there are no priority areas for future flood mapping basedon flood risk. Flood mapping is currently occurring and planned within themunicipality as detailed in Section 8.2.2.8 Flood Management and MitigationThis section captures works within the Municipality to manage flood risks aswell as what is planned to further improve the management of existing andfuture flood risks.8.1 Drainage StrategyCouncil’s drainage strategy includes renewal works, new works, maintenanceand improvements within a 20 year time frame. This forms a critical part ofCouncils Civil Infrastructure Asset Management Plan. As part of this study aninvestigation into the drainage network has been undertaken and somepreliminary mapping of possible areas requiring attention has been formed.This information has been passed on to the Shire of Yarra Ranges for furtherevaluation.8.2 Flood Modelling and Mapping - Completing the KnowledgeBaseAccurate survey and modelling of floodplains and overland flow paths isrequired to determine flood depths and delineate areas subject to inundationon floodplains and along overland flow paths. This information is aimed atimproving community safety through informed planning (ensuring that newdevelopment is designed to take into account floodplain and overland flowpaths and associated flow depths to ensure no worsening) and emergencyresponse. The mapped information is therefore required not only byMelbourne Water as the floodplain management authority, but also bymunicipal planning departments, emergency response organisations, otherinfrastructure providers, land developers, prospective land purchasers andexisting land owners and occupiers.Melbourne Water’s survey and modelling work for rivers, creeks and maindrains usually generates flood levels and extents for multiple AEP events up tothe 1% AEP (100-year ARI) flood. The 1% AEP event is considered adequatefor managing flood risk and associated issues relating to propertydevelopment and flood mitigation. However, when it comes to generating48 Melbourne Water Shire of Yarra Ranges Flood Management Plan

information to support Flood Emergency Planning there is a case forconsidering events up to the probable maximum flood (PMF). This isparticularly important in areas where the level of the PMF could besubstantially higher than the 1% AEP flood level and thus have significantimplications for municipal and regional emergency response planning.8.2.1 Mapping Completed in the MunicipalityMelbourne Water has completed flood mapping in some of the catchmentsthroughout the Shire of Yarra Ranges (over Melbourne Water assets only).Melbourne Water’s current mapping program investigates a range of ARIdurations (5, 10, 20, 50, 100 and PMP events), while older mapping projectsonly consider the 100 year ARI and perhaps the 50 and 20 year ARIs. Figure31 below shows the number of catchments within the Shire of Yarra Rangesthat have had flood mapping completed. Currently 63% of catchments havenot been mapped. 5% of catchments have both the 20 and 50 year ARI eventsmapped and 37% of catchments have the 100 year ARI mapped. Currentlythere are no catchments within the Shire of Yarra Ranges that have the 5year, 10 year or PMP events mapped. Table 2 details the flood mappingprojects completed within the Shire of Yarra Ranges’ catchments.40Number Catchments Mapped353025201510505 Year ARI 10 YearARI20 YearARI50 YearARI100 YearARIPMFNotMappedFigure 31Number of catchments with flood mapping projects completedTable 2Shire of Yarra Ranges – Flood Mapped CatchmentsCatchment Name 5 Year ARI 10 Year ARI 20 Year ARI 50 Year ARI 100 Year ARI PMFBLACKWOOD CREEK No No No No No NoCUMBERLAND CREEK No No No No No NoBELLELL CREEK No No No No No NoBRUSHY CREEK (UPPER) No No Yes Yes Yes NoCHIRNSIDE PARK DRAIN No No No No Yes NoCHERRY HILL DRAIN No No No No Yes NoMelbourne Water Shire of Yarra Ranges Flood Management Plan 49

OLINDA CREEK No No No No Yes NoSTRINGYBARK CREEK No No No No Yes NoSTEELS CREEK No No No No Yes NoDIXONS CREEK No No No No No NoTRIB OF YARRA RIVER No No No No No NoPAUL CREEK No No No No Yes NoTRIB OF YARRA RIVER No No No No Yes NoTRIB OF YARRA RIVER No No No No Yes NoWATTS RIVER No No No No Yes NoPICANINNY CREEK No No No No Yes NoGRACE BURN CREEK No No No No Yes NoNEW CHUM CREEK No No No No Yes NoMYERS CREEK No No No No No NoDONNELLY CREEK No No No No No NoYARRA RIVER No No No No Yes NoCORANDERRK CREEK No No No No Yes NoTRIB OF YARRA RIVER No No No No Yes NoWOORI YALLOCK CREEK No No No No Yes NoWANDIN YALLOCK CREEK No No No No Yes NoSHEEP STATION CREEK No No No No No NoCOCKATOO CREEK No No No No No NoMCCRAE CREEK No No No No No NoURE CREEK No No No No No NoHODDLES CREEK No No No No No NoDON RIVER No No No No No NoTRIB OF YARRA RIVER No No No No Yes NoTRIB OF YARRA RIVER No No No No Yes NoYARRA RIVER No No Yes Yes Yes NoLITTLE YARRA RIVER No No Yes Yes Yes NoBRITANNIA CREEK No No No No No NoSLATY CREEK No No No No No NoBLACK SAND CREEK No No No No No NoHACKETT CREEK No No No No No NoSAXTON CREEK No No No No No NoLEARMONTH CREEK No No No No No NoMACKLEY CREEK No No No No No NoBIG PATS CREEK No No No No No NoMISSISSIPPI CREEK No No No No No NoCEMENT CREEK No No No No No NoO'SHANNASSY RIVER No No No No No NoO'SHANNASSY RIVER WESTBRANCHNo No No No No NoDEEP CREEK No No No No No NoSTARVATION CREEK No No No No No NoMCMAHONS CREEK No No No No No NoARMSTRONG CREEK No No No No No NoARMSTRONG CREEK EASTBRANCHNo No No No No NoYARRA RIVER No No No No No NoWALSH CREEK No No No No No NoCLEAR CREEK No No No No No NoALDERMANS CREEK No No No No No NoFEHRING CREEK No No No No No NoEUMEMMERRING CREEKUPPERNo No No No No NoHEATHERTON ROAD EASTDRAINNo No No No No No50 Melbourne Water Shire of Yarra Ranges Flood Management Plan

The extents for the 1% AEP event have been incorporated into the Shire ofYarra Ranges Planning Scheme as a Land Subject to Inundation Overlay(LSIO) across the floodplains of the creeks and as a Special Building Overlay(SBO) along the overflow paths of main drains.The existing flood overlays are constantly subject to change. Melbourne Wateris responsible for maintaining and updating the various flood overlays for theareas greater than 60 ha. The LSIO and SBO may change for various reasons:• Over time, as more of the municipality is mapped the flood extents willincrease.• As more advanced methods of modelling and/or mapping aredeveloped, the flood extents may change.• New flood areas may be introduced as Yarra Ranges continues todevelop and further flood investigations are undertaken.• Furthermore, an LSIO overlay may be reclassified as an SBO overlay if adrainage system is installed through the flood prone area, generally toserve a new development.Such investigations require an update of the existing SBO and LSIO in theplanning schemes (planning scheme amendment). Additional propertiesaffected by the new flood extent need to be included under either an LSIO orSBO overlay.Melbourne Water has also surveyed many of the floor levels within the floodmapped catchments to categorise the building floor levels that are subject toinundation. Recently, Melbourne Water and the DSE in collaboration withmany of the local Councils have completed a LiDAR survey of MelbourneWater’s area of responsibility which included the Shire.Melbourne Water’s pipe and pit GIS information shows invert levels, pipesizes, pit types and pit invert levels in all locations and is generally wellbacked up by ‘as constructed’ plans of all assets. Yarra Ranges’ pipe and pitGIS information shows the size of the asset and maintenance responsibility inall locations as well as the length, inverts and grades. Together, the availableasset information is considered to be complete and suitable for use in anyfuture mapping projects.8.2.2 Proposed Mapping ProgramFuture flood mapping to be completed by Melbourne Water is based on anumber of factors including the presence of existing mapping, the quality ofexisting mapping and the safety risks of potential flooding. Currently, the LittleYarra from the confluence with the Yarra River through to Blackwood Creek isMelbourne Water Shire of Yarra Ranges Flood Management Plan 51

proposed to be mapped by Melbourne Water in 2011. Upon completion of floodmapping, the flood risk will be determined and actioned accordingly.Olinda Creek, which was previously mapped, is currently being remapped. Thefinal mapping is due for completion in 2011. If either of these mappingprojects results in an extreme risk, they may be incorporated into the nextWater Plan for investigation and possible mitigation.8.3 Flood Emergency Response PlanningPlanning is crucial to ensuring an effective proactive emergencyresponse to flooding when it occurs, and must be based on a soundunderstanding of flood risk. It is important to ensure that planning isconducted within the legislated Emergency Management framework asoutlined in the Emergency Management Manual Victoria (EMMV) as well ashaving a process that is established, outlines role and responsibilitiesof stakeholder agencies and is well understood by all stakeholders.Communication and consultation are essential in achieving ownership offlood emergency plans by all stakeholders. Ownership of flood emergencyplans ensures that stakeholders are more likely to respond to floods inaccordance with strategies and arrangements detailed in the plan and theEMMV. Community education also plays a significant role in ensuringthat individuals are well prepared to respond to and recover from floodemergencies.8.4 Municipal Emergency Management Plan (MEMP) and FloodEmergency PlanThe Municipal Emergency Management Plan (MEMP) for the Shire of YarraRanges reviewed and endorsed by the Shire in July 2010. The MEMP isprepared in accordance with Section 20 (1) of the Emergency Management Act1986.The main function of the MEMP is to detail and agree on a set of arrangementsfor the prevention, preparation, response and recovery from a broad range ofemergencies that could potentially impact the Shire.The VIC SES is the lead agency in responding to flood emergencies and willprovide guidance, advice and direction to support agencies such as the Shireof Yarra Ranges when planning for and responding to flood events. The VICSES are in the process of implementing a Regional Flood Emergency Planwhich, together with the State Flood Emergency Plan, will facilitate aconsistent and coordinated approach to flood response within the municipalityin the lead up to, during and after a flood event.In developing this Flood Management Plan, Melbourne Water and the Shire ofYarra Ranges have collated a range of information relating to flooding from52 Melbourne Water Shire of Yarra Ranges Flood Management Plan

