East Derwent Highway Upgrade Development Application

East Derwent Highway Upgrade

Development Application Report

August 2020

Table of ContentsINTRODUCTION ........................................................................................................................................................ 4

BACKGROUND .......................................................................................................................................................... 4

STRATEGIC RATIONALE AND PROJECT OBJECTIVES ................................................................................................... 5

OPTIONS ANALYSIS ............................................................................................................................................ 5

SITE DESCRIPTION .............................................................................................................................................. 6

LOCATION ......................................................................................................................................................... 6SITE ................................................................................................................................................................. 6SURROUNDS ...................................................................................................................................................... 7TITLES .............................................................................................................................................................. 8EXISTING ROAD AND ROADSIDE ENVIRONMENT ........................................................................................................ 10

PROPOSAL .......................................................................................................................................................... 12

DESIGN .......................................................................................................................................................... 14BRIDGE STRUCTURES.......................................................................................................................................... 19PUBLIC TRANSPORT ........................................................................................................................................... 20PEDESTRIANS AND CYCLISTS ................................................................................................................................. 20LOCAL ROADS AND PRIVATE ACCESSES ................................................................................................................... 21STORMWATER .................................................................................................................................................. 21SERVICE RELOCATIONS ....................................................................................................................................... 22LANDSCAPING .................................................................................................................................................. 23LIGHTING ........................................................................................................................................................ 23LAND ACQUISITION............................................................................................................................................ 23GEOLOGY ........................................................................................................................................................ 23FLORA & FAUNA ............................................................................................................................................... 24LAND CAPABILITY .............................................................................................................................................. 24NATURAL HAZARDS ........................................................................................................................................... 24HISTORIC HERITAGE ........................................................................................................................................... 24ABORIGINAL HERITAGE ....................................................................................................................................... 24NOISE ............................................................................................................................................................ 24CONSTRUCTION ................................................................................................................................................ 25

STAKEHOLDER ENGAGEMENT ...................................................................................................................... 26

SITE PHOTOGRAPHS ........................................................................................................................................ 27

PLANNING SCHEME .......................................................................................................................................... 29

ASSESSMENT OF AN APPLICATION FOR USE OR DEVELOPMENT ..................................................................................... 29PLANNING SCHEME OBJECTIVES............................................................................................................................ 30USE CATEGORISATION ........................................................................................................................................ 30PART C ZONES ................................................................................................................................................. 30PART D CODES ................................................................................................................................................. 43PART F SPECIFIC AREA PLANS ............................................................................................................................... 70

TASMANIAN HERITAGE REGISTER ............................................................................................................... 71

STATE POLICIES ................................................................................................................................................ 71

CONCLUSION...................................................................................................................................................... 73

Introduction

This report supports a development application by the Department of State Growth (State Growth) tothe Clarence City Council (Council) for the East Derwent Highway Upgrade.

The purpose of this highway upgrade is to improve the capacity and safety along the East DerwentHighway between Golf Links Road and Sugarloaf Road (a stretch of approximately 1.5 kilometres) byduplicating the existing single carriageway to provide a total of four lanes (two each way), and upgradingthe Geilston Bay Road/Clinton Road intersection to include the installation of traffic signals. The projectwill:

· make the highway wider to have four lanes of traffic – two lanes in each direction· build a new concrete raised central median and safety barrier to reduce the risk of crashes· install new traffic lights at the upgraded intersection at Clinton Road and Geilston Bay Road· build safer access off the highway to Araluen Street, Lindisfarne North Primary School and

Geilston Bay Recreation Area· add an off-road shared path and on-road cycling lanes, and· improve the left-turn pocket at the Sugarloaf Road intersection.

Section 6 of this report provides a detailed assessment of the proposal.

The proposed upgrade requires development approval under the Clarence Interim Planning Scheme2015 (the Scheme). Section 9 of this report provides a detailed assessment against the relevantprovisions of the Scheme.

This report is supported by the following appendices:

· Appendix A: Council’s Application form· Appendix B: Certificates of Title· Appendix C: Drawings· Appendix D: Department of State Growth - Crown landowner consent· Appendix E: Department of Education - Crown landowner consent· Appendix F: Clarence Council - Council landowner consent· Appendix G: Natural Values Assessment (Jacobs, August 2020)· Appendix H: Noise Assessment (Jacobs, July 2020)· Appendix I: Ground Conditions Assessment (Jacobs, August 2019)· Appendix J: Hydraulics Impact Assessment (Jacobs, August 2020)· Appendix K: Traffic Assessment (Jacobs, August 2020)

BackgroundThe East Derwent Upgrade from Golf Links Road to Sugarloaf Road is a component of the TasmanianGovernment’s $117 million Southern Roads Package commitment in 2018. The objective of the Projectis to improve traffic flow and address safety concerns in this section of the corridor. This will be achievedthrough duplication of the existing highway to provide two lanes in each direction, as well as intersectionupgrades.

The East Derwent Highway is classified as a “Category 3 Road” under the Tasmanian State RoadHierarchy and is a key link in Greater Hobart’s transport network between the Tasman Highway atMontagu Bay and the Midland Highway at Bridgewater, on Hobart’s eastern shore. The section ofhighway between the Tasman Highway interchange and Grasstree Hill Road carries a diverse mix oftraffic including commercial vehicles, commuters, tourists and is predominantly dual carriageway in thissection, except for the project area which is a sole single carriageway section in Geilston Bay betweenGolf Links Road and Sugarloaf Road.

Traffic volumes throughout this section of the highway are relatively high, with a recent traffic surveyundertaken by the Department of State Growth in 2018 indicating that the combined, two way AnnualAverage Daily Traffic (AADT) 230m north of Golf Link Road was 17968 veh/day, with 6.7% of the trafficstream compromising of heavy vehicles. It is anticipated that the percentage of heavy vehicles willcontinue to increase based on the 1.5% increase observed in the 3 years between the 2015 and 2018counts.

Strategic Rationale and Project ObjectivesThe Tasmanian Government has committed to upgrading the section of the East Derwent Highwaybetween Golf Links Road and Sugarloaf Road to make it safer and improve traffic flow.

The objectives of the project are to:

· Increase the road capacity

· Improve traffic flow, and

· Address safety concerns in this section of the corridor

The key design features of the project include:

· Duplication of the existing single carriageway to provide four through lanes (two lanes in eachdirection)

· Installation of new traffic signals at the Dumbarton Drive / Clinton Road intersection

· A new raised central median and safety barriers to reduce ‘head on’ crash types

· Safer access off the highway to Araluen Street, Lindisfarne North Primary School and GeilstonBay Recreation Area

· The provision of an off-road shared path and on-road cycling lanes to promote active transport,and

· Increased turning capacity at key intersections including School Access Road, Golf Links Roadand Sugarloaf Road

Options AnalysisAn Options Analysis for the project was previously completed in 2018 and included initial engagementwith key stakeholders, Council and Department of Education (DoE) to assist selection of a preferredoption to develop to a Concept Design level. The analysis considered a number of improvementsadditional to duplication of the highway itself, including four different options for the location of a newsignalised intersection at Clinton Road / Geilston Bay Road and possible new access road routes toLindisfarne North Primary School and the Geilston Bay Recreation Area. At the time of finalising theConcept Design, it was noted that Council would soon be commencing a masterplan of the GeilstonBay Recreation Area, and that the design should take this into consideration as much as possible.

The options considered during the 2018 Concept Design phase of the project were revisited with all keystakeholders on a number of occasions through face to face meetings and informal correspondenceunder the scope of the current upgrade project, to ensure that the most suitable option was developedfurther for public consultation, and to a Detailed Design level.

Council’s Geilston Bay Recreation Area masterplan was released for tender in August 2019, aroundthe time of initial engagement activities with Council and DoE about the highway upgrade. During theseinitial engagement activities, it was noted that the highway upgrade and associated access roads shouldminimise impacts to land in the recreation area as much as possible to facilitate their future masterplan.Representatives from DoE, whilst supportive of the project and improved school access outcomes, alsonoted that land impacts around the school should be minimised as much as possible, to facilitate futureexpansion of the school.

Subsequently, adjustments to the locations of the new access roads have been updated since the 2018design, to ensure land impacts are minimal. Where feasibly possible, the width of the highway crosssection has been minimised and new access roads associated with the school and recreation area havebeen shifted as close as possible to the new highway, whilst not compromising the project’s safetyoutcomes.

Site Description

Location

The project site is in Geilston Bay, generally located on the East Derwent Highway between Golf LinksRoad in the south and Sugarloaf Road in the north.

The East Derwent Highway (route number B32) is an 18km long strategic arterial road, paralleling theeastern banks of Derwent River in Hobart and predominantly carries commuter traffic. The project isimpacting approximately 1.5km of the Highway. Figure 5-1 illustrates the project footprint as blackhatch.

Figure 5-1: Overall project footprint

Site

The site is located approximately 5.5 kilometres north-east from Hobart CBD. The ‘site’, i.e. the footprintof land impacted by the proposed physical works, is a long and linear in shape and generally matchingthe Highway for 1.5 kilometres.

The site comprises the following sections:

· East Derwent Highway: the majority of proposed works are within the existing Highway corridor.The Highway is currently a mix of single and dual lanes.

· Lindisfarne North Primary School: The School is located in the south-west portion of the projectsite. The actual School building and carpark are not within the footprint, only the accessways offDerwent Avenue and the Highway and northern part of the School’s grounds.

· Geilston Bay Recreation Area: The Recreation Area comprises of football ovals, tennis courts,a BMX track and a skate park. Only a small section of the Recreation Area is impacted by theproposed works, predominantly for the creation of the new section of Dumbarton Drive.

· Dumbarton Drive and Geilston Bay Road: The section of Geilston Bay Road between theHighway and Dumbarton Drive is proposed to be altered to make it into a cul-de-sac. DumbartonDrive is to be extended.

· Clinton Road: The access point of Clinton Road to the Highway is proposed to realigned to thesouth.

Surrounds

The site is bordered by a mix of land uses:

Residential

· The Highway is abutted by residentially zoned land on both sides, other than in the south-westsection where the School and Recreation Area is located.

· The residential lots abutting the south-east section of the site are constructed in fairly closeproximity to the Highway. The separation between the Highway and residential land is greaterin the northern section, as the Highway’s road reserve is wider and there is a section of OpenSpace zoned land on the western edge of Highway.

· The residential area to the east of the Highway is broken up by Faggs Creek Gully.· The residential area to the west of the Highway is a mix of existing and proposed dwellings –

the north-west section has been recently subdivided and not yet constructed.

Education

Lindisfarne North Primary School abuts the south-west portion of the Highway site. The Schoolsite is a large parcel of land, consisting of the School buildings located close to the intersectionof the Highway and Derwent Avenue and sporting grounds and play areas in the remainder tothe north.

Open space/recreation

· Geilston Bay Recreation Area is located to the west of the Highway, generally to the north ofthe School and south of Geilston Bay Road. The area consists of AFL/Cricket ovals, tenniscourts, bike/skate parks and a car parks.

· Faggs Creek Gully generally runs east-west through the centre of the site. It contains the Creekand adjoining walking track.