waterways and overland flows within the Municipality. All informationand intelligence developed and collated as part of this Flood ManagementPlan and as a result of the studies and work that flow from its implementationwill be made available to the VIC SES for inclusion in the Flood EmergencyPlan and State Flood Emergency Plan. Information will also be available forthe MERO (Municipal Emergency Response Officer) for consideration andincorporation into the MEMP.Similarly, during and immediately after a flood it is important that keyaspects of the event are recorded so that the Flood Management Plan andits associated actions can be improved and future flood damage bettercontained. Arrangements for data collection and collation are detailedin the MEMP.The information collected and intelligence extracted needs to be used toinform this Flood Management Plan.8.5 Planning ControlsMelbourne Water is the Regional Drainage Authority and delegated FloodManagement Agency for the Port Phillip and Westernport region. Thus allapplications for subdivision and developments on flood prone land are referredby Shire of Yarra Ranges, as the authority responsible for the administrationof the Shire of Yarra Ranges Planning Scheme, to Melbourne Water underSection 55 of the Planning and Environment Act, 1987.A Land Subject to Inundation overlay (LSIO) applies across the floodplains ofthe main waterways within the Municipality. A Special Building Overlay (SBO)has also been applied to all the overland flow paths associated with MelbourneWater’s main drains within the Municipality.8.6 Asset ManagementCouncil maintains an Asset Management Plan that is continually in a state ofreview as items are added and removed. Assets are included on the plan whenmaintenance works or replacement is required. Asset works completed on apriority basis. Assets are added to the plan via resident complaints and reportsand requests from the Shire’s maintenance crews.8.7 Drainage Improvement Capital WorksDrainage improvements in the capital works program are sourced fromcompleted Drainage and Assets investigations. Items needing capital worksare ranked based on a set of criteria to assess the severity of flood risk orinconvenience. Works are completed on a priority basis.The current capital works program spans the period from 2010-11 to 2019-20Melbourne Water Shire of Yarra Ranges Flood Management Plan 53

8.7.1 Major Council Drainage System Upgrades and Related ProjectsThere have been no recent major upgrades to the council drainage network.Many drainage works occur throughout the Shire as part of new developmentworks.8.7.2 Melbourne Water Main Drain UpgradesMelbourne Water are responsible for the mapping and planning controls withinflood prone areas and where necessary to reduce extreme risks, may considerupgrading Melbourne Water assets to reduce the flood risk.A recent project in the municipality by Melbourne Water is in the Brushy Creekcatchment. This project cost $2.8M providing 100 year flood protection. Itwas completed over two stages. The first was extending and raising leveebanks the second involved removing a low flow underground pipe betweenBellara Drive and Maroondah Highway, creating in channel pools for additionalflood capacity, storage and waterway reconnection. Also created was a largerentry pit into the existing culverts at Maroondah Highway which improvedentry conditions and allowed for greater volume of flow passage (from 5m 3 /sec to 12 m 3 /sec)8.8 Flood Emergency Response PlanningFlood response and recovery arrangement are outlined in the Shire of YarraRanges Municipal Emergency Management Plan (MEMP). In a flood emergencyevent, the Shire takes guidance from the VIC SES with respect to floodresponse and planning and receives and shares advice with BOM, MelbourneWater and emergency response teams (Vic Police, CFA).The AIIMS-based Incident Management Team (IMT) will ensure that there is aseamless transition from response to recovery.8.9 Individual Flood Preparedness PlansSome businesses located in Warburton have individual flood preparednessplans as a result of planning requirements from Melbourne Water. Other thanthis, both Melbourne Water and the Shire of Yarra Ranges have no records ofother individual flood preparedness plans being prepared within themunicipality.8.10 Community Education and AwarenessThe Shire of Yarra Ranges, Melbourne Water and VICSES are committed toworking together before, in the lead up to, and during periods of flooding, tocreate awareness within the community of preparedness measures that have54 Melbourne Water Shire of Yarra Ranges Flood Management Plan

een and should be taken. This includes working to ensure that communitymembers:• Are aware of the flood threat in their area and the level at which theirproperty might be inundated;• Understand that works within an overland flow path or on a floodplainwill have some impact on flood behaviours and the need to ensure thatsuch works do not create additional flood problems elsewhere;• Have access to material about how to protect themselves and theirproperty against flood (e.g. personal flood planning);• Know how to find out the location of evacuation centres (it is noted thatVic Police request the opening of relief centres and council will decidethe most appropriate location based on the circumstances at the time.);and,• Are aware of the importance of advising Police when they make theirown decisions to evacuate.Council also recognises the need to work to ensure that residents, businessowners / operators and visitors are aware of the flood risk and of appropriateflood response actions.Currently there is no Community Flood Education, Awareness andPreparedness plan in the Shire of Yarra Ranges. It is recommended that a planis developed by VICSES in coordination with the Shire, Melbourne Water, andany other relevant stakeholders.The incorporation of flooding zones and overlays into the planning schemeraises community awareness of flooding issues. The notification of theamendment, along with the inclusion of flood maps as overlay controls, makesflooding information readily accessible to the community and ensures that siteconstraints and likely development requirements are flagged to developersand property owners. Planning information, including flooding overlays, isdisclosed to prospective purchasers through planning certificates issued underSection 199 of the Planning and Environment Act, 1987 and included as acompulsory part of the vendor’s statement issued under Section 32 of the Saleof Land Act, 1962.8.11 Flood Warning SystemOfficial flood warnings are given to the public via the Bureau of Meteorology(BOM) through various media outlets. Melbourne Water provides BOM withadvice on flood warning of which BOM bases their official flood warning.Melbourne Water operates alarmed stream monitoring stations on Yarra River(number of sites), Little Yarra River, Woori Yallock Creek, O’Shannassy River,Melbourne Water Shire of Yarra Ranges Flood Management Plan 55

Graceburn Creek, Watts River, Olinda Creek and Brushy Creek. There are alsovarious rain gauges scattered through some catchments.Roadside flood depth gauges exist in many locations throughout the Shirealthough the locations of each are not known. The Shire has plans to continueto install roadside depth gauges throughout the catchment.8.12 Flood ProofingThe Shire of Yarra Ranges are not aware of any properties which have beenprivately flood proofed. Melbourne Water has indicated that some rural landowners along the Yarra may have built levee walls to protect their propertiesfrom frequent nuisance flooding. Melbourne Water do not have records of thelocations or designs of these levee walls.Council have also indicated that there is a Melbourne Water constructed leveebank in Millgrove behind residential properties on Ronald Grove.8.13 Drainage Studies and Design Guidelines8.13.1 Guidelines for Development in Flood prone AreasMelbourne Water has developed guidelines to assist property owners,developers, designers and builders to understand the broad principles andspecific requirements that apply to property development in flood-prone areaswithin the Melbourne metropolitan area. The guidelines address requirementsin both floodplain and overland flow path areas and supplement the LandDevelopment Manual (Melbourne Water, 2010).8.13.2 Drainage SchemesThere are three active drainage schemes operated by Melbourne Water withinthe Yarra Ranges municipal boundary, Old Joes Creek Drainage Scheme (DS),Blind Creek DS and Upper Bungalook Creek DS. Each of these schemeboundaries intersect the municipal boundary in their upper catchment areas.Melbourne Water has planned works within the Bungalook Creek DS, thesmallest in area of the three schemes. In addition to the active schemes, thereare a number of closed Drainage Schemes within the municipal boundaryincluding Upper Old Joes Creek DS, Upper Dandenong Creek DS and KilsythMain Drain DS which were predominantly introduced in the 1970’s whenpopulation growth in the municipality was peaking. Melbourne Water arecurrently managing the collection of various developer contributions within theYarra Ranges municipality which are paid on a council basis for storm waterquality offsets for new developments and subdivisions.There are no existing or completed Redevelopment Services Schemes (RSS)within the municipal boundary. RSSs collect contributions from developers indeveloped areas from infill (typically smaller subdivisions) development to56 Melbourne Water Shire of Yarra Ranges Flood Management Plan

fund the required drainage upgrades due to increases in impervious areawithin the catchment. Melbourne Water has placed the RSS program on holdand is currently awaiting a review. It is unlikely that the RSS program willbegin again until the next Water Plan period beginning in 2013.9 Roles and Responsibilities9.1 Roles and ResponsibilitiesMelbourne Water is responsible for the installation and maintenance ofdrainage systems, including drain capacity and flood mitigation works, forcatchments greater than 60ha. Shire of Yarra Ranges is responsible for theinstallation and maintenance of drainage systems for catchments less than 60ha.Flood management in the context of waterways and drainage systems iscomplex and includes elements of prevention, preparedness, response andrecovery. The tools used to reduce existing and future flood risk and manageresidual flood risk comprise a variety of structural and non-structuralmeasures: engineering works to improve flood protection, land use and otherplanning controls, flood warning systems, programs of education, responseand recovery, etc. No single agency or stakeholder is able to deliver on allthese measures. Collaboration between agencies is essential for thedevelopment of coordinated and integrated flood management programs andactivities. A clear understanding and common agreement on respective rolesand responsibilities is essential to effective collaboration, particularly betweenMelbourne Water, Councils and VICSES. A summary of key stakeholder rolesand responsibilities is provided at Appendix B. A more detailed description ofthese for Melbourne Water and Councils is provided below.It is part of Melbourne Water’s mandate to ensure that within the Port Phillipand Westernport region, regional flooding issues, arising from both waterwaysand overland flows, are managed in an integrated manner. This requires thatthe upstream and downstream effects of flood management and drainagemeasures are addressed, including their impacts on waterways andenvironmental values. More particularly, Melbourne Water’s role is to:• Develop, oversee and where appropriate implement regional floodmanagement and drainage strategies which integrate local floodmanagement issues and prioritise the development of floodplainmanagement plans;• Support and assist Local Government in the implementation offloodplain management plans in order to reduce the future growth offlood risk and flood damages;Melbourne Water Shire of Yarra Ranges Flood Management Plan 57

• Implement structural and non-structural flood mitigation schemes toalleviate flooding in existing developed areas;• Install and maintain drainage systems including associated floodmitigation and emergency works for catchments greater than 60ha aswell as for trunk main drains and for the main waterways;• For main drainage systems and for the main waterways, prepare floodmapping for overland flow paths;• Provide input to Municipal Planning Schemes in order to facilitate theimplementation of land use planning measures to reduce the futuregrowth of flood risk and flood damages, respond to planning referrals,provide flood advice and assist in the resolution of planning issues (i.e.act as the formal referral authority);• Support and facilitate the implementation of flood warning systemsincluding the provision of a flood forecast and warning system for mainwaterways within the region;• Maintain and enhance flood information and coordinate the monitoringof significant flood events;• Support Local Government and VICSES in the delivery of enhancedcommunity flood education, awareness and preparedness across theregion; and• Advise Government on regional flood management priorities.Councils deliver on a wide spectrum of objectives and functions in relation toflood management. Historically, they have had operational responsibility formost flood management activities occurring within their boundaries.Specifically for sub 60 ha catchments Council’s role includes:• The establishment of a Planning Scheme as the principal means ofsetting out objectives, policies and controls for the fair, orderly,economic and sustainable use, development and protection of land 5 (thestatutory land use planning function);• Preparation of ‘designated special area’ maps for areas liable toflooding;• The setting of minimum floor levels for buildings in areas liable toflooding;• Management of local stormwater drainage systems;5 This includes the incorporation of flood provisions into the Planning Scheme in order to controldevelopment and works on floodplain land.58 Melbourne Water Shire of Yarra Ranges Flood Management Plan

• To regulate or prohibit any use or development in hazardous areas or inareas which are likely to become hazardous;• To protect public utilities and other assets;• The provision of services for local emergency and safety planning, landuse, building control, environmental control, protection andconservation;• Implement and maintain local flood warning systems;• Preparation and maintenance of a Municipal Emergency ManagementPlan (MEMP);• To coordinate municipal resources in accordance with the MEMP inrelation to prevention, response and recovery from flood emergencies;and• Maintenance and enhancement of local flood information including themonitoring of significant local flood events.In the context of the Port Phillip and Westernport Region Flood Managementand Drainage Strategy and this Flood Management Plan, the above leads tothe following expectations:That Melbourne Water will:1. Provide Councils with technical and financial assistance in thepreparation and maintenance of a Flood Management Plan (thisdocument) that identifies existing flood risks, identifies intolerable risksand prioritises works and activities aimed at reducing that risk andimproving regional flood management;2. Assist in the funding and management of prioritised works and activitiesidentified in the Flood Management Plan and in their implementation (asrequired) at regional level;3. Provide financial and technical support to Councils and VICSES in orderto enhanced community flood education, awareness and preparednessacross the region;4. Continue to support Councils in land use management and otheractivities aimed at reducing existing and future flood risk and damages;and5. Provide Council with the results of studies and analysis as well as datagathered during and after flood events for inclusion in the Shire of YarraRanges Flood Emergency Plan (MEMP Flood Emergency Plan).That Shire of Yarra Ranges will:Melbourne Water Shire of Yarra Ranges Flood Management Plan 59

1. With technical and financial assistance from Melbourne Water, assist inthe preparation and maintain a Flood Management Plan (this document)that identifies existing flood risks, identifies intolerable risks andprioritises works and activities aimed at reducing that risk andimproving regional flood management;2. Assist in facilitating the delivery of prioritised works and activitiesidentified in the Flood Management Plan and in their implementation (asrequired) within the Municipality with due regard for inter-municipalityissue;3. Incorporate flood mapping outputs into the Planning Scheme asappropriate zones and overlays and ensure that the flood provisions aresufficient and consistent with assessed risk and the aim of reducingexisting and future flood risk and damages;4. Support VICSES in the delivery of programs aimed at enhancingcommunity flood education, awareness and preparedness across theMunicipality; and5. Maintain the Flood Emergency Plan (MEMP Flood Emergency Plan) as ajoint owned plan with VICSES, through routine review and incorporationof intelligence extracted from flood and related studies and analysesand gained through operational flood experience.9.2 Improved CollaborationMelbourne Water, councils and other flood management stakeholders haverecognised the need for an integrated and sustainable approach whereresponsibility for activities is assigned on the capability of the agency todeliver. While key agencies can demonstrate the provision of specialised floodmanagement skills in the planning for, response to and recovery from floodingthere are opportunities to strengthen regional flood managementarrangements through greater collaboration and more efficient use ofresources.The collaborative development of this Flood Management Plan and the FloodEmergency Plan for the Shire of Yarra Ranges provides a basis for improvedcoordination and collaboration involving both technical and financialcontributions.60 Melbourne Water Shire of Yarra Ranges Flood Management Plan

10 Improvement PlanThis Part of the Shire of Yarra Ranges Flood Management Plan lists thoseactivities planned by the Shire of Yarra Ranges in conjunction with MelbourneWater in order to reduce that risk and the associated level of intolerability. Itreflects an understanding of the flood risks and proposes a program formitigating those risks within the Shire that are assessed as being intolerablein the context of current standards and community expectations withappropriate regard for regional issues and priorities.The actions below outline the agreed approach to managing existing regionalflood problems within the Shire of Yarra Ranges. They were identified througha gap analysis performed on flood mitigation and management measures toidentify gaps or areas requiring improvement.Melbourne Water Shire of Yarra Ranges Flood Management Plan 61

10.1 Action PlanPriorityIssue Action CostPriority (H, M, L)High (start in 6months), Medium(start within 2years), Low (start 3years +)Timing(CompletionDate)ResponsibilityCommentsLinkage to Flood Management andDrainage Strategy (MelbWater,2007)Existing flood riskFuture flood riskKnowledge baseEducation, awarenessand preparednessResponsibilities andcollaboration1Requirement for Shire wideFlood Emergency Plan (SES) ‐MEMP Flood Sub‐plan existsfor part of the Shire.Prepare Shire wide Flood EmergencyPlan using available flood intelligenceand link with MEMPIn kind High SES (MW, YR) Investigate and map locations of allgauges.In kindYR 23Existing flood depth locationsare not recorded and furtherdepth gauges are required aspart of the FEPFlood mapping and timelycollection of associated datawill improve understanding offlood risks and responses4 Updating of FMPComplete an investigation into thelocation and the required height ofroadside depth gaugesInvestigate and identify potentialfunding sources for installation ofgauges eg Emergency ManagementAustralia (EMA), VICSES, NationalFlood Response Advisory Group(NFRAG)Review and prioritise future floodmappingExchange mapping requirements andprioritiesContinue incorporating climatechange scenarios in all futuremodelling projectsReview and update of the FMP isrequired every five yearsAnnual review and reporting ofImprovement Plan actionsMediumYR In kind YR MW (YR)MW + YRMWIn kindLowYR + MW In kind YR + MW 62 Melbourne Water Shire of Yarra Ranges Flood Management Plan

567Little known about recreationfacility flood hazardsUnclear catchment boundariesbetween MW and Shire areas(Grace Burn Ave area is anexample)Unknown location andrequirements for farm damsEstablish contact with Parks Victoriaand initiate discussion on existingprinciples of management ofvulnerable recreational areas.Initiate program to implementprinciples on a priority basis acrossvulnerable Shire managed recreationfacilities.Initiate discussion between Shire andMelbourne Water to resolvecatchment boundaries and associatedresponsibilities where uncertaintyexistsLocate farm dams through GISprocessEstablish contact with the DSE todetermine actions Shire needs to takein response to farm dams (controlagency for dam failure) (see DSE/MWdocuments for farm dams)In kindMediumYR In kind YR In kind High YR + MW Currentlybeingcompleted aspart ofFMP byWaterTechnologyHighCURRENTLYBEINGCOMPLETED(WaterTechnology)YR In kind YR 89Absence of Community FloodAwareness and PreparednessEducation Plan and ProgramIncomplete treatment optionsof flooding hot spotsPrepare and implement CommunityEducation Plan (such as FloodSafe)with regard to riverene and urbanstormwater flooding and focusing onflooding 'hot spots'Increase general communityawareness of stormwatermanagement (eg OSD on sitedetention responsibilities, etc)Asses broader community need foraccess to flood informationIdentify flooding hot spots andprepare GIS layer.Feed into mapping program, floodemergency plan, asset managementplan etc. Investigate mitigationoptions for hot spot areas.In kindMediumSES (MW, YR) In kind YR (SES, MW) In kind YR (SES, MW) MediumYR (MW) YR (MW) Melbourne Water Shire of Yarra Ranges Flood Management Plan 63

1011121314Flooding from majorwaterways entering areasthrough local drainagenetwork.Currently no response plans inplace to deal with flooding causedby fires, landslips, dam failure,etc.Information provided byMelbourne Water to the Shirein GIS format could be betterutilisedFlood overlays have not beenupdated to reflect recent (Shireand MW) drainage and relatedworks eg. Brushy Creek,Chirnside Park MD.Infill development withindeveloped areas of YarraRanges will result in changes toflood behaviourInvestigate flood gate option oninfrastructure at threat of inundationfrom major waterways.Investigate and make links to existinglandslip and fire strategies.Take stock of what is provided, how itis used and what is available.Agree and implement a process toroutinely transfer identifiedinformation and provides for periodicdiscussion and review.Review past works and determine theneed for new/updated inundationmapping.Review Council's stormwatermanagement policy and proceduresat a regional level to ensure that theimpacts of any development onrunoff behaviour is consideredConsider the requirement for adrainage system strategy that hasregard for existing drainage hot spotsand development pressures.Medium YR + MW In kind Low YR In kindYR HighIn kind YR + MW In kind Medium YR + MW In kindYR LowIn kind YR Consider outcome of the MelbourneWater RSS review and applicationwithin YR and discuss with YR.In kind MW (YR) 15Yarra Ranges have no mappingof the Yarra River upstream ofWarburtonAssess the public risk factors with aview to adding to MW Risk Matrixand flood mapping programEnsure Flood Emergency Plan hasregard for Upper Yarra Dam breakassessment mappingIn kindMediumMW (YR) In kind YR 64 Melbourne Water Shire of Yarra Ranges Flood Management Plan