Commercial

The Highway and surrounding streets contain a small number of small businesses:

· Immediately to the south-west of the intersection of the Highway and Derwent Avenue is a FishShop and Butcher.

· At the corner of the Highway and Araluen Street is a Mechanic, Restaurant, Hair Studio.

Titles

Table 5-1 lists the individual pieces of land impacted by the project footprint.

Table 5-1 : Titles impacted by the project footprint

Property Address PropertyID

TitleReference Authority Extent of works

481 EAST DERWENTHWY GEILSTON BAYTAS 7015

7519075 113442/8 Acquired Road

Works in Highwaycorridor and upgradeintersection toSugarloaf Road.

481 EAST DERWENTHWY GEILSTON BAYTAS 7015

7519075 113442/7 Acquired RoadWorks in Highwaycorridor.

*NO ADDRESS (LARGEPARCEL OF LANDMAKING UPNORTHERNCOMPONENT OFHIGHWAY)

197048/1 Acquired Road

Works in Highwaycorridor.

150834/1 SubdivisionRoad


222376/1 Acquired RoadWorks in Highwaycorridor.




*This single titlecomprises multipleparcels with thefollowing worksoccurring:-Works in Highwaycorridor.-Works in Highwaycorridor and upgradeto Geilston Bay Road-Upgrade atintersection ofHighway and GolfLinks Road.

113496/3 Acquired RoadWorks in Highwaycorridor and upgradeto Geilston Bay Road

145187/101LGASubdivisionRoad

Upgrade atintersection ofDumbarton andGeilston Bay Road.

1 GEILSTON CREEKRD GEILSTON BAYTAS 7015

5116715 235698/1LocalGovernmentAuthority

Upgrade atintersection ofHighway andGeilston Creek Road.

*NO ADDRESS (LARGEPARCEL OF LANDMAKING UPSOUTHERNCOMPONENT OFHIGHWAY)

Road (typeunknown)


8 DEBOMFORDS LANEGEILSTON BAY TAS7015

5116379 Department ofEducation

Upgrade to GeilstonBay Road andinternal road fromGeilston Bay Road toSchool

'GEILSTON BAYRECREATION AREA' -18 DEBOMFORDSLANE GEILSTON BAYTAS 7015

1978262 227350/1LocalGovernmentAuthority

Upgrade to GeilstonBay Road


Upgrade atintersection ofHighway and AraluenStreet.

'LINDISFARNE NORTHPRIMARY SCHOOL' -271 EAST DERWENTHWY GEILSTON BAYTAS 7015

5116360 251889/1 Department ofEducation

Internal roadworks inthe School



Upgrade atintersection ofHighway andDerwent Avenue.

7857/1 Acquired Road

Upgrade atintersection ofHighway and GolfLinks Road.








6814/1 Acquired Road Works in Highwaycorridor.


Upgrade atintersection ofHighway and GolfLinks Road.


Upgrade atintersection ofClinton Road andGeilston Creek Road

83857/1 Acquired Road Works in Highwaycorridor.

9835/1 Acquired Road Works to the west ofHighway corridor

Existing Road and Roadside Environment

5.5.1 Road/Intersection

The Tasmania State Road Hierarchy identifies the East Derwent Highway as a Category 3 Road.Category 3 Roads are of strategic importance to regional and local communities and economies, theylink important towns to the Category 1 and Category 2 roads. While they are used by heavy freightvehicles, this use is less than that of Category 2 Roads.

The existing dual lane highway merges down to single carriageway just north of the four-way Golf LinksRoad / Derwent Avenue traffic signals, at the southern end of the highway upgrade. From Golf LinksRoad to Clinton Road, the highway abuts a high-density residential area to the east (Geilston Bay), andthe school and Recreational Area to the west. The posted speed through this section is 70 km/h. Alarge number of private properties, and several commercial businesses, have access onto the highwaywithin this section. Two unsignalised side roads intersect the highway approximately 25m apart,including Debomfords Lane servicing Geilston Bay Recreation Area west of the highway, and AraluenStreet servicing the broader residential area to the east. The pavement surface between Golf LinksRoad and Clinton Road is generally in poor condition, with limited texture and significant longitudinaland transverse cracking.

The existing four way unsignalised intersection of the highway with Clinton Road and Geilston BayRoad, just north of Faggs Gully Creek, provides short channelised right turn facilities into both sideroads and limited allowance for left turning vehicles. Although the intersection itself is positioned squareto the highway, the approaches to the intersection are predominantly curved. Due to the volume andspeed of through traffic along the highway, delays at side road approaches and for right turning vehiclesinto these side roads, are often lengthy.

North of Clinton Road, the road and roadside environment transforms to a wider road cross section andthe posted speed increases to 100 km/h as the highway rises between Sugarloaf and Government Hillstowards Risdon. The pavement surface in this area is also generally in poor condition. The highwayreturns to a dual divided carriageway approximately 150m south of Sugarloaf Road which marks thenorthern extent of the project area. Two large multi-unit developments off Clinton Road back onto theeastern side of the highway within this section, as well as a number of properties off Dumbarton Driveto the west. Two large approved subdivisions continue along the western boundary of the highwayheading towards Risdon, one of which is currently under construction and nearing completion.Discussions around access to the highway from these new subdivisions are ongoing, with one optionbeing to link the through road into the northern end of Dumbarton Drive.

5.5.2 Traffic Data

Traffic volumes along the section of the East Derwent Highway being upgraded are relatively high, witha 2018 traffic survey indicating that the combined, two-way Annual Average Daily Traffic (AADT) was17968 veh/day, approximately 230m north of Golf Links Road, with 6.7% of the traffic streamcompromising heavy vehicles (Department of State Growth, 2018). The percentage of heavy vehiclesincreased by 1.5% in the 3 years between the 2015 and 2018 counts.

Comprehensive traffic surveys were conducted in October 2019 to better understand the currentperformance of the road network in the study area and enable development of traffic models as part ofthe Traffic Impact Assessment of the proposed upgrade. The targeted surveys included AutomaticTraffic Counts (ATCs), Intersection Turning Movement Counts (TMCs) and queue length surveys for

each of the intersections in the project area. These counts were utilised in design of the intersectionconfigurations and interpretation of the crash data.

State Growth crash statistics over the past 10 years (2009 – 2019) indicate there have been a total of125 known crashes along East Derwent Highway within the project area, from in the vicinity of SugarloafRoad to just south of the Golf Links Road / Derwent Avenue intersection. The majority of crashes wereminor or involved property damage only, however there were a four serious crashes over the period;one at the intersection of Derwent Avenue and the Highway, one on East Derwent Highway south ofDebomfords Lane, one appearing off a side road adjacent to the Recreation Centre, and one on EastDerwent Highway at the southern end of the project limits near Broad Street.

In particular, approximately seventy percent of total crashes at intersections within the project area wererecorded near the intersections of East Derwent Highway with Sugarloaf Road (26 crashes) andDerwent Avenue / Golf Links Road (30 crashes). It should be noted that although the Derwent Avenue/ Golf Links Road has the most crashes it also conveys the most traffic by a significant margin, rangingfrom approximately 25 – 50 times the number of vehicles at the Sugarloaf Road intersection.

5.5.3 Public Transport

A number of bus services operate through the project site, including school services, as illustrated inFigure 5-2. There is one northbound bus stop along the highway just north of the intersection of thehighway with Debomfords Lane. Two southbound stops are within the project area, one situated justsouth of Clinton Road and the other approximately 100 m south of the Golf Links Road traffic signals.

Public bus services predominantly travel along the highway through the project area, with the exceptionof a route deviation from the main highway via Clinton Road and Sugarloaf Road.

Private school bus services also operate in the region, servicing a stop within Lindisfarne North PrimarySchool and utilising stops along the highway within the project area to provide transport services forstudents to schools in the surrounding suburbs.

Figure 5-2: Bus routes operating in the project footprint (Source:https://www.metrotas.com.au)

5.5.4 Pedestrian and Cyclist Movements

A number of formal and informal pedestrian and cycle paths exist within the project footprint.

· East Derwent Highway - south of Clinton Road where the Highway directly abuts the residentialarea, there is a pedestrian footpath on the eastern side of the Highway. To the north of ClintonRoad, it appears pedestrians utilise side roads to access residences. There are currently noformal bike lanes on the Highway, however the road shoulder may be informally used by cyclists.

· School and sports area - although there appears to be no formal built pedestrian or cycle tracks,it is understood pedestrians and cyclists traverse the school and sports area.

· Faggs Gully Creek - running generally east-west there is a walking and cycling track followingthe Creek, linking to the Clarence Foreshore Trail, Bedlam Walls to the west and Pilchers Hilltrack network to the west.

· Geilston Bay Road - pedestrians and cyclists can access the Faggs Gully Creek track viapedestrian bridges, however the road itself does not appear to have dedicated pedestrian orcyclist facilities.

5.5.5 Private Accesses

There a large number of private properties, and several commercial businesses, with private accessonto the highway within the project area, particularly on the eastern side of the highway between GolfLinks Road and Clinton Road. No private land is expected to be impacted by the project footprint.

ProposalTable 6-1 summarises the different components of the proposed works. The drawing numbers referredto can be viewed in Appendix C.

Table 6-1 : Summary of Proposed Works

Project Plan Proposed works

Across whole of project

· Widening of Highway to allow duplication from 2 to 4 lanes of trafficnorth of Golf Links Road and south of Sugarloaf Road (Highwayalready 4 lanes either side of this).

· New concrete raised central median and safety barrier for whole newsection of Highway, other than between north of Clinton Road andsouth of Sugarloaf Road. Provision of a flexible safety barrier in thecentral median north of Clinton Road

· New concrete shared path (cycle and pedestrian) generally in front ofschool and Geilston Bay Recreation Area.

· New 1.5m bicycle lanes along East Derwent Highway with head-startboxes at intersections.

· Reinstatement of street lights and new street lights for new sections ofroad (refer to Lighting Layout Plan for details)

· Removal of vegetation on edge of existing Highway road reserve andlocations of new sections of Debomfords Lane and Dumbarton Drive(refer to ‘Ecological Values Mapping’ within the ecology appendix forspecific details and locations). Reinstatement of landscaping to makegood disturbed areas (refer to Landscape Layout Plan for details).

· New stormwater conveyance infrastructure to supplement the existingsystem where required, including water sensitive urban designcomponents

· Reconstruction of existing pavement and surfacing.

Drawing 1301 (southernmost section)

· Upgrade to intersection of Highway and Derwent Avenue/Golf LinksRoad. The right-turning lane storage lengths for both north and southapproaches have also been increased from 50m and 60m, to 90mand 65m, respectively. U-turns have been allowed at the northapproach.

· Upgrade to School entry from Derwent Avenue To be left-hand inonly for northbound traffic. This updated access point will alsoprovide a dedicated left-turn lane with approximately 50m storagelength, separated from highway through traffic. *No change tointernal school carpark.

Drawing 1302

· Upgrade to School entry from Highway, including upgrade to existingroundabout.

· Removal of intersection of Debomfords Lane and Highway

· Extension of Debomfords Lane to the north to meet new section ofDumbarton Drive.