161718Location of complaints caninform flood mitigationresponsesDrainage Strategy notformalisedUnclear on Shire's power toenforce onsite (rain tanks,detention systems) detentionfor small (areas less than 1 ha)developmentsIdentify pinch points from customercomplaint database (ie where failureor blockage will result in flooding)Introduce detailed maintenance plans(Shire of Yarra Ranges)/reviewexisting asset management plans(MW) for critical drainage (pinchpoints) areas within Shire of YarraRangesInvestigate the need forinfrastructure improvements andwhere feasible implementimprovements.Develop formal Drainage Strategythat includes specific objectives alongwith a program of works to facilitatethe achievement of objectives in thecontext of Shire support for infill andredevelopment eg. No over floorflooding from Council drains,minimum design standards, nounacceptable risk etc.Investigate in conjunction withMelbourne Water (and othercouncils?) best practice techniquesand ways to implement via planningand related instruments.MediumYRPinchpoints' arelocalisedpoints inthedrainagenetworkthat arecritical totheperformance of thesystem.Whenblocked willcauselocalised ornetworkwidefloodingissues.YR + MW YR + MW High YR In kind Low YR (MW) Melbourne Water Shire of Yarra Ranges Flood Management Plan 65

11 Monitoring and ReviewThis Flood Management Plan is a live document. As such it will need to bereviewed each year to ensure that it continues to accurately reflect flood risksand their treatment within the Municipality as well as prevailing statutory andpolicy requirements. It should also be revised at least every five (5) years toreflect achievement of work program objectives and changes to work programpriorities. While Melbourne Water will assist with the revision process, it willneed to be driven and managed by Council. Unless scheduled otherwise, it issuggested that the review and revision processes should occur immediatelybefore the annual budget cycle so that maximum opportunity can be made ofavailable funding sources and processes in partnership with stakeholderentities.Melbourne Water will be responsible for initiating review and updates with theShire of Yarra Ranges.Melbourne Water and the Shire of Yarra Ranges will track and report to eachother on actions in the Improvement Plan on a 12 monthly basis.11.1 Document controlThis version: Draft v3Version NumberDateFrequency of ReviewNext Review DueResponsible OfficerApproved byDraftFive yearly or earlier as requiredNicole Biscan,Project Manager Flood StrategyImplementation, Floodplain ServicesMelbourne WaterDocument historyVersion Date Comments/changes66 Melbourne Water Shire of Yarra Ranges Flood Management Plan

12 How this document was developedThis document was developed by the following people:• Nicole Biscan, Flood Management and Drainage Strategy, MelbourneWater• Robin Bishop, Floodplain Services, Melbourne Water• Kevin Johnson, Drainage Engineer, Shire of Yarra Ranges• Michael Cawood, Michael Cawood & Associates Pty Ltd• Chris Beardshaw, Team Leader Urban Drainage, Water Technology• Luke Cunningham, Project Manager, Water TechnologyMelbourne Water Shire of Yarra Ranges Flood Management Plan 67

13 ABBREVIATIONS & ACRONYMSThe following abbreviations and acronyms are used in this FloodplainManagement Plan:For exampleAEPAIIMSARICEOCFADHSDNREDSEFOIMTLSIOMEMPMEROOSDPMFPMPSBOSWMPUFZVBRsVICSESVPPsWSUDAnnual Exceedance ProbabilityAustralasian Inter-service Incident Management SystemAverage Recurrence IntervalChief Executive OfficerCountry Fire AuthorityDepartment of Human ServicesDepartment of Natural Resources & Environment (now DSE)Department of Sustainability and Environment (successor body toDNRE)Floodway OverlayIncident Management TeamLand Subject to Inundation OverlayMunicipal Emergency Management PlanMunicipal Emergency Resource OfficerOn-Site Stormwater Detention SystemProbable Maximum FloodProbable Maximum PrecipitationSpecial Building OverlayStormwater Management PlanUrban Floodway ZoneVictorian Building RegulationsVictoria State Emergency ServiceVictorian Planning ProvisionsWater Sensitive Urban design68 Melbourne Water Shire of Yarra Ranges Flood Management Plan

13.1 GLOSSARYBelow are terms defined for the purpose of this Plan.TermDrainage systemDefinitionA series of drains and waterways into which surface andstorm water flows. Features of a drainage system caninclude underground pipe drains, open channels,retarding basins, floodways, waterway improvements,water quality works and environment protectionmeasures. All drainage under 60 ha is maintained andoperated by Darebin City CouncilOverlandfloodingFloodplainInundation by local runoff caused by heavier than usualrainfall. Overland flooding can be caused by local runoffexceeding the capacity of an urban stormwater drainagesystem or by the backwater effects of mainstreamflooding causing urban stormwater drainage system tooverflow.Area of land adjacent to a creek, river, estuary, lake,dam or artificial channel, which is subject to inundationby the probable maximum flood.Natural drainagesystemsFlowpaths which are largely undeveloped by humansources, these include rivers, streams, naturaldepressions and wetlands. All natural systems greaterthan 60 ha are managed by Melbourne Water.Hot spotRunoffFlash floodingA known flood problem area which has a history ofrepeat flooding of a road, crossing or property, oftenhighlighted through anecdotal information and customercomplaints. It is a localised issue which will vary fromcouncil to council.The amount of rainfall that enters the stormwaterdrainage system, (underground pipes, overland flowpaths, floodway and waterways) after losses such asinfiltration has been taken into account.Sudden unexpected flooding caused by local heavyrainfall or rainfall in another area. Often defined asflooding which occurs within six hours of the rain whichcauses flooding.Melbourne Water Shire of Yarra Ranges Flood Management Plan 69

APPENDIX A – ASSET LIST70 Melbourne Water Shire of Yarra Ranges Flood Management Plan

ID Waterway Name ID Waterway Name ID Waterway Name ID Waterway Name401 OLD JOES CREEK (UPPER) D.S. 5515 TRIB OF MCMAHONS CREEK 5715 TRIB OF YARRA CREEK 5894 CROOKED CREEK403 UPPER DANDENONG CREEK 5516 TRIB OF MCMAHONS CREEK 5716 TRIB OF YARRA RIVER TRIB 5895 MUDDY CREEK404 BUNGALOOK CREEK (UPPER) 5517 TRIB OF LOWES CREEK 5717 TRIB OF YARRA RIVER TRIB 5896 BIG BILL CREEK408 GARDEN ST D.S. 5518 TRIB OF MCMAHONS CREEK 5718 TRIB OF YARRA RIVER TRIB 5897 LITTLE YANKEE JIM CREEK409 KILSYTH M.D. D.S. 5519 TRIB OF 5885 5719 TRIB OF 5715 5898 TRIB OF YARRA CREEK410 KILSYTH WEST D.S. 5520 TRIB OF 5883 5720 WOORI YALLOCK CREEK 5902 TRIB OF DRY CREEK (5656)412 KILSYTH M.D. 5521 TRIB OF WATTS RIVER 5721 TRIB OF WOORI YALLOCK CREEK 5905 TRIB OF STEELS CREEK414 FUSSEL RD DRAIN 5522 TRIB OF WATTS RIVER 5722 TRIB OF WANDIN YALLOCK CREEK 5906 TRIB OF STEELS CREEK415 DOBSONS CREEK 5523 TRIB OF WATTS RIVER 5723 WANDIN YALLOCK CREEK 5907 TRIB OF STEELS CREEK504 EUMEMMERRING CREEK UPPER 5524 TRIB OF WATTS RIVER 5724 TRIB OF WANDIN YALLOCK CREEK 5908 TRIB OF STEELS CREEK517 HEATHERTON RD EAST DRAIN 5525 TRIB OF WATTS RIVER 5725 TRIB OF WOORI YALLOCK CREEK 5909 TRIB OF 5647802 LYSTERFIELD WEST D.S. 5526 TRIB OF WATTS RIVER 5726 WILD CATTLE CREEK 5910 WALSH CREEK809 FERNTREE GULLY CREEK 5527 TRIB OF WATTS RIVER 5727 TRIB OF WOORI YALLOCK CREEK 5911 TRIB OF PAUL CREEK810 FERNY CREEK (U/S RB) 5528 MOSQUITO CREEK 5728 WILD DOG CREEK (5728) 5912 TRIB OF PAUL CREEK811 MONBULK CREEK (UPPER) 5529 TRIB OF MOSQUITO CREEK 5729 TRIB OF WILD CATTLE CREEK 5913 TRIB OF PAUL CREEK813 FERNY CREEK 5530 TRIB OF MOSQUITO CREEK 5730 TRIB OF WOORI YALLOCK CREEK 5914 TRIB OF PAUL CREEK814 MONBULK CREEK 5531 TRIB OF MOSQUITO CREEK 5731 WATTLE CREEK (LOWER) 5915 TRIB OF PAUL CREEK817 UPWEY CREEK 5532 TRIB OF WATTS RIVER 5732 TRIB OF WOORI YALLOCK CREEK 5916 TRIB OF PAUL CREEK818 SHERBROOKE CREEK 5533 TRIB OF GRACE BURN CREEK 5733 TRIB OF WOORI YALLOCK CREEK 5917 TRIB OF PAUL CREEK819 MAST GULLY CREEK 5534 TRIB OF GRACE BURN CREEK 5734 TRIB OF WOORI YALLOCK CREEK 5918 TRIB OF 5917910 FOREST RD DRAIN 5535 TRIB OF YTHAN CREEK 5735 TRIB OF WOORI YALLOCK CREEK 5919 TRIB OF 59181314 MUDDY CREEK 5536 TRIB OF YTHAN CREEK 5736 DEVILS CREEK 5920 CLEAR CREEK2800 BUNYIP RIVER (UPPER) 5537 TRIB OF DEEP CREEK 5737 SHEEP STATION CREEK 5921 TRIB OF PAUL CREEK2801 DODD CREEK 5538 TRIB OF DEEP CREEK 5738 LONE STAR CREEK 5922 TRIB OF NEW CHUM CREEK2802 WORLLEY CREEK 5539 TRIB OF DEEP CREEK 5739 TRIB OF MCCRAE CREEK 5923 TRIB OF MICK CREEK2803 HEAD CREEK 5541 TRIB OF DEEP CREEK 5740 COCKATOO CREEK 5924 TRIB OF NEW CHUM CREEK2804 MOOMBA CREEK 5542 TRIB OF DEEP CREEK 5741 MCCRAE CREEK 5925 TRIB OF 59242805 BILLOW CREEK 5543 TRIB OF DEEP CREEK 5742 HANSEN CREEK 5926 TRIB OF NEW CHUM CREEK5016 TRIB OF HACKETT CREEK 5544 TRIB OF DEEP CREEK 5743 TRIB OF MCCRAE CREEK 5927 TRIB OF NEW CHUM CREEK5017 TRIB OF BEER CREEK 5546 TRIB OF 5545 5745 MACCLESFIELD CREEK 5928 TRIB OF NEW CHUM CREEK5018 TRIB OF BERR CREEK 5547 TRIB OF 5546 5746 TRIB OF COCKATOO CREEK 5929 TRIB OF NEW CHUM CREEK5019 TRIB OF BLACK SAND CREEK 5548 TRIB OF DEEP CREEK 5747 SHEPHERD CREEK 5930 ALDERMANS CREEK5026 TRIB OF MACKLEY CREEK 5550 BRUSHY CREEK (LOWER) 5750 TOMAHAWK CREEK 5931 TRIB OF NEW CHUM CREEK5027 BLACKWOOD CREEK 5551 TRIB OF BRUSHY CREEK (LOWER) 5755 BOGGY CREEK 5932 TRIB OF NEW CHUM CREEK5028 TRIB OF BLACKWOOD CREEK 5552 BLACKWOOD DR DRAIN 5756 FERNDALE CREEK 5933 TRIB OF NEW CHUM CREEK5029 TIN MILE CREEK 5553 TRIB OF BRUSHY CREEK (LOWER) 5757 MIDDLE CREEK 5934 TRIB OF MYERS CREEK5038 TRIB OF CROOKED CREEK 5554 TRIB OF BRUSHY CREEK (LOWER) 5758 TRIB OF WOORI YALLOCK CREEK 5935 TRIB OF MYERS CREEK5039 HOPE GULLY CREEK 5555 BRUSHY PARK RD DRAIN 5759 EGG ROCK CREEK 5937 TRIB OF DIXONS CREEK5043 TRIB OF YARRA CREEK 5557 MOOROOLBARK NORTH DRAIN 5760 STONEY CREEK 5938 TRIB OF DIXONS CREEK5044 TRIB OF YARRA CREEK 5558 TRIB OF O'SHANNASSY RIVER 5761 DESMOND CREEK 5939 TRIB OF DIXONS CREEK5045 TRIB OF MUDDY CREEK 5559 TRIB OF 5558 5762 TRIB OF WOORI YALLOCK CREEK 5941 TRIB OF 59185046 TRIB OF LYREBIRD CREEK 5560 BRUSHY CREEK (UPPER) 5763 CLUB CREEK 5945 TRIB OF YARRA RIVER5047 TRIB OF O'SHANNASSY RIVER 5561 LINCOLN RD DRAIN 5764 TRIB OF WOORI YALLOCK CREEK 5946 TRIB OF 5945Melbourne Water Shire of Yarra Ranges Flood Management Plan 71

ID Waterway Name ID Waterway Name ID Waterway Name ID Waterway Name5048 TRIB OF O'SHANNASSY RIVER 5562 WANDANA CRES DRAIN 5765 MENZIES CREEK 5947 TRIB OF 56665049 TRIB OF O'SHANNASSY RIVER 5563 ANDREW ST DRAIN 5766 TI‐TREE CREEK 5948 TRIB OF 56665207 CUMBERLAND CREEK 5564 FIVE WAYS DRAIN 5767 BOB MANN CREEK 5949 TRIB OF 56665208 TRIB OF CUMBERLAND CREEK 5565 MOOROOLBARK DRAIN 5768 EMERALD CREEK 5950 WOOD CREEK5209 TRIB OF CUMBERLAND CREEK 5566 BALCOMBE AVE DRAIN 5769 NATHANIA SPRINGS CREEK 5951 TRIB OF 56665210 TRIB OF CUMBERLAND CREEK 5567 CARRONVALE RD DRAIN 5771 TRIB OF YARRA CREEK 5952 TRIB OF 56665213 TRIB OF CUMBERLAND CREEK 5568 PEMBROKE RD DRAIN 5772 TRIB OF YARRA CREEK 5953 TRIB OF 56665214 TRIB OF ARMSTRONG CREEK 5579 TRIB OF DONNELLY CREEK 5773 TRIB OF YARRA CREEK 5954 TRIB OF 56585215 TRIB OF ARMSTRONG CREEK 5580 MATHINA CREEK 5774 URE CREEK 5955 TRIB OF 56585216 TRIB OF ARMSTRONG CREEK 5581 TRIB OF ETTERSGLEN CREEK 5775 WEBERS CREEK 5956 TRIB OF 56585218 TRIB OF 5217 5582 TRIB OF ETTERSGLEN CREEK 5776 WOORI YALLOCK M.D. DIVERSION 5957 TRIB OF 56585219 TRIB OF 5217 5583 CONTENTMENT CREEK 5777 TRIB OF YARRA CREEK 5958 TRIB OF YARA RIVER5221 TRIB OF 5217 5584 MYRTLE CREEK 5778 TRIB OF YARRA RIVER 5959 TRIB OF LILLYPONDS CREEK5222 TRIB OF ARMSTRONG CREEK 5585 TRIB OF MYRTLE CREEK 5780 HODDLES CREEK 5960 TRIB OF 59595224 TRIB OF ARMSTRONG CREEK 5586 TRIB OF WATTS RIVER 5781 PERRINS CREEK 5962 TRIB OF LILLYPONDS CREEK5225 TRIB OF ARMSTRONG CREEK 5587 MORLEY CREEK 5782 TRIB OF HODDLES CREEK 5963 TRIB OF 56185226 TRIB OF ARMSTRONG CK EAST BR 5588 TRIB OF WATTS RIVER 5783 TRIB OF HODDLES CREEK 5967 TRIB OF 56735227 DONOVAN CREEK 5589 TRIB OF 5588 5784 TRIB OF HODDLES CREEK 5968 TRIB OF GRACE BURN CREEK5228 TRIB OF DONOVAN CREEK 5590 TRIB OF 5588 5785 TRIB OF HODDLES CREEK 5970 TRIB OF YARRA RIVER5229 TRIB OF DONOVAN CREEK 5591 TRIB OF WATTS RIVER 5786 TRIB OF HODDLES CREEK 5971 TRIB OF YARRA RIVER5231 PURCHES ST DRAIN 5592 TRIB OF WATTS RIVER 5787 TRIB OF HODDLES CREEK 5972 TRIB OF YARRA RIVER5233 TRIB OF BRITON CREEK 5593 TRIB OF WATTS RIVER 5788 TRIB OF HODDLES CREEK 5975 TRIB OF LOG CREEK5234 BEARS CREEK 5594 TRIB OF 5593 5789 WOMBAT CREEK 5976 TRIB OF LOG CREEK5235 TRIB OF WALSH CREEK 5595 TRIB OF 5593 5790 DON RIVER 5978 TRIB OF LOG CREEK5236 TRIB OF 5235 5596 TRIB OF WATTS RIVER 5791 TRIB OF URE CREEK 5979 TRIB OF LOG CREEK5237 TRIB OF WALSH CREEK 5597 TRIB OF WATTS RIVER 5792 TRIB OF YARRA CREEK 5980 TRIB OF LOG CREEK5238 THEODORE CREEK 5598 TRIB OF WATTS RIVER 5793 TRIB OF 5792 5983 TRIB OF 57095239 SNOBS CREEK 5599 TRIB OF WATTS RIVER 5794 TRIB OF DON RIVER 5985 TRIB OF DON RIVER5240 BRANCH CREEK 5602 CHIRNSIDE PARK DRAIN 5795 TRIB OF DON RIVER 5986 TRIB OF DEE RIVER5241 TRIB OF BRANCH CREEK 5603 PAYNES RD DRAIN 5796 MYRTLE CREEK 5987 TRIB OF CEMENT CREEK EAST BR5242 TRIB OF BRANCH CREEK 5605 TRIB OF 5610 5797 TRIB OF YARRA CREEK 5988 TRIB OF WEBSTER CREEK5243 TRIB OF 5242 5606 COLDSTREAM DRAIN 5799 TRIB OF YARRA CREEK 5989 TRIB OF YARRA RIVER5244 TRIB OF BRANCH CREEK 5607 TRIB OF LILYDALE EAST DRAIN 5800 YARRA RIVER (5800) 5990 TRIB OF YARRA RIVER5245 TRIB OF LEARMONTH CREEK 5608 CHERRY HILL DRAIN 5802 PLATTS CREEK 5991 TRIB OF WOORI YALLOCK CREEK5246 TRIB OF LEARMONTH CREEK 5609 TRIB OF YARRA RIVER 5803 YANKEE JIM CREEK 5993 TRIB OF 57325247 MOON GULLY CREEK 5610 OLINDA CREEK 5804 WALKERS CREEK 5994 TRIB OF WANDIN YALLOCK CREEK5248 TRIB OF MACKLEY CREEK 5611 TRIB OF 5610 5805 YTHAN CREEK 5995 TRIB OF WILD CATTLE CREEK5249 TRIB OF TIN MILE CREEK 5612 LILYDALE EAST DRAIN 5806 SCOTCHMANS CREEK 5997 TRIB OF 56245250 TRIB OF CUMBERLAND CREEK 5613 FULLER RD DRAIN 5807 BRISBANE CREEK 5998 TRIB OF 56245251 TRIB OF CUMBERLAND CREEK 5614 NELSON RD DRAIN 5808 DEE RIVER 5999 TRIB OF FOUR MILE CREEK5252 TRIB OF 5217 5615 LILYDALE DRAIN 5809 PHEASANT CREEK 6010 BEER CREEK5253 TRIB OF ARMSTRONG CREEK 5616 HEATHFIELD GROVE DRAIN 5810 LITTLE YARRA RIVER 6019 TRIB OF YARRA RIVER5254 TRIB OF DONOVAN CREEK 5617 HEREFORD RD DRAIN 5811 TRIB OF LT YARRA RIVER 6029 GOLDING CREEK72 Melbourne Water Shire of Yarra Ranges Flood Management Plan