· New School Access Road (not a pubic road and located within theSchool site) linking School to Debomfords Lane.

· Alter intersection of Araluen Street and Highway, converted to a ‘left inleft out’ intersection.

Drawing 1303

· Removal of intersection of Geilston Bay Road and Highway. GeilstonBay now ends as a cul-de-sac immediately to the west of the Highway.

· Relocation of intersection of Clinton Road and Highway to the south,to align with with new intersection of Highway and Dumbarton Drive.This new 4-way intersection to have traffic lights. New intersectionspans a section of Faggs Creek Gully by way of a culvert under theintersection.

· Alteration of intersection of Clinton Road and Geilston Creek Road.

· New private vehicle access off Geilston Creek Road providing accessto 328 and 330 East Derwent Highway.

Drawing 1308/1309

· Creation of new section of Dumbarton Drive from intersection ofGeilston Bay Road/ Dumbarton Drive to the Highway (immediately tothe south of Faggs Creek Gully). To include shared path and pathacross Creek linking to Geilston Bay Road.

· Upgrade intersection of Dumbarton Drive and Geilston Bay Road..

· New bio retention basin to manage stormwater, located immediately tosouth-east of new intersection of Dumbarton Drive and Highway.

Drawing 1306 (northern most section)

· Upgrade to intersection of Sugarloaf Road and Highway. Storagecapacity for the right turn lane at the southern approach to the EastDerwent Highway / Sugarloaf Road intersection has been increasedfrom 55m to 135m.

Design

The design was developed in accordance with the guidelines and standards listed below:· Department of State Growth Standards and Specifications· Austroads Guidelines· Australian Standards· Local Government Authority (LGAT) standards

6.1.1 Design Speed

Design speeds adopted along the highway and other local roads proposed within the project extentsare summarised below.

Posted speed limits along the highway will predominantly remain the same as existing, except for anexisting 80 km/h speed zone, which commences approximately 200m south of Sugarloaf Road forsouthbound traffic, and reduces to 70 km/h just north of the Clinton Road intersection. This section hasbeen removed as it does not meet the minimum speed zone length requirements based on AustroadsGuide to Traffic Management – Part 5. Design speeds nominally 10 km/h above the proposed postedspeed limit have been adopted for horizontal and vertical geometric design, including for local roads,as shown in Table 6-2.

Speed reductions within the project area and north of Sugarloaf Road are outside the scope of thisproject and are subject to separate speed limit reviews by State Growth on a case-by-case basis.

Table 6-2 : Design and Posted Speed Zones, East Derwent Highway (Northbound and Southbound)

Start Chainage End Chainage Design Speed (km/h) Posted Speed (km/h)

2800 3659 80 70

3659 4400 110 100

For the ancillary local roads, speed zones have been adopted in accordance with Table 6-3.

Table 6-3 : Design and Posted Speed Zones, New Local Roads

Local Road Component Design Speed (km/h) Posted Speed (km/h)

Dumbarton Drive 60 50

Debomfords Lane 25(1) 25(1)

School Access Road 50 40(1)An advisory speed of 25 km/h is required on the realigned connection of Debomfords Lane to DumbartonDrive, refer below.

A posted speed of 40 km/h is proposed along the school access road in accordance with AustralianStandards and Austroads Guidelines for school zones. Advisory 25 km/h speed signage is required forof the connection of Dumbarton Drive to Debomfords Lane. The geometry adopted for this roadsegment is a function of the swept path of the design vehicle (discussed below), limiting curve speedchecks, the location of the intersection of Dumbarton Drive and Debomfords Lane (to allow for vehiclequeuing movements) and minimising land use impacts for future master planning.

6.1.2 Design Vehicle

Design vehicles adopted along the highway and other local roads proposed within the project extentsare summarised below.

Table 6-4 : Nominal Design Vehicles within Project Extents

Road Component Design Vehicle Justification

East Derwent Highway 26m B-Double(1) The highway is on a B-Double route

Dumbarton Drive 12.5m Single Unit truck(2) Allowance for service vehicles andgarbage disposal services

Debomfords Lane 19m Semi-trailer(3) Allowance for large vehicles accessingthe boat club, based on stakeholderconsultation

School Access Road 12.5m bus(4) Buses using the school access road willbe predominantly standard length,based on stakeholder consultation

Geilston Bay Road 12.5m Single Unit truck(2)(5) Allowance for service vehicles andgarbage disposal services

(1)Particular movements not appropriate for the nominated design vehicle will be signed accordingly. Thisincludes the regulated U-turn movements at both sets of traffic signals (Golf Links Road / Derwent Ave andClinton Road / Dumbarton Drive), which will be signed for light vehicle movements only.

(2)The footprint of the new roundabout at Dumbarton Drive / Geilston Bay Road has had to be reduced tominimise impacts to the creek and adjacent properties. To accommodate the turn path of the prescribed design

vehicle, the central island radius of the roundabout (mountable) has been reduced to 5m, with an 8m circulatingwidth. There are roundabouts of a similar small footprint located nearby in Clarence.

(3)The width and alignment of the Debomfords Lane road segment is based on the swept path of the designvehicle, including widening of the throat of the Debomfords Lane / Dumbarton Drive intersection.

(4)The school access roundabout has a mountable apron to accommodate turn paths of the design vehicle andintermittent larger vehicles (such as articulated buses).

(5)LGAT standard dimensions adopted for the Geilston Bay Road cul-de-sac head are suited for single turnmovements by a B85/B99 vehicle. A multi-point turn will be required by service vehicles within the cul-de-sac.

6.1.3 Typical Cross Sections

In accordance with Austroads Guidelines and the Department of State Growth’s Professional ServicesSpecification, T3 – Road Design Standards, the following typical cross sections have been adopted along EastDerwent Highway.

Golf Links Road to Clinton Road (refer Figure 6-1) generally comprises:· 3.5m wide traffic lanes· 2.2m wide raised concrete centre median with pedestrian fencing· 3.5m wide turn lanes (as required)· 1.5m wide bike lane (northbound)· 2.0m wide bike lane (southbound), adjacent to parking lane· Barrier kerb and channel

Clinton Road to Sugarloaf Road (refer Figure 6-2) generally comprises:· 3.5m wide traffic lanes· 2.2m wide line marked median with central flexible safety barrier· 3.5m wide turn lanes (as required)· 1.5m wide road shoulders· 0.5m wide sealed verge (minimum)

Figure 6-1: East Derwent Highway typical section, north of Golf Links Road

Figure 6-2: East Derwent Highway typical section, north of Clinton Road

New local roads, including the extension of Dumbarton Drive, Debomfords Lane and the new schoolaccess road, have been designed in accordance with Local Government Association Tasmania (LGAT)requirements, as far as reasonably practical. Current road and lane widths have generally been retainedat existing side road intersection with the highway.

In line with the minimum LGAT requirements for a local through road (Table 1, TSD-R06-v1), theextension of Dumbarton Drive to the new traffic signals (refer Figure 6-3) generally comprises:

· 4.45m wide traffic lanes (to face of kerb)· Barrier kerb and channel· 1.5m wide footpath (one side only)· 2.0m verges both sides, safety barrier provided adjacent to the creek gully as required

The road reservation width with along Dumbarton Drive had been reduced from 18.0m to mitigateimpacts to Faggs Gully Creek and the adjacent sporting facilities.

The new Debomfords Lane section also generally meets the minimum requirements for a LGAT localthrough road, although as described in the previous sections, road width geometry has also beengoverned by the swept path of the design vehicle. Notably, a footpath has not been specifically providedalong this section, due to the proximity to the separately provided shared path adjacent to the highway.This road segment (refer Figure 6-4) generally comprises:

· 4.8m wide traffic lanes (to face of kerb)· Barrier kerb and channel· 2.0m verges, both sides with safety barrier provided as required

As above, the road reservation width with along Debomfords Lane has been reduced from 18.0m tomitigate impacts to adjacent sporting facilities, vegetation and Aboriginal heritage features. The roadcross narrows to tie-in with the existing Debomfords Lane section at approximately Ch 200 (MC13).

The school access road cross section (refer Figure 6-5) generally comprises:

· 4.45m wide traffic lanes (to face of kerb)· Barrier kerb and channel· 2.0m verge

Similarly to the previous road sections, the road reservation width along the access road has beenreduced to mitigate impacts to adjacent vegetation. A footpath has not been specifically provided alongthis section, due to the proximity of the separately provided shared path adjacent to the highway, whichprovides a connection to an existing zebra crossing within the school.

Figure 6-3: Dumbarton Drive Cross Section

Figure 6-4: Debomfords Lane Cross Section

Figure 6-5: School Access Road Cross Section

Bridge Structures

An existing concrete box culvert structure (Bridge number B44) under the Highway at Faggs GullyCreek will require extension on the upstream and downstream ends as part of the upgrade. A conditionassessment undertaken for this culvert in 2018 classified the entirety of B44 as in ‘Good’ condition. Asummary of the extensions is provided below.

Table 6-5 : B44 – Existing Highway Box Culvert, Structural Extensions

StructureNumber

Treatment Cell Dimensions(span x height)

Length ofExtension

Comments

Eastern This structure will requirean extension to facilitatethe access road to Lot No.228 and 230.

Preliminary checksindicate that the structuremay be extended using2100x2400 precast culvertcrown units.

15m A minor size mismatch may beexpected if standard metric units areused. Some grouting may be requiredto provide a smooth transition to thenew units. The existing retaining wall,wing walls and kerb will need to beremoved prior to the extension beinginstalled. In-situ or custom precast unitswill be required for the first 5m due toshape of the existing creek bed.

Western The existing culvertstructure requiresextending toaccommodate roadwidening

Preliminary checksindicate that the structuremay be extended using2100x2400 precast culvertcrown units.

13m Some grouting may be required toprovide a smooth transition to the newunits. The bed of the existing structurehas been filled with sediment and siltovertime and is to be cleared out andre-regraded with rock pitching (unlessconcrete slab is uncovered) in order tofacilitate extension units.

A twin box culvert is required under the new Dumbarton Drive/Geilston Bay Road roundabout,downstream of the existing creek crossing, approximately 200m downstream. This has been modelledas a 2/2100x2100 RCBC structure, with the final size and structural design to be confirmed by detailedflood modelling, and will comprise a concrete slab floor and precast wingwall units.

A Hydraulic Impact Assessment, further detailing drainage design considerations for these culverts hasbeen provided in Appendix J.

Public Transport

The existing northbound bus stop along the highway, in vicinity to Debomfords Lane, requires relocationapproximately 100 m south of its existing location. As the highway is being duplicated, public busservices deviating from the main highway via Clinton Road will now need to merge across two lanes oftraffic to access the right turn lane at the new Clinton Road traffic signals. Relocation of the stop furthersouth is also a flow on effect of the Clinton Road / Dumbarton Drive intersection moving further south.

Given the existing southbound stop at Clinton Road is positioned at the location of the upgradedsignalised intersection, this stop requires reinstatement and relocation further south. The stop has beenrelocated on the departure side of the intersection of the highway with Araluen Street, beside EasternShore Radiator Repairs, and virtually opposite the existing stop.