ID Waterway Name ID Waterway Name ID Waterway Name ID Waterway Name5255 BRITON CREEK 5618 TRIB OF STRINGYBARK CREEK 5812 YARRA JUNCTION M.D. 6039 TRIB OF 57865256 DAMPER CREEK 5619 LYREBIRD GULLY CREEK 5813 BRITANNIA CREEK 6048 BACK ‐ STAIRS CREEK5257 TRIB OF DAMPER CREEK 5620 STRINGYBARK CREEK 5814 TRIB OF BRITANNIA CREEK 6049 TRIB OF 58065258 TRIB OF DAMPER CREEK 5621 LILYPONDS CREEK 5815 EDWARDSTOWN CREEK 6057 TRIB OF YARRA RIVER5259 TRIB OF CLEAR CREEK 5622 RICH CREEK 5816 TUGWELL CREEK 6058 TRIB OF THE BARRIER CREEK5260 TRIB OF YARRA CREEK 5623 YORK RD DRAIN 5817 KILN CREEK 6059 TRIB OF 60585261 BATTS CREEK 5624 TRIB OF STRINGYBARK CREEK 5818 THE BARRIER CREEK 6069 TRIB OF THE BARRIER CREEK5262 TRIB OF BATTS CREEK 5625 WATTLE VALLEY CREEK 5819 SLATY CREEK 6075 TRIB OF ARMSTRONG CREEK EAST5263 TRIB OF 5262 5626 TRIB OF 5634 5820 CONDON CREEK 6076 TRIB OF ARMSTRONG CREEK EAST5264 TRIB OF YARRA CREEK 5627 TRIB OF OLINDA CREEK 5821 FIR TREE CREEK 6077 TRIB OF ARMSTRONG CREEK EAST5265 DOCTORS CREEK 5628 TRIB OF STRINGYBARK CREEK 5822 BLACK SAND CREEK 6078 TRIB OF ARMSTRONG CREEK EAST5266 WOMBAT CREEK 5629 LOG CREEK 5823 HACKETT CREEK 6079 TRIB OF ARMSTRONG CREEK EAST5267 TRIB OF ALDERMANS CREEK 5630 WISHING WELL CREEK 5824 SAXTON CREEK 6086 TRIB OF YARRA RIVER5268 TRIB OF ALDERMANS CREEK 5631 WALLABY CK / TRIB OF OLINDA CK 5825 LEARMONTH CREEK 6087 FEHRING CREEK5269 TRIB OF 5268 5632 MELBA AVE DRAIN 5826 BLAKE CREEK 6088 TRIB OF YARRA RIVER5270 TRIB OF YARRA CREEK 5633 CAMBRIDGE RD DRAIN 5827 BOYS CAMP CREEK 6089 RIFLE RANGE GULLY5271 TRIB OF YARRA CREEK 5634 LITTLE STRINGYBARK CREEK 5828 MACKLEY CREEK 6095 TRIB OF LYREBIRD GULLY CREEK5272 TRIB OF YARRA CREEK 5636 TRIB OF STRINGYBARK CREEK 5829 FITZPATICK CREEK 6096 TRIB OF OLINDA CREEK5273 TRIB OF YARRA CREEK 5637 TRIB OF STRINGYBARK CREEK 5830 FRENCHMANS CREEK 6097 TRIB OF OLINDA CREEK5274 TRIB OF YARRA CREEK 5638 TRIB OF STRINGYBARK CREEK 5831 KOBECKE CREEK 6098 TRIB OF FERNDALE CREEK5275 TRIB OF YARRA CREEK 5640 STEELS CREEK 5832 STOCKDALES CREEK 6099 TRIB OF MCCRAE CREEK5276 TRIB OF 5275 5642 TRIB OF STEELS CREEK 5833 ROCKY CREEK 6109 TRIB OF MACCLESFIELD CREEK5277 TRIB OF YARRA CREEK 5643 DIXONS CREEK 5834 STARLING CREEK 6117 TRIB OF MACCLESFIELD CREEK5278 TRIB OF 5277 5647 DIXONS CREEK EAST BRANCH 5835 DIRT GULLY CREEK 6118 TRIB OF MACCLESFIELD CREEK5279 CONTENTION GULLY 5649 CALDER CREEK 5836 POSTMAN CREEK 6119 TRIB OF MACCLESFIELD CREEK5280 TRIB OF CONTENTION GULLY 5650 TRIB OF STEELS CREEK 5837 TAYLOR CREEK 6120 TRIB OF 61175281 TRIB OF YARRA CREEK 5651 TRIB OF STEELS CREEK 5838 TRIB OF BLACK SAND CREEK 6128 TRIB OF COCKATOO CREEK5282 NINE MILE CREEK 5652 TRIB OF STEELS CREEK 5839 TRIB OF LT YARRA RIVER 6129 TRIB OF 61285283 TRIB OF NINE MILE CREEK 5653 TRIB OF STEELS CREEK 5841 TRIB OF BIG PATS CREEK 6130 TRIB OF COCKATOO CREEK5284 TRIB OF NINE MILE CREEK 5654 TRIB OF STEELS CREEK 5842 LITTLE MICK CREEK 6138 TRIB OF DESMOND CREEK5285 FALLS CREEK 5655 JEHOSAPHAT CREEK 5843 MISSISSIPPI CREEK 6139 TRIB OF TI‐TREE CREEK5286 TRIB OF FALLS CREEK 5656 DRY CREEK (5656) 5844 LYREBIRD CREEK (5844) 6140 TRIB OF TI‐TREE CREEK5287 TRIB OF YARRA CREEK 5657 TRIB FULL AND PLENTY CREEK 5845 TRIB OF MISSISSIPPI CREEK 6141 TRIB OF BOB MANN CREEK5288 EIGHTEEN MILE CREEK 5658 TRIB OF YARRA CREEK 5846 BRIDE CREEK 6143 TRIB OF COCKATOO CREEK5290 BAKER CREEK 5659 FULL AND PLENTY CREEK 5847 JOHNSON CREEK 6148 TRIB OF SHEPHERD CREEK5291 TRIB OF BAKER CREEK 5661 TRIB OF MISSISSIPPI CREEK 5848 COLLAS CREEK 6149 TRIB OF SHEPHERD CREEK5292 TRIB OF BAKER CREEK 5662 TRIB OF MISSISSIPPI CREEK 5849 SMYTH CREEK 6151 TRIB OF EGG ROCK CREEK5293 WOOD CREEK (5293) 5663 TRIB OF MISSISSIPPI CREEK 5850 MORTIMERE CREEK 6152 TRIB OF EGG ROCK CREEK5294 WOOD CREEK (5294) 5666 TRIB OF YARRA CREEK 5851 HYDE CREEK 6153 TRIB OF TOMAHAWK CREEK5295 TRIB OF YARRA CREEK 5668 TRIB OF 5722 5852 STORM CREEK 6154 TRIB OF TOMAHAWK CREEK5297 TRIB OF MENZIES CREEK 5669 TRIB OF YARRA CREEK 5853 MUDDY CREEK (5853) 6156 TRIB OF TOMAHAWK CREEK5299 TRIB OF WANDIN YALLOCK CREEK 5670 WATTS RIVER 5854 ANDERSONS CREEK (5854) 6159 TRIB OF MCCRAE CREEK5300 TRIB OF WANDIN YALLOCK CREEK 5671 PICANINNY CREEK 5855 CEMENT CREEK 6160 TRIB OF HANSEN CREEKMelbourne Water Shire of Yarra Ranges Flood Management Plan 73

ID Waterway Name ID Waterway Name ID Waterway Name ID Waterway Name5301 TRIB OF WATTLE CREEK (LOWER) 5672 TRIB OF PICANINNY CREEK 5856 CEMENT CREEK EAST BRANCH 6161 TRIB OF HANSEN CREEK5304 TRIB OF LITTLE YARRA RIVER 5673 TRIB OF WATTS RIVER 5857 WEBSTER CREEK 6162 TRIB OF SLATY CREEK5305 TRIB OF LITTLE YARRA RIVER 5674 RAILWAY PARADE M.D. 5858 CEMENT CREEK WEST BRANCH 6163 TRIB OF 61625306 TRIB OF DON CREEK 5675 TRIB OF SLATY CREEK 5859 TRIB OF YARRA CREEK 6164 TRIB OF LT YARRA RIVER5307 TRIB OF PLATTS CREEK 5676 DON RD DRAIN 5860 O'SHANNASSY RIVER 6165 TRIB OF LT YARRA RIVER5308 TRIB OF NEW CHUM CREEK 5678 GRACE BURN CREEK 5861 TRIB OF O'SHANNASSY RIVER 6166 TRIB OF LT YARRA RIVER5309 TRIB OF DIXONS CREEK 5679 BIG FLUME CREEK 5862 TRIB OF O'SHANNASSY RIVER 6167 TRIB OF LT YARRA RIVER5310 TRIB OF 5926 5680 TRIB OF GRACE BURN CREEK 5863 TRIB OF YARRA CREEK 6168 TRIB OF LT YARRA RIVER5311 TRIB OF DONNELLY CREEK 5681 FEDERAL CREEK 5864O'SHANNASSY RIVER WESTBRANCH 6169 TRIB OF HACKETT CREEK5315 TRIB OF 5980 5682 TRIB OF GRACE BURN CREEK 5865 TRIB OF YARRA CREEK 6170 TRIB OF BLAND SAND CREEK5316 TRIB OF 5637 5683 NEW CHUM CREEK 5866 TRIB OF YARRA CREEK 6172 TRIB OF MENZIES CREEK5317 TRIB OF OLINDA CREEK 5684 MICK CREEK 5867 DEEP CREEK 6174 TRIB OF MENZIES CREEK5434 TRIB OF DEEP CREEK 5685 RED CREEK 5868 BRAHAMS CREEK 6186 TRIB OF CHERRY HILL DRAIN5435 TRIB OF DEEP CREEK 5686 MYERS CREEK 5869 MCDONALD CREEK 6187 TRIB OF YARRA RIVER5436 TRIB OF DEEP CREEK 5687 RICHARDS CREEK 5870 STARVATION CREEK 6188 TRIB OF COCKATOO CREEK5437 TRIB OF DEEP CREEK 5688 TRIB OF STARVATION CREEK 5871 TRIB OF STARVATION CREEK 6189 TRIB OF O'SHANNASSY RIVER WEST5439 TRIB OF BELLELL CREEK 5689 DONNELLYS CREEK 5872 BAKER CREEK 6190 TRIB OF O'SHANNASSY RIVER WEST5449 TRIB OF BELLELL CREEK 5690 TRIB OF STARVATION CREEK 5873 TRIB OF STARVATION CREEK 6191 TRIB OF O'SHANNASSY RIVER WEST5457 TRIB OF BELLELL CREEK 5691 ORANGE CREEK 5874 TRIB OF STARVATION CREEK 6192 TRIB OF O'SHANNASSY RIVER WEST5458 TRIB OF BELLELL CREEK 5692 SAWPIT CREEK 5875 DEDMAN CREEK 6193 TRIB OF O'SHANNASSY RIVER WEST5459 TRIB OF BELLELL CREEK 5693 CONDON CREEK 5876 BURN CREEK 6194 TRIB OF O'SHANNASSY RIVER WEST5469 TRIB OF BELLELL CREEK 5694 ETTERSGLEN CREEK 5877 FLOWERPOT CREEK 6195 TRIB OF O'SHANNASSY RIVER WEST5499 ELY CREEK 5695 TRIB OF 5874 5878 YELLOW CREEK 6196 TRIB OF O'SHANNASSY RIVER WEST5500 MARTIN GULLY 5696 TRIB OF STARVATION CREEK 5879 BLUE NOSE CREEK 6197 TRIB OF 61965501 MORRIS GULLY 5697 GEORDIE CREEK 5880 MCMAHONS CREEK 6198 TRIB OF 61965502 POWLES CREEK 5698 MARBLE CREEK 5881 SMOKO CREEK 6199 TRIB OF 61965503 KING CREEK 5700 YARRA RIVER (5700) 5882 TRIB OF MCMAHONS CREEK 5900 YARRA RIVER5504 NO. 3 CREEK 5701 LYREBIRD CREEK 5883 TRIB OF MCMAHONS CREEK 5660 PAUL CREEK5505 TRIB OF BRITANNIA CREEK 5702 IDA ROY CREEK 5884 TRIB OF MCMAHONS CREEK 5664 TRIB OF YARRA CREEK5506 TWIN CREEK 5703 RUNDELLS CREEK 5885 TRIB OF MCMAHONS CREEK 5943 TRIB OF 56645507 TRIB OF BIG PATS CREEK 5704 CASELLS CREEK 5886 QUARRY CREEK 5944 TRIB OF 56645508 DWYER GULLY 5707 HEARSE CREEK 5887 TRIB OF MCMAHONS CREEK 5641 STEELS CREEK HENDERSON RD TRIB5509 CROCK CREEK 5709 TRIB OF YARRA CREEK 5888 LOWES CREEK 5639 YARRA GLEN M.D.5510 BLUEY CREEK 5710 CORANDERRK CREEK 5889 TWO MILE CREEK 5600 YARRA RIVER (5600)5511 TRIB OF MCMAHONS CREEK 5711 BOGGY CREEK (5711) 5890 ARMSTRONG CREEK 5635 TRIB OF YARRA CREEK5512 TRIB OF MCMAHONS CREEK 5712 PUNCHGULLY CREEK 5891 FOUR MILE CREEK 5840 BIG PATS CREEK5513 TRIB OF MCMAHONS CREEK 5713 TRIB OF CORANDERRK CREEK 5892 TRIB OF YARRA CREEK 5779 TRIB OF YARRA CREEK5514 TRIB OF 5513 5714 TRIB OF CORANDERRK CREEK 5893 ARMSTRONG CREEK EAST BRANCH 5289 TRIB OF EIGHTEEN MILE CREEK74 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Melbourne Water Shire of Yarra Ranges Flood Management Plan 75

76 Melbourne Water Shire of Yarra Ranges Flood Management Plan

Melbourne Water Shire of Yarra Ranges Flood Management Plan 77

78 Melbourne Water Shire of Yarra Ranges Flood Management Plan

APPENDIX B – ROLES AND RESPONSIBILITIESA large number of organisations at different levels are directly involved inmanaging various aspects of flooding within Victoria, as set out in the tablebelow.Level Organisation Core roleNationalBureau of MeteorologyDept of Transport &Regional ServicesEmergency ManagementAustraliaDepartment of SocialSecurityState of VictoriaRegionalVictoria PoliceVictoria State EmergencyServiceDepartment of HumanServicesEnvironment ProtectionAuthorityDepartment ofSustainability &EnvironmentDepartment ofInfrastructureDepartment of JusticeMelbourne WaterFlood forecast and warningWarnings of weather conditions likely to causeflash floodingFinancial assistance for planning, warning &mitigation initiativesEmergency management planning andcoordinationFinancial and other support services for affectedareasRegional emergency planning and responsecoordinationResponsible for flood response as well asassisting council with their Municipal EmergencyManagement Planning, can assist council witheducation, awareness, warning systems andemergency management planning.Impart expertise in emergency recoverymanagement, and can assist with thedevelopment of Municipal EmergencyManagement Plans and public health sub plans.Assess environmental impact of floodemergenciesHas the primary responsibility for thedevelopment of strategies and policy in relationto flood and stormwater management at a statewidelevelLand use and development policyState-wide Emergency Management PolicyFinancial assistance and grants for those affectedby floodingPrimary responsibility for identification of floodextents, providing flood warning advice forMelbourne Water Shire of Yarra Ranges Flood Management Plan 79

LocalVicRoadsMunicipal Councilsmajor waterways, controlling development infloodplains, providing advice on flooding to localcouncils and the community, developing plans,and undertaking actions to minimise floodingand flood damage in the Port Phillip andWesternport region.Drainage for major arterial roadsEstablish and maintain a Planning Scheme thatincludes relevant flood provisions (i.e.administer and enforce planning provisions andbuilding regulations for flood affected land)Manage flooding issues to reduce risks andimpactsEnsure flood information is available to informdecisionsManage local urban (street and property) andupstream drainageManagement of open spaces along waterwaycorridorsImplement and maintain local flood warningsystemsMaintain and enhance local flood informationDevelop and implement flood emergencyresponse plansSupport community education and awareness onflood risksReview and expand on Melbourne Water/council sections.80 Melbourne Water Shire of Yarra Ranges Flood Management Plan

APPENDIX C - FLOOD RISK ASSESSMENTBelow is the risk assessment matrix result for this municipality, by catchment,from the Melbourne Water Flood Risk Assessment Framework and Matrix,noting the catchments with medium, high or extreme (‘intolerable’) risk rating.Projects to mitigate flood risk will need to be categorised, discussed andprioritised with due consideration of Council and Melbourne Water priorities,aims, work programs and targets - in other words a program needs to bedeveloped for their implementation. The resulting program will need to alsorecognise residual risks and propose management measures that are likely toinclude improved community awareness, flood response planning andpreparedness.Any proposed land use planning or controls to be implemented or investigatedshould be included in the program.Catchment name #Commercial/industrypropertieswithin 1%AEP floodextent#residentialpropertieswithin 1%AEP floodextent#propertiestotalRiskscore(outof 10)Risk rating(medium,high,extreme)BLACKWOOD CREEK 6 MediumCUMBERLAND CREEK 6 MediumBELLELL CREEK 7 MediumBRUSHY CREEK (UPPER) 74 931 1005 8 HighCHIRNSIDE PARK DRAIN 7 MediumCHERRY HILL DRAIN 7 MediumOLINDA CREEK 7 MediumSTRINGYBARK CREEK 6 MediumSTEELS CREEK 6 MediumDIXONS CREEK 6 MediumTRIB OF YARRA RIVER 6 MediumPAUL CREEK 6 MediumTRIB OF YARRA RIVER 7 MediumTRIB OF YARRA RIVER 6 MediumWATTS RIVER 0 3 3 7 MediumPICANINNY CREEK 0 8 8 7 MediumGRACE BURN CREEK 7 MediumNEW CHUM CREEK 7 MediumMYERS CREEK 6 MediumDONNELLY CREEK 7 MediumYARRA RIVER 6 MediumCORANDERRK CREEK 7 MediumMelbourne Water Shire of Yarra Ranges Flood Management Plan 81

TRIB OF YARRA RIVER 6 MediumWOORI YALLOCK CREEK 0 0 0 7 MediumWANDIN YALLOCK6 MediumCREEKSHEEP STATION CREEK 0 0 0 6 MediumCOCKATOO CREEK 6 MediumMCCRAE CREEK 6 MediumURE CREEK 6 MediumHODDLES CREEK 6 MediumDON RIVER 6 MediumTRIB OF YARRA RIVER 6 MediumTRIB OF YARRA RIVER 6 MediumYARRA RIVER 0 1 1 8 HighLITTLE YARRA RIVER 0 1 1 8 HighBRITANNIA CREEK 6 MediumSLATY CREEK 6 MediumBLACK SAND CREEK 6 MediumHACKETT CREEK 6 MediumSAXTON CREEK 6 MediumLEARMONTH CREEK 6 MediumMACKLEY CREEK 6 MediumBIG PATS CREEK 6 MediumMISSISSIPPI CREEK 6 MediumCEMENT CREEK 6 MediumO'SHANNASSY RIVER 7 MediumO'SHANNASSY RIVER7 MediumWEST BRANCHDEEP CREEK 7 MediumSTARVATION CREEK 6 MediumMCMAHONS CREEK 6 MediumARMSTRONG CREEK 6 MediumARMSTRONG CREEK6 MediumEAST BRANCHYARRA RIVER 6 MediumWALSH CREEK 6 MediumCLEAR CREEK 6 MediumALDERMANS CREEK 6 MediumFEHRING CREEK 6 MediumEUMEMMERRING CREEKUPPERHEATHERTON ROADEAST DRAIN7 Medium7 Medium82 Melbourne Water Shire of Yarra Ranges Flood Management Plan