Both new bus stops have been designed in accordance with LGAT standards for a parallel indentedbus bay and will include reinstatement of existing shelters (where applicable) and upgraded to meetdisabled access requirements. Pedestrian connections from designated crossing points to each ofthese existing stops will be provided through the new concrete shared and/or upgraded asphalt footpathalong the eastern side of the highway, as detailed in Section 6.4.

The bus stop 100m south of Golf Links Road traffic signals will be retained and reinstated in its existingcondition. Consideration of bus turn paths at the school roundabout and access road have also beenconsidered, in line with the design vehicles outlined in Section 6.1.2.

Pedestrians and Cyclists

Acknowledging the urban setting of the project area and proximity of commercial areas, LindisfarneNorth Primary School and recreational facilities, there will be changes and improvements to existingpedestrian and cycling features as part of the project.

Pedestrians will be no longer be able to cross the highway haphazardly due to installation of a centralmedian pedestrian fence along the highway between Golf Links road and Clinton Road and on theDerwent Avenue intersection approach (RMS Type 1 or approved equal). Infrastructure will therebysafely direct pedestrians to a controlled crossing or bus stop boarding location, including installation oftactile ground surface indicators (TGSIs) for the visually impaired. The existing asphalt footpath alongthe eastern side of the highway between Golf Links Road to Clinton Road will be reinstated andimproved within the road reserve, with the aim of achieving the requirements of LGAT standards orAustroads Guidelines as far as reasonably practical within a brownfield site and without adverselyimpacting adjacent properties.

A new concrete shared user path for pedestrians and cyclists will be provided along the western sideof the highway between the existing pedestrian crossings at Derwent Avenue / East Derwent Highwayand a new signalised pedestrian crossing at East Derwent Highway / Clinton Road. This path alsoserves to function as an improved access path for Lindisfarne North Primary Scholl and the GeilstonBay Recreation Area. The new signalled crossing point at East Derwent Highway / Clinton Road willreplace the existing pedestrian refuge island across the highway near Araluen Street. All other newcrossing points across minor roads (e.g. in the recreation area and near the school) have been designedin accordance with Austroads guidelines and LGAT Standards.

Improved cycling facilities also included provision of new 1.5m bicycle lanes along the East Derwentfrom Golf Links Road to Clinton Road, with head-start boxes at intersections and delineation of conflict

zones. Although 1.5m road shoulders will be provided either side of the duplicated highway north ofClinton Road, these shoulders will not be line marked or signed as formal cycle lane facilities.

Local Roads and Private Accesses

A description of key aspects of new local road design components has been provided above. Thesecomponents have also been previously discussed with Department of Education and Clarence CityCouncil and optimised as far as possible to minimise adjacent land use impacts.

Due to pavement and footpath improvements proposed along the eastern side of the highway betweenGolf Links Road and Clinton Road, minor works to existing driveway crossovers will be required. Anycrossover impacted will be reinstated in its existing position and meet the minimum width requirementsfor urban driveways under the LGAT Standards. As there is no significant change in position or footprintof these accesses, existing sightlines will remain unchanged.

There are some accesses and associated footpath crossfalls which currently do not meet LGAT ordisabled access standards with respect to vertical transitions and/or crossfall. It is not always feasibleto make improvementswithout adversely impacting adjacent properties or compromising the safety ofthe road design. As far as reasonably practical, improvements have been made to improve footpathand driveway crossfalls, including localised adjustments to the parking lane crossfall, installation ofgrated wedge driveway crossovers (LGAT Std Drg TSD R14-v1) in locations where this helps flattenfootpath crossfalls and installation of a low-profile concrete nib wall against existing property boundarieswithin the road reserve (as required).

Discussions about access arrangements for retail businesses accessed from the highway and NubeenaCrescent just south of Golf Links Road intersection are still being held with affected business owners.The intent is to retain the current access point off the highway into this commercial area, howeverconsideration of required road design standards and safe turn paths is also required. The access offthe highway does not currently meet LGAT standards, with respect to driveway profile transitions andturn paths. There is also a current ingress and egress point from Nubeena Crescent to this precinct.

Geilston Creek Road provides access to a number of residential dwellings east of East DerwentHighway. Based on stakeholder feedback received from selected residents, a new access road will beprovided for residents closest to the new intersection to Geilston Creek Road. This new access roadwill meet the width requirements of an equivalent short local road cul-de-sac, with the geometry to becompliant with Austroads guidelines. This arrangement will provide greater separation between theresidents’ egress points and the adjacent traffic signals.

Stormwater

6.6.1 Existing stormwater network

A number of existing urban stormwater catchments, conveyed via an underground stormwater network,discharge to the main tributary of Faggs Gully Creek. The overall catchment for the creek drains anarea of approximately 6 km2. Other key features of the existing stormwater network within the projectextents include:

· Golf Links to Debomfords Lane – a large pit and pipe drainage network collects runoff fromsouth of Golf Links Road through to Araluen Street. Runoff is then conveyed in a trunk main(diameter varies between 1050mm and 900mm) along Debomfords Lane and discharges toFaggs Gully Creek, approximately 400m west of the highway.

· Dumbarton Drive – the catchment for the network draining to two large detention pits at theGeilston Bay Road / Dumbarton Drive intersection includes runoff from the new subdivisions,north-west of the project extents, as well as urban stormwater from Dumbarton Drive and across

the highway from an urban catchment along Clinton Road. The network includes a large earthenchannel, a detention system and multi-pipe outfall into Faggs Gully Creek.

Each of these features in addition to the performance of the existing network, are described in furtherdetail as part of the Hydraulic Impact Assessment undertaken for the project. Refer Appendix J.

6.6.2 Stormwater System Design Methodology and Modelling

Since the upgrade will involve a large increase in impervious area due to duplication of the highwayand addition of new local roads, the adequacy of the existing stormwater capture and conveyancesystem required hydraulic assessment and supplementing with additional infrastructure.

The design intent was to utilise the existing stormwater system and discharge points as much aspossible. Kerb and channel has been incorporated alongside the highway in a number of locations, andalong the new local roads to minimise impacts on adjacent land and reduce the amount of earthworksrequired in cutting drains. Due to the introduction of these hard drainage features, use of WaterSensitive Urban Design (WSUD) principles has been considered in the design to reduce impacts ofincreased catchment imperviousness on peak flows and water quality.

Minimal changes have been made to the existing highway’s vertical and horizontal geometry to ensurethat existing overland flow paths could be maintained along their natural alignment and afflux minimisedas much as possible. New stormwater infrastructure was introduced to assist in capturing flows fromthese overland flow paths, in particular, grated strip drains in the central median. New additions to thestormwater network have also been designed and graded to discharge runoff by gravity into publicstormwater infrastructure, which includes existing systems and/or watercourses.

New local road infrastructure west of the highway and on the southern side of Faggs Gully Creek requirenew discharge points to the creek to be introduced to avoid a lengthy trunk drainage system connectingto an existing outlet. These new outlet points have been proposed near the downstream extension ofthe twin box culvert under the highway where rock protection will be provided to prevent scour at theoutlet. Locating new discharge outlets in a location where scour protection is already proposed helpsmitigate the risk of further erosion and confines discharge points in one location so that natural streambed conditions can be maintained downstream as much as possible.

Although there may be an opportunity to further rationalise discharge points in the Detailed Designphase of the project, most of the new outlet points comprise relatively small catchments. The outlet withthe largest catchment has also been designed to incorporate a bio-retention basin upstream, which willdetain and slow flow velocities and improve the water quality of flows discharging into the creek.

Further details regarding the proposed drainage design are described in further detail as part of theHydraulic Impact Assessment undertaken for the project. Refer Appendix J.

Service Relocations

In addition to the stormwater network, there are a number of other utilities impacted by the road upgradethat will require relocation or protection as part of the works. For the most part, these works will beundertaken within the Crown’s road reservation between Golf Links Road and Clinton Road, includingimpacts to:

· Bulk transfer and reticulation water mains – water mains predominantly run along the westernside of the highway between Golf Links and Clinton Road. The 495mm diameter bulk transfermain is generally clear of the work footprint (with the exception of the shared path), until itcrosses the highway in vicinity to the new signalised intersection. Based on site excavations,this crossing is believed to be sufficiently deep to avoid impacts during construction. Relocationof a 200mm diameter reticulation main alongside the existing highway will require relocationbetween Golf Links Road and Debomfords Lane.

· Reticulation sewer mains – A number of existing sewer manholes will require relocation tooutside the new carriageway and thereby require connection and cutover to existing sewermains. Sewer crossings of the highway otherwise not impacted by the works, may requiremechanical protection where they have been found to be relatively shallow.

· Copper and optic fibre – shallow underground communication cables are likely to be impactedalong the eastern side of the highway during reconstruction of the existing asphalt footpathbetween Golf Links Road and Clinton Road. Cables along the western side of the highway aregenerally clear of the works footprint (with the exception of the shared path). There are someimpacts to cables due to relocation of Dumbarton Drive / Clinton Road signalised intersection.

· Underground low and high voltage power cables – a HV power cable crosses the highway justnorth of the Derwent Avenue / Golf Links Road traffic signals and runs along the western sideof the highway. It is likely a section of this cable will require relocation as part of the works.

There are also a small number of power poles that will require relocation as part of the works, and anumber of existing power poles which will be fitted with new street lighting outreaches as detailed inSection 6.9. Liaison with impacted service authorities to determine the scope of relocations is ongoing.

Landscaping

Landscaping adjacent to the Highway is proposedadjacent to the Highway corridor and includes a mixof native plant species and incorporation of a vegetated bioswale and retention basin. In developing theLandscaping Layout Plan (included in the Drawing set at Appendix C), consideration has been given toongoing maintenance and land use for school expansions and recreation area masterplanning.

The proposed revegetation of Faggs Gully Creek shown in the Landscaping Layout Plan is indicative.If Council has any particular direction on revegetation in this area, it is considered this can be expressedby way of condition of planning permit.

Lighting

Existing street lighting along the highway is being upgraded to meet the minimum requirements forCategory V5 standard lighting, including at the Sugarloaf Road intersection. New lighting to CategoryP5 minimum requirements has been provided on the new sections of Dumbarton Drive and DebomfordsLane, with additional lighting requirements along the school access road and shared path currentlybeing confirmed. A ‘Lighting Layout Plan’, forming part of the drawing set at Appendix C, provides fulldetails of the proposed landscaping treatments.

Land Acquisition

No private land is being acquired.

Geology

An investigation was undertaken between 28 October to 1 November 2019, by an experiencedGeotechnical Engineer from Jacobs. The detailed findings are discussed at Appendix I ‘GroundConditions Report’.

The regional surface geology generally comprises Triassic age quartzose to feldspathic sandstone(Rqph) however parts of the duplication alignment may also intersect Permian age glaciomarineinterbedded siltstone and sandstone (Pua). Alluvial soils (Qa) may also be encountered near FaggsGully Creek.

A short section (approximately 60 m) of the southbound carriageway north of Faggs Gully Creek(Chainage 3.54 km to Chainage 3.60 km) has a landslide hazard risk of “Medium” and is a potentialsource for rock fall. The proposed design does not change the road geometry in the vicinity of any rockslope i.e. the offset between the rock slope and the road shoulder does not change. On this basis thereis no change in risk to the road user and it is considered that a detailed landslide risk assessment is notrequired.