APPENDIX D – FARM DAMS IN THE SHIRE OF YARRARANGESThe failure of farm dams has the potential to threaten local communities andcause property and environmental damage. A study of farm dams in NewSouth Wales shows a 23% failure rate (Dept NRE, 2002 6 ), although it shouldbe noted that ‘dam failure’ includes failure to meet design specifications and isnot limited to collapse. Farm owners are bound by a duty of care to ensurethat the safety of dams on their property is maintained and are held legallyresponsible (s.16 Water Act 1989) for any damage that may occur. The WaterAct 1989 dictates that the following license types are required, issued by therelevant Licensing Authority:Take and Use License; for the use of water from dams for irrigation andcommercial purposes (s.51 Water Act 1989);Works License; for the operation and construction of dams categorised aspotentially hazardous (s.67 Water Act 1989).Within the Shire of Yarra Ranges, the Melbourne Water Corporation (MWC) isthe Licensing Authority responsible for the issue and regulation of licenses andregistration.Different processes are in place for the licensing of new and existing dams,both on and off waterways. A key licensing requirement imposed by MWCdictates that construction must be supervised by a suitably qualified engineer.The construction of new dams on waterways poses significant environmentalrisk concerning the ecology and hydrology of downstream river networks; thusdams of this nature are not supported by MWC.Existing dams are categorised as potentially hazardous if they meet thefollowing criteria concerning dam wall height and capacity:Dam wall height ≥ 5m and storage capacity ≥ 50 ML;Dam wall height ≥ 10m and storage capacity ≥ 20 ML;Dam wall height ≥ 15m and storage capacity n/a.Dams designed for the domestic and stock functionality which do not lie on adesignated waterway do not require a license under the Act; however, aplanning permit may still be required from the local council.6 Dept NRE, 2002, Your Dam, Your Responsibility, The State of Victoria,Department of Natural Resources and Environment.Melbourne Water Shire of Yarra Ranges Flood Management Plan 83

As a part of this FMP, Water Technology has identified and mapped all of theMelbourne Water registered dams (provided separately as a MapInfo GIStable). It is considered that these are the dams that could be considered thehighest risk due to their capacities. The remaining dams within the Shire aregenerally much smaller stock use dams which pose a smaller risk.84 Melbourne Water Shire of Yarra Ranges Flood Management Plan

APPENDIX E – MELWAYS MAPS SHOWING 100 YEARFLOOD EXTENTMelbourne Water Shire of Yarra Ranges Flood Management Plan 85

MAP 37Joins Map 279ABCDEFGHJK12345Joins Map 366789101112ABCDEFGHJKJoins Map 51NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 370 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 38Joins Map 280ABCDEFGHJK1234567Joins Map 11889101112ABCDEFGHJKJoins Map 52NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 380 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 51Joins Map 37ABCDEFGHJK12345Joins Map 506789101112ABCDEFGHJKJoins Map 65NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 510 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 52Joins Map 38ABCDEFGHJK1234567Joins Map 12089101112ABC D EFGHJKJoins Map 66NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 520 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 65AJoins Map 51B CDE FGHJK12345Joins Map 646789101112ABCDEFGHJKJoins Map 74NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 650 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 66Joins Map 52ABC D EFGHJK1234567Joins Map 12289101112ABCDEFGHJKJoins Map 75NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 660 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 74Joins Map 65ABCDEFGHJK12345Joins Map 736789101112A BC D E FGHNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 83JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 74K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 75Joins Map 66ABCDEFGHJK1234567Joins Map 12489101112A B CDEFGHJKNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 84YARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 750 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 83Joins Map 74ABC D EFGHJK12345Joins Map 826789101112ABCDEFGHJKJoins Map 108NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 830 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 84Joins Map 75ABCDEFGHJK1234567Joins Map 12689101112A BCDE FGHNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 109JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 84K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 108AJoins Map 83B CDE FGHJK12345Joins Map 916789101112ABCDEFGHJKJoins Map 110NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1080 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 109Joins Map 84ABC D EFGHJK1234567Joins Map 21089101112ABCDEFGHJKJoins Map 111NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1090 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 118Joins Map 281ABCDEFGHJK12345Joins Map 386789101112ABCDEFGHJKJoins Map 120NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1180 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 119Joins Map 282A B CDEFGHJK1234567Joins Map 28589101112ABCDEFGHJKJoins Map 121NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1190 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 120Joins Map 118ABCDEFGHJK12345Joins Map 526789101112ABCDEFGHJKJoins Map 122NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1200 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 121Joins Map 119A B C D E FGHJK1234567Joins Map 30589101112ABCDEFGHJKJoins Map 123NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1210 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 122Joins Map 120ABC D EFGHJK12345Joins Map 666789101112ANOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.B CDE FGHJKLEGEND100 Year ARI Flood ExtentJoins Map 124YARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1220 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 123Joins Map 121ABCDEFGHJK1234567Joins Map 30789101112ABCDEFGHJKJoins Map 125NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1230 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 124AJoins Map 122B CDE FGHJK12345Joins Map 756789101112ABCDEFGHJKJoins Map 126NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1240 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 125Joins Map 123ABCDEFGHJK1234567Joins Map 30989101112A B CDEFGHJKNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 127YARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1250 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 126Joins Map 124ABCDEFGHJK12345Joins Map 846789101112A BC D E FGHJKNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 210YARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 1260 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 210Joins Map 126ABCDEFGHJK12345Joins Map 1096789101112ABCDEFGHJKJoins Map 212NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2100 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 266Joins Key Map 10ABCDEFGHJK1234567Joins Map 26789101112A B CDEFGHJKJoins Map 274NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2660 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 267Joins Key Map 10ABCDEFGHJK12345Joins Map 2666789101112ABCDEFGHJKJoins Map 275NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2670 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 268Joins Key Map 10ABC D EFGHJK1234567Joins Map 26989101112ABCDEFGHJKJoins Map 276NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2680 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 269Joins Key Map 10ABCDEFGHJK12345Joins Map 2686789101112ABNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.C D EFGHLEGEND100 Year ARI Flood ExtentJoins Map 277JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 269K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 270Joins Key Map 10ABCDEFGHJK12345678Joins Key Map 104511612ABCDEFGHJKJoins Map 278NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2700 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 273Joins Map 265ABC D EFGHJK12345Joins Map 2726789101112ABCDEFGHJKJoins Map 279NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2730 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 274Joins Map 266ABCDEFGHJK1234567Joins Map 27589101112A B CDEFGHJKNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 280YARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2740 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 275Joins Map 267A B CDEFGHJK12345Joins Map 2746789101112ABCDEFGHJKJoins Map 281NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2750 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 276Joins Map 268ABC D EFGHJK1234567Joins Map 27789101112ABCDEFGHJKJoins Map 282NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2760 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 277Joins Map 269A B C D E FGHJK12345Joins Map 2766789101112ABCDEFGHJKJoins Map 283NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2770 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 278Joins Map 270ABC D EFGHJK1234567Joins Key Map 1089101112ABCDEFGHJKJoins Map 284NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2780 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 279Joins Map 273ABCDEFGHJK12345Joins Map 246789101112ABCDEFGHJKJoins Map 37NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2790 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 280Joins Map 274A B CDEFGHJK1234567Joins Map 28189101112A B C D EFGHNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 38JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 280K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 281Joins Map 275ABC D EFGHJK12345Joins Map 2806789101112ABNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.C D EFGHLEGEND100 Year ARI Flood ExtentJoins Map 118JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 281K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 282Joins Map 276ABCDEFGHJK1234567Joins Map 28389101112ABCDEFGHJKJoins Map 119NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2820 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 283Joins Map 277ABCDEFGHJK12345Joins Map 2826789101112ABCDEFGHJKJoins Map 285NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2830 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 284Joins Map 278A BCDE FGHJK1234567Joins Key Map 1089101112ABCDEFGHJKJoins Map 286NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2840 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 285Joins Map 283ABCDEFGHJK12345Joins Map 1196789101112A B CDEFGHJKJoins Map 305NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2850 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 286Joins Map 284ABCDEFGHJK123Joins Key Map 10456789Joins Map 287101112ABCDEFGHJKJoins Map 306NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2860 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 287Joins Key Map 10ABCDEFGHJK123Joins Map 286456789Joins Map 306101112ABCDEFGHJKJoins Key Map 10NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2870 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 288Joins Map 612 ref S2A B CDEFGHJK12345Joins Map 28967891011Joins Map 612 ref S312ABCDEFGHJKJoins Map 612 ref S3NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2880 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 289Joins Map 612 ref S2A B C D EFGHJK12Joins Map 612 ref S23456789Joins Map 288101112ABCDEFGHJKJoins Map 612 ref S3NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2890 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 290Joins Map 612 ref T2A B CDEFGHJK123Joins Map 2914567891011Joins Map 612 ref T212A BCDE FGHNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 612 ref T3JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 290K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 291Joins Map 612 ref T2ABCDEFGHJK12Joins Map 612 ref T23456789Joins Map 290101112A BC DEFGHNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 612 ref T2JYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 291K0 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 292Joins Map 612 ref T2ABCDEFGHJK12345678Joins Map 612 ref U29101112ABCDEFGHJKJoins Map 612 ref T2NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 2920 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 305Joins Map 285ABCDEFGHJK12345Joins Map 1216789101112ABCDEFGHJKJoins Map 307NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 3050 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 306Joins Map 286ABCDEFGHJK123Joins Map 287456789Joins Key Map 14101112ABC D EFGHJKJoins Map 308NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 3060 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 307Joins Map 305ABCDEFGHJK12345Joins Map 1236789101112ABCDEFGHJKJoins Map 309NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 3070 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 308Joins Map 306A BCDE FGHJK1234567Joins Key Map 1489101112ABCDEFGHJKJoins Map 310NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 3080 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 309Joins Map 307A BCDE FGHJK12345Joins Map 1256789101112ABCDEFGHJKJoins Map 311NOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentYARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 3090 250 500125 Metres1:20,000 at A4Water Technology December, 2010

MAP 310Joins Map 308ABCDEFGHJK1234567Joins Key Map 1489101112A B CDE FGHJKNOTEThis map has been reproduced with the permissionof Melways Publishing.DISCLAIMERThe Yarra Ranges Shire and Water Technology Pty. Ltd. doesnot warrant that this document is definitive nor free from error anddoes not accept liability for any loss caused or arising from relianceupon information provided herein.LEGEND100 Year ARI Flood ExtentJoins Map 312YARRA RANGES SHIREFLOOD MANAGEMENT PLANMAP 3100 250 500125 Metres1:20,000 at A4Water Technology December, 2010

86 Melbourne Water Shire of Yarra Ranges Flood Management Plan