Soil investigations do not indicate soils to be unsuitable for onsite reuse or off-site disposal to landfill.

Flora & Fauna

A Natural Value Assessment was undertaken between November 2019 and August 2020. The detailedfindings are discussed at Appendix G.

Key ecological values identified within the Assessment Buffer for the project include:

· 4.5 ha of native vegetation and 24 emergent trees. This vegetation is mostly degraded, althoughsome higher quality remnants occur in the hills on the periphery.

· One State threatened flora species; Smooth New-Holland Daisy (Vittadinia burbridgeae). Noindividual plants fall within the Construction Footprint.

· Five Commonwealth and State threatened fauna species have a moderate to high likelihood ofutilising habitat within the project area. A further two species have a moderate to high likelihoodof utilising aquatic habitat downstream of the project area. Assuming all mitigation measuresdetailed in the Natural Values Assessment are adhered to, these will not be impacted.

· Seven declared weeds species and two pest species.

Land Capability

The LIST’s Land Capability layer shows no classification of land within the project footprint.

Natural Hazards

Minor sections of the project footprint impact Landslide Hazard Areas. These impacts have beenassessed as negligible given existing conditions in these sections are not likely to differ greatly in theproposed design. Refer to Appendix I ‘Geotechnical Report’ for further assessment of landslide risk.

Historic Heritage

There are no registered historic heritage sites in close proximity to the site.

Aboriginal Heritage

As the Scheme does not consider Aboriginal heritage and the dissemination of locations of knownAboriginal heritage locations is controlled by AHT, the assessments and approval are not provided aspart of this report – they can be provided directly to Council if requested.

Noise

Based on modelling undertaken, it is predicted the traffic noise from the upgraded Highway will not beperceivably louder than the existing traffic noise. The Highway development footprint generally matches

the existing footprint and is not proposed to be significantly closer to any residential areas to the eastor west of the Highway.

The predicted traffic noise from the upgraded Highway was assessed by the Department of StateGrowth, as road authority for the Highway, against the Tasmanian State Road Traffic NoiseManagement Guidelines. The outcome of this assessment under the Guideline’s overarching principlesof reasonableness, practicality and cost-effectiveness, was that it is appropriate to proceed withoutnoise mitigation given that an imperceptible change in noise level would be considered acceptablewithout mitigation.

Appendix H ‘Road Traffic Noise Assessment’ provides details of the noise testing and predictions.

Construction

Construction of the project is planned to commence in late 2020, with a construction period expectedup to 12 months.

6.18.1 Construction Environmental Management Plan

State Growth requires all contractors to submit a Construction Environmental Management Plan(CEMP) that demonstrates compliance with best practice guidelines and relevant legislation andregulation. The CEMP must be compliant with the Department’s G10 Environmental Specification.CEMPs are reviewed and approved by the Department’s Environmental Officers who are certifiedEnvironmental Management System (EMS) Auditors, prior to site award to ensure the contractor haseffectively identified and attributed construction related environmental risks, and has the systems andprocesses in place to effectively mitigate risk and respond to and report environmental incidents andemergency scenarios.

6.18.2 Construction Traffic Management

The construction methodology and staging of the upgrade is a major consideration, given the high trafficvolumes in the project area. Due to the nature of the works, some level of disruption to traffic will beunavoidable during the construction phase of the project. The detailed design phase of the project willconsider ways in which this can be minimised. The final construction methodology and program willalso need to consider traffic management as a priority. Tenderers, as part of the tender evaluationprocess, will need to demonstrate a construction methodology and traffic management plan thatprovides minimal disruption to road users.

Construction for the project is intended to be undertaken during normal construction hours. The needto ensure minimal disruption to road users may necessitate rare overnight or Sunday works. If theseworks are required, they will generally consist of works necessary for transitional traffic arrangementsor that are unable to be undertaken during busier traffic times. All practical steps will be undertaken tominimise impacts of noise and disturbance to surrounding residents. Where possible, State Growthundertakes stakeholder engagement prior to road works through provision of advance warnings andthe like, particularly for works outside of normal hours, where local residents and regular road users areadvised in advance of such works.

Stakeholder EngagementThe Department of State Growth engaged Jacobs to conduct stakeholder engagement throughout theproject’s design phase. A formal public consultation period was undertaken from 11-25 November 2019,when multiple channels were implemented to reach a broad audience of interested and impactedstakeholders.

A Stakeholder and Community Engagement Plan (SCEP) was developed to identify the project andstakeholder engagement objectives together with a comprehensive stakeholder identification and riskanalysis. These activities informed the appropriate engagement activities and channels ofcommunication to ensure a two-way, consultative process was implemented.

Engagement activities included, but were not limited to:

· Face to face meetings with five local business owners and representatives from recreation areafacility tenants (boat club, football club, cricket club and tennis club).

· Face to face meetings with Department of Education, Clarence City Council, Lindisfarne NorthPrimary School and Metro.

· Two staffed community information and consultation sessions at the Lindisfarne AnglicanChurch Hall – over 70 attendees and 18 feedback forms were completed.

· Static unstaffed display in Clarence City Council’s foyer with roll map, information flyers andcomments forms and box, with just two feedback forms completed and submitted.

· Doorknocking adjacent residential properties and engaging with occupants (22 propertiesvisited, six direct engagements, two follow ups and information packs left with all stakeholders).

· 16 initial telephone calls and emails.

· Social Pinpoint site with markers, generated 104 comments(https://stategrowthtas.mysocialpinpoint.com/east-derwent-highway-upgrade).

· Roads Tasmania Facebook post with 186 likes, 204 comments (unfiltered) and 53 shares.

· Media release from Tasmanian Transport Minister Michael Ferguson.

· Public notice (The Mercury newspaper) announcing community engagement.

Further to the above, a dedicated project website has been live since the start of the consultationprocess in early November 2019:https://www.transport.tas.gov.au/road/projects/eastderwenthighwayupgrade

The project received overall community support, with the majority of feedback welcoming the upgrade,some noting it was long awaited. Following a thorough feedback review, clear themes emerged,including:

· Concerns around traffic congestion and if the project would result in reducing congestion,particularly for school traffic. Stakeholders queried if traffic signal phasing and management ofturn movements and slip lanes had been considered so congestion issues weren’t exacerbated.

· Support for pedestrian safety improvements, with particular focus on safety of school childrenand linkages to existing infrastructure.

· General support for the shared pedestrian and cycling path.

· Support for minimising environmental impacts, especially trees and wildlife safety.

· Concerns included impacts to amenity through noise and visual outlooks, construction impactsand consideration for future growth and development in the area – particularly the likelyDumbarton Drive extension and resulting traffic increases.

Extended one-on-one discussions were held with directly impacted residents along East DerwentHighway, which have resulted in redesigned driveway crossover locations, vastly improving safety andimproving residents’ access to Clinton Avenue/East Derwent Highway.

Other design alterations resulting from consultation are the addition of a roundabout at the Geilston BayRoad/Dumbarton intersection as a current and future traffic calming measure, enlargement andadjustment to the roundabout at Lindisfarne North Primary School, extension of the right turn storagelane at East Derwent Highway/Golf Links Road and extension of the left turn in lane at Lindisfarne NorthPrimary School.

Site PhotographsFigures 8-1 to 8-4 show photos of the existing arrangements of the key parts of the project footprint.

Figure 8-1: intersection of East Derwent Highway and Golf Links Road, facing north-west (source:www.google.com)

Figure 8-2: intersection of East Derwent Highway and Araluen Street, facing south-west (source:www.google.com)

Figure 8-3: intersection of East Derwent Highway and Clinton Street, facing north-west (source:www.google.com)

Figure 8-4: intersection of East Derwent Highway and Sugarloaf Road, facing south-east (source:www.google.com)

Planning SchemeThe project is located within the Clarence Local Government Area. The applicable Planning Scheme isthe Clarence Interim Planning Scheme 2015 and the relevant Planning Authority is the Clarence CityCouncil.

Assessment of an Application for Use or Development

Exemptions

Pursuant to Clause 6.2.3 and 6.2.4 of the Scheme, minor upgrades by the State Government of roads,including minor widening of existing carriageways, are exempt from requiring a permit under theScheme.

It is considered the proposed works do not constitute minor upgrades for the purposes of Clause 6.2.3and 6.2.4 and are therefore not exempt, hence this application has been lodged for Council’sconsideration.

Discretionary Use or Development

Pursuant to Clause 8.8.1 Council has a discretion to refuse or permit a use or development if:

(a) the use is within a use class specified in the applicable Use Table as being a use which isdiscretionary;

(b) the use or development complies with each applicable standard but relies upon a performancecriterion to do so; or

(c) it is discretionary under any other provision of the planning scheme,(d) and the use or development is not prohibited under any other provision of the planning scheme.

This proposal requires exercise of discretion as:

· some of the zones where works are occurring list the uses as discretionary,· some of the applicable zone and codes performance criteria are relied upon.

Therefore, this proposal is a ‘discretionary application’.

Determining Applications

In determining a permit application Council must have regard to Clause 8.10.1:

(a) all applicable standards and requirements in this planning scheme; and(b) any representations received pursuant to and in conformity with ss57(5) of the Act,

but in the case of the exercise of discretion, only insofar as each such matter is relevant to theparticular discretion being exercised.

In determining any discretionary aspects of the proposal Council must, in addition to 8.10.1, have regardto 8.10.2:

(a) the purpose of the applicable zone;(b) any relevant local area objective or desired future character statement for the applicable zone;(c) the purpose of any applicable code; and(d) the purpose of any applicable specific area plan.

but only insofar as each such purpose, local area object or desired future character statement isrelevant to the particular discretion being exercised.

An assessment in accordance with Clause 8.10.1 and 8.10.2 of the Scheme is provided in the remainderof Section 9 of this report.

Planning Scheme Objectives

Clause 2 of the Scheme identifies the purpose of the Scheme and discusses the Regional Land UseStrategy.

Clause 3 of the Scheme identifies the Regional and Local objectives for Infrastructure. Clause 3.0.1-Rstates the Regional Objective is to ‘to adopt a more integrated approach to planning andinfrastructure’. Clause 3.0.1-L lists no Local Objectives for Infrastructure.

Clause 8.10.3 state in determining an application for any permit the planning authority must not takeinto consideration matters referred to in clauses 2.0 and 3.0 of the planning scheme – hence thisreport supporting an application for a permit does not assess against these provisions of the Scheme.

Use Categorisation

The proposed works have two uses. The majority of the project is ‘Utilities’ use and the works withinthe School is ‘Education and occasional care’ use. The definitions for each use are specified at Clause8.2 of the Scheme:

Utilities: Use of land for utilities and infrastructure including: telecommunications; electricitygeneration; transmitting or distributing gas, oil or power; transport networks; collecting, treating,transmitting, storing or distributing water; or collecting, treating, or disposing of storm orfloodwater, sewage or sullage. Examples include an electrical sub-station or power line, gas,water or sewerage main, optic fibre main or distribution hub, pumping station, railway line,retarding basin, road, sewage treatment plant, storm or flood water drain, water storage dam andweir.

Educational and occasional care: use of land for educational or short-term care purposes.Examples include a childcare centre, day respite facility, employment training centre,kindergarten, primary school, secondary school and tertiary institution.

Pursuant to Clause 8.2.2, a use that is associated with and a subservient part of another use on thesame site will be categorised in the same use class. For example, vegetation clearing as part of a roadproject will be classified as Utilities.

Pursuant to Clause 8.2.5, if more than one use is proposed, each use that is not directly associatedwith and subservient to another use on the same site must be individually categorised into a use class.It is considered the works within the School are not directly associated with the general Highwayupgrade as the two works can occur in isolation of each other. Further, the vehicle accessway withinthe School is not considered to be a Road, pursuant to the Scheme’s definition of such, as the generalpublic will not have permanent right of passage.

Part C Zones

9.4.1 Zones impacted

The proposal impacts the following zones:

· Utilities: The Highway and extent of the Highway’s road reserve is zoned Utilities. All worksproposed in this Zone are considered to be ‘Utilities’ use – pursuant to Clause 28.2 this use isPermitted in this Zone.

· Open Space: The majority of Faggs Creek Gully and the grassed area between the Highwayand the football oval is zones Open Space. All works proposed in this Zone are considered tobe ‘Utilities’ use – pursuant to Clause 19.2 this use is Discretionary in this Zone.

· Community Purpose: The School is zoned Community Purpose. All works proposed in this Zoneare considered to be ‘Educational and occasional care’ use – pursuant to Clause 17.2 this useis Permitted in this Zone.

· General Residential: There are small sections of roadworks with minor encroachments into theGeneral Residential Zone. None of the works are in private land, only in ‘local roads’ zoned asResidential and not Utilities. As the works in the General Residential Zone are confined to minorupgrades to existing roads a detailed assessment against this Code is not considerednecessary. All works proposed in this Zone are considered to be ‘Utilities’ use – pursuant toClause 10.2 this use is Discretionary in this Zone.

Figure 9-1 illustrates the project footprint (purple outline and fill) in relation to the Scheme’s mappedZones.

Figure 9-1: Zone Map in relation to project footprint

9.4.2 Clause 28, Utilities Zone

The following works are proposed in this zone:

· Widening of Highway to allow duplication from 2 to 4 lanes of traffic· New concrete raised central median in center of Highway· New shared path on west of Highway and reinstatement of path on east· New on-road cycling lane on both sides of Highway· Reinstatement of street lights.· Removal of planted Blue Gums on western edge of Highway and reinstatement of landscaping

· New bio retention basin to manage stormwater· Alterations to following roads intersecting with Highway:

o Derwent Avenue/Golf Links Road (alteration to intersection)o School entry (alteration)o Debomfords Lane (removal)o Araluen Street (alteration)o Geilston Bay Road (removal)o Dumbarton Drive (new)o Clinton Road (relocation)o Sugarloaf Road (alteration)

All works occurring in the Utilities Zone are classified as ‘Utilities’ use.

The proposed upgrade to the Highway is a significant state and regional infrastructure utility. Theproject is consistent with the purposes of the Zone and complies with all relevant ApplicableStandards - the proposal relies on the following Performance Criteria for the Zone:

· Clause 28.3.2 Noise (use)· Clause 28.4.3 Landscaping (development)

28.1 Zone Purpose

The Utilities Zone Purpose is:

28.1.1.1 To provide land for major utilities installations and corridors.28.1.1.2 To provide for other compatible uses where they do not adversely impact on theutility.

There are no desired Local Area Objectives or Desired Future Character Statements.

28.2 Use Table

Pursuant to the Use Table at Clause 28.2, Utilities are classified as Permitted within the Zone.

28.3 Use Standards

The proposal complies with each Applicable Standard pursuant to Clause 28.3 Use Standards. Table9-1 provides an assessment against each Applicable Standard.

*Pursuant to Clause 7.5.3, compliance with Applicable Standards consists of complying with either theAcceptable Solution or the Performance Criterion for that standard.

Table 9-1: Assessment against Use Standards for works in the Utility Zone

Acceptable Solution /Performance Criteria

Compliance Statement

28.3.1 Hours of OperationA1Hours of operation of a usewithin 50 m of a residentialzone must be within 7.00am to 7.00 pm, except if:(i) for office andadministrative tasks; or(ii) a Utilities use.

Complies with Acceptable Solution

The use is Utilities and therefore excepted from the hours ofoperation for A1.

28.3.2 NoiseA1

Complies with Performance Criteria

Noise emissions measuredat the boundary of aresidential zone must notexceed the following:(a) 55dB(A) (LAeq)between the hours of 7.00am to 7.00 pm;(b) 5dB(A) above thebackground (LA90) level or40dB(A) (LAeq), whicheveris the lower, between thehours of 7.00om and 7.00am;(c) 65dB(A) (LAmax) at anytime.

P1Noise emissions measuredat the boundary of theresidential zone must notcause environmental harm.

A1 is not achieved as the noise from the existing Highway alreadyexceeds the maximum decibel limits specified by A1. The predictednoise from the upgraded Highway does not decrease the noise belowthese limits.

P1 is achieved as the predicted noise from the Highway upgrade willnot cause environmental harm to the nearby residential zones to thewest and east of the Highway.

An Acoustic Assessment at Appendix H provides a detailedassessment of predicted noise.

The Scheme defines Environmental harm as having the meaningstated in the Environmental Management and Pollution Control Act1994 (EMPC Act). Section 5(1) of the EMPC defines environmentalharm as ‘…any adverse effect on the environment (of whatever degreeor duration) and includes an environmental nuisance’.

The definition in the EMPC Act is useful, however it is a generaldefinition encompassing all environmental harm (i.e. for noise, odor,water pollution, deforestation etc.) and doesn’t provide specific criteria,such decibel limits, to assess if an adverse effect may be caused bynoise.

The Tasmanian State Road Traffic Noise Management Guidelines(Guidelines) is a Department of State Growth publication to managetraffic noise on Tasmanian Highways. The Department is the roadauthority for Highways in Tasmania and the Guidelines are endorsedby the Environmental Protection Authority (EPA) Tasmania. TheGuidelines specifically consider traffic noise in relation to nuisance andprovide corresponding decibel limits.

The Guide was used to assess environmental harm for this proposalas it is considered to provide the most informative criteria to assessroad noise. On 2 February 2020 Council’s Environmental Healthdivision stated Council agreed to using the Guidelines to inform thisacoustic assessment, including an assessment of environmental harm.

The Guide considers that:

· Noise levels below 63 dB(A) are acceptable.· Noise increases of 3 dB(A) or less will not be readily

perceptible, therefore an exceedance of 63 dB(A) by less than3 dB(A) will not necessarily result in a perceptible loss ofamenity.

That an increase of 3 dB(A) or less will not be readily perceptible isimportant to note in this project, which is upgrading an existingHighway. The key consideration is whether the change in noise will beacceptable.

As discussed in Appendix H, there are no instances of the Highway’spredicted noise in the abutting residential areas being both greater than63 dB(A) and an increase of 3 dB(A). It is therefore predicted that thatthe upgrades will not cause environmental harm.

As it is predicted that that the upgrades will not cause environmentalharm there are no noise mitigation treatments proposed.

28.3.3 External LightingA1External lighting (notincluding street lighting)within 50 m of a residentialzone must comply with allof the following:(a) be turned off between10:00 pm and 6:00 am,except for security lighting;(b) security lighting mustbe baffled to ensure theydo not cause emission oflight outside the zone.


All lighting will be street lighting and therefore excepted from theexternal lighting requirements for A1.

28.3.4 CommercialVehicle Movements

Not applicable

The proposal does not include a use which will introduce commercialvehicle movements.

28.3.5 Discretionary use Not applicable

No uses which are not directly associated with utilities are proposedon land within the Utilities Zone.

28.4 Development Standards

The proposal complies each Applicable Standard pursuant to Clause 28.4 Development Standards.Table 9-2 provides an assessment against each applicable standard.

Table 9-2 Assessment against Development Standards for works in the Utility Zone

AcceptableSolution/PerformanceCriteria


28.4.1 Building HeightA1Building height must be nomore than: 10 m.A2Building height within 10 mof a residential zone mustbe no more than 8.5 m.

Complies with Acceptable Solutions

The proposed works are no more than 8.5m in height above naturalground level and adhere to the requirements of A1 and A2.

28.4.2 SetbackObjective:To ensure that buildingsetback contributespositively to the streetscapeand does not result inunreasonable impact onresidential amenity of landin a residential zone.A1Building setback fromfrontage must be no less

Not applicable

Pursuant to the definition of ‘Buildings’ in the Act, it is considered themajority of the proposed works, i.e. roadworks, are not defined as abuilding as they are not structures.

The existing Highway directly abuts the residential zone to the east.It can be considered the Highway has a 0m setback to the residentialzone as the pedestrian footpath is within the road reserve and formspart of the Highway. This element of the design is replicated in theproposal.

than: 10 m to the frontageand 6 m to any otherboundary.A2Building setback from aresidential zone must be noless than:(a) 5 m;(b) half the height of thewall, whichever is thegreater.

The proposed upgrade works generally mimic the existing design,resulting in no significant changes to setbacks.

28.4.3 LandscapingA1Landscaping is not requiredalong the frontage of a siteif the building has nilsetback to frontage.A2Along a boundary with aresidential zonelandscaping must beprovided for a depth no lessthan: 10 m.

P1Landscaping must beprovided to satisfy all of thefollowing:(a) enhance theappearance of thedevelopment;(b) provide a range of plantheight and forms tocreate diversity, interest andamenity;(c) not create concealedentrapment spaces;(d) be consistent with anyDesired Future CharacterStatements provided for thearea.P2Along a boundary with aresidential zonelandscaping or a buildingdesign solution must beprovided to avoidunreasonable adverseimpact on the visualamenity of adjoining land ina residential zone, havingregard to the characteristicsof the site and thecharacteristics of theadjoining residentially zonesland.

Complies with Acceptable Solution (A1) and PerformanceCriteria (P2)

The proposed landscaping generally replaces vegetation in areaswhere it is required to be removed for the upgrade works to occur.

A Landscape Plan forms part of the drawing set within Appendix C,this Plan details the proposed landscape treatments.

The convergence of park, school and suburban setting, use bypedestrians and ongoing maintenance costs and work placeaccessibility have all been considered in the proposed landscapingtreatments.

The proposal complies with A1. Landscaping is proposed inlocations suitable for plantings. As per existing conditions, noplantings are proposed in the footpath to the east of the Highwaygenerally between Golf Links Road and Araluen St as there is nosetback space to allow for such.

The proposal complies with P2: Technically the proposal does notcomply with A2 as not all buffers with residential zones are able to beplanted 10m wide. The proposed landscaping shown in theLandscape Plan generally results in ‘like for like’ replacement ofvegetation, whereby resulting in no unreasonable adverse impact onthe visual amenity of adjoining land in a residential zone

28.4.4 Outdoor StorageAreas

Not applicable

No outdoor storage areas are proposed.

28.4.5 Fencing Not applicable

No fencing is proposed.

28.5 Development Standards for Subdivision

No subdivision is proposed.

9.4.3 Clause 17. Community Purpose

The following works are proposed in this Zone:

· New ‘School Access Road’ connecting the northern section of the School carpark toDebomfords Lane, including alteration to the existing roundabout and accessway to Highway.

· Removal of 5x planted Blue Gums to the north of the roundabout. Reinstatement oflandscaping as per ‘Landscaping Layout Plan’.

*The alteration to the School access from Derwent Avenue is located in the Residential Zone.

These works in the Zone are confined to the area shown as pink outline as illustrated in Figure 9.2.

Figure 9-2: Location of works within the Community Purpose Zone

All works occurring in the Community Purpose Zone are classified as ‘Educational and occasionalcare’ as the works are only associated with a private road directly associated with the School andvegetation on School grounds.

No works classified as ‘Utilities’ are occurring in this zone, hence there is no assessment of this useagainst this Zone.

The component of the project occurring in this Zone is minor. This component is consistent with thepurposes of the zone and complies with all relevant Applicable Standards by meeting the AcceptableSolutions (no Performance Criteria are relied upon).

17.1 Zone Purpose

The Community Purpose Zone Purpose is:

17.1.1.1 To provide for key community facilities and services where those facilities andservices are not appropriate for inclusion as an associated activity within another zone.17.1.1.2 To ensure land required for future public use is protected from inappropriate use ordevelopment.17.1.1.3 To encourage multipurpose, flexible and adaptable social infrastructure to respond tochanging and emerging community needs.


17.2 Use Table

Pursuant to the Use Table at Clause 17.2, Educational and occasional care are classified asPermitted within the Zone.

17.3 Use Standards

The proposal complies each Applicable Standard pursuant to Clause 17.3 Use Standards. Table 9-3provides an assessment against each applicable standard.

Table 9-3: Assessment against use standards for works in the Community Purpose Zone

17.3 Use StandardsAcceptableSolution/PerformanceCriteria


17.3.1 Hours of OperationObjective:To ensure that hours ofoperation near a residentialzone do not result inunreasonable adverseimpact onresidential amenity.

Not Applicable

The component of the project within the Community Purposezone is confined to the creation of a new small section ofSchool Access Road and alteration of an existing SchoolAccess Road. There is no change in the hours of operation ofthe school or vehicle accessway.

17.3.2 NoiseObjective:To ensure that noiseemissions near a residentialzone do not result inunreasonable adverseimpact onresidential amenity.

Not Applicable

The component of the project within the Community Purposezone is confined to the creation of a new small section ofSchool Access Road and alteration of an existing SchoolAccess Road. There is no change in the speeds or intensity ofthe vehicle accessway and therefore no noise impacts.

17.3.3 External LightingA1External lighting, other thanflood lighting of sport andrecreation facilities, within50 m of a residential zonemust comply with all of thefollowing:(a) be turned off between9:00 pm and 6:00 am,except for security lighting;(b) security lighting must bebaffled to ensure they donot cause emission of lightoutside the zone.

Not Applicable

The component of the project within the Community Purposezone proposes no new external lighting. All new and alteredstreet lighting is adjacent the area of the Zone, for the publicroads forming part of the project.

17.3.4 CommercialVehicle MovementsObjective:To ensure that commercialvehicle movements nothave unreasonable impacton residential amenity onland within a residentialzone

Not Applicable

The component of the project within the Community Purposezone is confined to the creation of a new small section ofSchool Access Road and alteration of an existing SchoolAccess Road. Any existing/future commercial vehiclemovements associated with the operation of the School will notbe impacted by the proposed works.

17.3.5 Discretionary UseObjective:To avoid thecommercialisation andprivatisation of public landintended for communityuse.

Not Applicable

The proposal will not change the existing School use on site.



Table 9-4: Assessment against development standards for works in the Community PurposeZone



17.4.1 Building HeightA1Building height must be nomore than: 10 m.A2Building height within 10 mof a residential zone mustbe no more than 8.5 m.


The proposed works are no more than 8.5m in height abovenatural ground level and therefore adheres to the requirementsof A1 and A2.

17.4.2 SetbackA1Building setback fromfrontage must be no lessthan: 10 m.A2Building setback from aresidential zone must be noless than:(a) 3 m;(b) half the height of thewall,whichever is the greater.

Not Applicable

No new works are proposed within the frontage of the Schoolsite and the site does not directly abut a residential area. Theonly works within the ‘frontage’ are the alteration to an existingschool access road.

17.4.3 DesignObjective:To ensure that buildingdesign contributes positivelyto the streetscape, theamenity and safety of thepublic and adjoining land ina residential zone.

Not Applicable

The existing design of the School building is not proposed tobe altered.

The proposed alteration to the layout of the School’saccessway will have a negligible impact to the streetscape,amenity and safety.

17.4.4 PassiveSurveillanceObjective:To ensure that buildingdesign provides for thesafety of the public.

Not Applicable

The existing design of the School building is not proposed tobe altered. The proposed works will not impact passivesurveillance.

17.4.5 LandscapingA1


Landscaping must beprovided along the frontageof a site (except whereaccess is provided) unlessthe building has nil setbackto frontage.

The area between the School site and the Highway isproposed to be landscaped with a mix of trees and shrubs,details provided in the Landscape Layout Plan with AppendixC. The majority of this landscaping is on the buffer of the Utilityand Community Purpose Zone.

17.4.6 Outdoor StorageAreas

Not Applicable

No outdoor storage areas are proposed.

17.4.7 Fencing Not Applicable


9.4.4 Clause 19. Open Space

The following works are proposed in this zone:

· Creation of new section of Dumbarton Drive from existing intersection of Geilston Bay Road/Dumbarton Drive to the Highway (immediately to the south of Faggs Creek Gully). To includeshared path and path across Creek linking to Geilston Bay Road.

· Extension of Debomfords Lane to meet new section of Dumbarton Drive, and removal of smallsection of Lane which currently accesses the Highway.

· Minor upgrade to intersection of Clinton Road and Geilston Creek Road (this intersectionpartly zoned Open Space and partly Residential). New vehicle access off Geilston Creek Roadproviding access to 328 and 330 East Derwent Highway.

· Removal of 8x emergent trees adjacent to Faggs Gully Creek to allow for the new section ofDumbarton Drive. Reinstatement of landscaping as per ‘Landscaping Layout Plan’.

· Small section of drainage works to the western side of the Highway (works locatedapproximately opposite Unit 14, 73 Clinton Rd). *The parcel of land zoned Open Space(9835/1) where these drainage works extend into is an Acquired Road, therefore it isconsidered it is intended to be used for a function of the Highway.

All works occurring in the Open Space Zone are classified as ‘Utilities’ – as the works either directlyimpact public roads or are directly associated with the changes to these roads.

The project is consistent with the purposes of the zone and complies with all relevant ApplicableStandards (no Performance Criteria are relied upon).

19.1 Zone PurposeThe Open Space Zone purpose is:

19.1.1.1 To provide land for open space purposes including for passive recreation and naturalor landscape amenity.19.1.1.2 To encourage open space networks that are linked through the provision of walkingand cycle trails.19.1.1.3 To provide for appropriate exploitation of the sand mining resource at Seven MileBeach.


19.2 Use Table

Pursuant to the Use Table at Clause 19.2, Utilities are classified as Discretionary within the Zone.However, Clause 9.2 of the Scheme establishes existing use rights as follows:

proposals for development …associated with a use class specified … as a discretionary use,must be considered as if that use class had permitted status … where the proposal fordevelopment does not establish a new use, or substantially intensify the use.

All works within the Zone are Utilities and should be considered to be permitted as follows:

· No new uses are proposed, the use of land for Utilities is existing.· The use is not being substantially intensified. The only new component of the utility is the new

extensions of Debomfords Lane and Dumbarton Drive which will not create intensification, theremainder of the works are rearrangements of existing development.

This assessment considers the effect of Clause 9.2 is that the Utilities proposed in the Open SpaceZone are considered to be a Permitted use.

19.3 Use Standards

The proposal complies each Applicable Standard pursuant to Clause 19.3 Use Standards. Table 9-5provides an assessment against each applicable standard.

Table 9-5: Assessment against use standards for works in the Open Space Zone



19.3.1 Hours of OperationObjective: To ensure thathours of operation near aresidential zone do notresult in unreasonableadverse impact onresidential amenity.

Not applicable

The only component of the project within the Open Space zone inproximity to a residential zone (the dwellings at 248 to 256 GeilstonBay Road) is the new section of Dumbarton Drive. This new sectionwill have a positive impact to residences as ‘through traffic’ will nolonger use Geilston Bay Road (which is closer to the nearbyresidences).

There are no changes to the hours of operation of this public road.

19.3.2 NoiseObjective: To ensure thatnoise emissions near aresidential zone do notresult in unreasonableadverse impact onresidential amenity.

Not applicable

The only component of the project within the Open Space zone inproximity to a residential zone (the dwellings at 248 to 256 GeilstonBay Road) is the new section of Dumbarton Drive. This new sectionwill have a positive impact for traffic noise to these residences as‘through traffic’ will no longer use Geilston Bay Road (which is closerto those residences).

There is no change in the speeds or intensity of the vehicles usingthe roads and therefore generally no change in traffic noise.

19.3.3 External LightingObjective: To ensure thatexternal lighting does nothave unreasonable impacton residential amenity on

Not applicable

The only component of the project within the Open Space zone inproximity to a residential zone (the dwellings at 248 to 256 GeilstonBay Road) is the new section of Dumbarton Drive.

land within a residentialzone.

This section will have street lights, however these will have no moreimpact than the existing lights on the streets within the residentialzones.

19.3.4 CommercialVehicle MovementsObjective: To ensure thatcommercial vehiclemovements not haveunreasonable impact onresidential amenity on landwithin a residential zone.

Not applicable

Any existing/future commercial vehicle movements will not beimpacted by the proposed works. The proposal will not generate anycommercial traffic.

19.3.5 Discretionary UseObjective: To ensure landwithin the zone is usedprimarily for purposesconsistent with ZonePurpose.

Not applicable

As discussed above, the use of Utilities as roads in the Open SpaceZone is an existing use and therefore must be considered as apermitted use.



Table 9-6: Assessment against development standards for works in the Open Space Zone



19.4.1 Building HeightA1Building height must be nomore than: 6.5 m.


The proposed works are no more than 6.5m in height above naturalground level and therefore adheres to the requirements of A1.

19.4.2 SetbackObjective: To ensure thatbuilding setback contributespositively to the streetscapeand does not result inunreasonable impact onresidential amenity of landin a residential zone.

Not Applicable

The works in the Open Space zone are generally limited to roadswhich will be buffered either side by parks, ovals, footpaths andwaterways.

19.4.3 LandscapingObjective: To ensure that asafe and attractivelandscaping treatmentenhances the appearanceof the site and if relevantprovides a visual break fromland in a residential zone.

Not Applicable

The Acceptable Solution states that landscaping must be providedwithin a frontage. There are multiple parcels of land in this Zone,however as they are not residential lots they don’t have traditional‘frontages’ and therefore an assessment against this provision is notapplicable. The below is noted with regard to landscaping:

A number of emergent trees are being removed adjacent to FaggsGully Creek to allow the new section of Dumbarton Drive andupgrade to the intersection of Geilston Bay Rd/Dumbarton Drive.

The proposed revegetation of Faggs Gully Creek is shown in theLandscaping Layout Plan, part of the Drawing set at Appendix C..

19.4.4 FencingObjective: To ensure thatfencing does not detractfrom the appearance of thesite or the locality andprovides for passivesurveillance.

Not Applicable


9.4.5 General Residential

The following portions of the alterations to existing roads/intersections/crossovers are partly located inthe General Residential Zone:

· Eastern extent of alteration to Highway and Golf Links Road, as Golf Links Road is a local roadand zoned Residential.

· Eastern extent of Araluen Street intersection alteration, as Araluen Street is a local road andzoned Residential.

· Northern extent of alteration of Dumbarton Drive and Geilston Bay Road, the majority of thisintersection is zoned Open Space.

· Eastern extent of alteration to Clinton Road and Geilston Creek Road (part of this intersectionis zoned Open Space).

· Southern section of accessway off Geilston Creek Road.· Alteration to School entry from Derwent Avenue, as Derwent Road is a local road and zoned

Residential.

All the works are confined to alterations to existing roadworks and are generally partly located in theUtility Zone – the above works represent the works at the interface with the Residential zone. Thereare no works are occurring in private land, only in local roads zoned Residential. For example, Figure9-3 illustrates the minor portion of the alteration to the intersection to Araluen Street within theResidential zone as pink outline.

Figure 9-3: Portion of alteration to Araluen Street within the Residential Zone.

As all works in the Residential Zone are alterations to existing and not establishing a new use orintensifying the use, pursuant to Clause 9.2 the Utility use must be considered as Permitted. Thisreport considers an assessment of the works against the Zone’s development standards is notapplicable as the works in the Zone are minor and the standards are not generally relevant as they

are focused on the applicability of dwellings and buildings and new non-residential development anduse.

Part D Codes

9.5.1 E1.0 Bushfire Prone Areas Code

The purpose of this Code is to ensure that use and development is appropriately designed, located,serviced, and constructed, to reduce the risk to human life and property, and the cost to thecommunity, caused by bushfires

E1.2 Application of this CodeThe code is not applicable to this assessment as it does not involve subdivision or vulnerable orhazardous uses.

9.5.2 E2.0 Potentially Contaminated Land Code

The purpose of this Code is to ensure that use or development of potentially contaminated land doesnot adversely impact on human health or the environment.

Appendix I comprises a ‘Ground Conditions Report’, prepared by Jacobs in August 2020.

The project is consistent with the purposes of the Code and complies with all relevant ApplicableStandards – the following Performance Criteria are relied upon:

· E2.5 Use Standard· E2.6.2 Development standards for Excavation

E2.2 Application of this Code

This Code applies to:

(a) a use, on potentially contaminated land, that is a sensitive use, or a use listed in a use class inTable E2.2.1 and is one of the uses specified as a qualification; or

(b) development on potentially contaminated land.

Clause E2 defines:

Potentially contaminated land: means land that is, or adjoins, land that the applicant or the planningauthority:

(a) knows to have been used for a potentially contaminating activity by reference to:(i) a notice issued in accordance with Part 5A of the Environmental Management andPollution Control Act 1994; or(ii) a previous permit ; or

(b) ought reasonably to have known was used for a potentially contaminating activity.

Potentially contaminating activity: means an activity listed in Table E2.2 as a potentially contaminatingactivity, other than an activity carried out as ancillary to a Residential use class.

Table E2.2 ‘Potentially Contaminating Activities’ includes ‘Landfill sites, including onsite wastedisposal and refuse pits’.

The Code is applicable as it is understood part of the site was a former Landfill.

E2.4 Use or Development exempt from this CodeThere are no applicable exemptions for the project.

E2.5 Use StandardsThe proposal complies with the Performance Criteria pursuant to Clause E2.5 Use Standards. Table9-7 provides an assessment against each applicable standard.

Table 9-7: Assessment against use standards for Potentially Contaminated Land Code



A1The Director, or a personapproved by the Director forthe purpose of this Code:(a) certifies that the land issuitable for the intendeduse; or(b) approves a plan tomanage contamination andassociated risk to humanhealth or the environmentthat will ensure the land issuitable for the intendeduse.

P1Land is suitable for theintended use, having regardto:(a) an environmental siteassessment thatdemonstrates there is noevidence the land iscontaminated; or(b)an environmental siteassessment thatdemonstrates that the levelof contamination does notpresent a risk to humanhealth or the environment;or(c)a plan to managecontamination andassociated risk to humanhealth or the environmentthat includes:(i) an environmental siteassessment;

A1 is not achieved. The Director (as defined in the EnvironmentalManagement and Pollution Control Act 1994, generally the Director ofthe EPA) has made no certification or approval.

P1 is achieved. Appendix I provides a detailed assessment of theproposed works with regard to potential contamination.

The proposed works meet P1 ‘b’ in that the excavation does notadversely impact on human health or the environment. Appendix I,Section 5.2.3.1 ‘Results Considering Human Health and EcologicalReceptors’ states: Based on the results of soil samples in this limitedinvestigation near the former landfill and areas to be excavated for thenew user path and roads, the risks to the health of workers andecological receptors during construction are indicated to be low.

*To adhere to P1 the proposal must adhere to either a, b or c – aproposal is not required to adhere to all.

(ii) any specific remediationand protection measuresrequired to be implementedbefore any usecommences; and(iii) a statement that theland is suitable for theintended use.

E2.6 Development standards for Excavation

The proposal complies with the Performance Criteria pursuant to Clause E2.6 DevelopmentStandards. Table 9-8 provides an assessment against each applicable standard.

Table 9-8: Assessment against development standards for Potentially Contaminated LandCode



E2.6.2 ExcavationA1No acceptable solution.P1Excavation does notadversely impact on healthand the environment,having regard to:

(a)an environmental siteassessment thatdemonstrates there is noevidence the land iscontaminated; or

(b) a plan to managecontamination andassociated risk to humanhealth and the environmentthat includes:(i) an environmental siteassessment;(ii)any specific remediationand protectionmeasures required to beimplementedbefore excavationcommences; and(iii)a statement that theexcavation does notadversely impact on humanhealth or theenvironment.

A1 is not applicable.

P1 is achieved. The proposed works meet P1 ‘b’ as follows:

b,i: Appendix I constitutes an environmental site assessment.

b,ii: Appendix I, Section 6.6 ‘Contaminated land investigation’recommends the following: …further sampling and analysis isrecommended to delineate the extent of acid sulfate soil and identifyspecific controls and mitigations. Management requirements willneed to be included as a component of a ConstructionEnvironmental Management Plan developed for the works.

b,iii: Appendix I, Section 6.6 states: Contaminant concentrations insoil sample collected near the former landfill and in areas to beexcavated (proposed shared user path and new roads at LindisfarneNorth Primary School / Geilston Bay Recreation Area) were belowthe human health and ecological guideline values for public openspace land use and ecological significance, respectively, indicating alow risk to construction worker health.

Analysed samples from the proposed area to be excavated did notexceed the EPA Tasmania IB 105 threshold for ‘Fill” material.

Further, Appendix I, Section 5.2.3.1 ‘Results Considering HumanHealth and Ecological Receptors’ states: Based on the results of soilsamples in this limited investigation near the former landfill andareas to be excavated for the new user path and roads, the risks tothe health of workers and ecological receptors during constructionare indicated to be low.

9.5.3 E3.0 Landslide Code

The purpose of this Code is to ensure that use and development is appropriately designed,located, serviced, constructed or managed to reduce to within tolerable limits the risk to human lifeand property and the cost to the community, caused by landslides.

Appendix I comprises a Ground Conditions Assessment, prepared by Jacobs in August 2020.

The project is consistent with the purpose of the Code and complies with all relevant ApplicableStandards and/or Performance Criteria.

E5.2 Application of the Code

The Code is applicable as the proposed works include development for buildings and works within aLandslide Hazard Area.

Clause E3.3 defines Landslide Hazard Area as an area shown on the planning scheme maps as alandslide hazard area, including Low, Medium And High Landslide Hazard Area.

The proposed works impact two small sections of land within a Landslide Hazard Area:

· The proposed section of works on the west most section of Geilston Bay Road impact a ‘Low’Landslide Hazard Area. This section of the proposal has a minimal overlap with the ‘Low’Landslide Hazard Area, approximately 30 sq.m. Figure 9-6 illustrates this section of theproposal, the purple hatch is the project extent and the orange hatch is the ‘Low’ LandslideHazard Area.

· The proposed section of works to the north of the intersection of East Derwent Highway andClinton Road impact a ‘Medium’ Landslide Hazard Area. This section of the proposal has aminimal overlap with the ‘Medium’ Landslide Hazard Area, approximately 35-40 sq.m. Figure9-7 illustrates this section of the proposal, the purple hatch is the project extent and the orangehatch is the ‘Medium Landslide Hazard Area.

Figure 9-4: location of works at western section of Geilston Bay road impacting LandslideHazard Area

These mapped areas are discussed in Section 2.3 Geohazards of Appendix I.

E3.6 Use Standards

The Code has two use standards, neither of which are applicable to the proposal:

· Standard E3.6.1 is applicable to Hazardous uses. Section E3.3 defines Hazardous uses asthose involving fuel sales dangerous substances. The proposed use is not hazardous as perthis definition and assessment against this Standard is not applicable.

· Standard E3.6.2 is applicable to Vulnerable uses. Section E3.3 defines Vulnerable uses asthose involving certain residential, custodial, educational, hospital and visitor accommodationuses. The proposed use is not Vulnerable as per this definition and assessment against thisStandard is not applicable.

E3.7 Development StandardsThe proposal complies with each Performance Criteria pursuant to Clause E3.7 DevelopmentStandards. Table 9-9 below table provides an assessment against each applicable standard.

Table 9-9. Assessment against development standards for Landslide Code



E3.7.1 Buildings andWorks, other than MinorExtensions

A1No acceptable solution.

P1Buildings and works mustsatisfy all of the following:(a) no part of the buildingsand works is in a High


a) No works are located within a High Landslide Hazard Area.

b) Clause E3.3 defines ‘acceptable risk’ as a risk society isprepared to accept as it is. That is; without management ortreatment.

Section 6.7 of Appendix I states “the current design…does notchange the road geometry in the vicinity of the rock slope i.e. theoffset between the rock slope and the road shoulder does notchange. On this basis there is no change in risk to the road user

Figure 9-5: Location of works north of the intersection of the Highway and Clinton Roadimpacting Landslide Hazard Area.

Landslide Hazard Area;(b) the landslide riskassociated with thebuildings and works iseither:(i) acceptable risk; or(ii)capable of feasible andeffective treatmentthrough hazardmanagement measures, soas to be tolerable risk.

and it is considered that a detailed landslide risk assessment isnot required.”

It is therefore considered the landslide risk associated with theworks is an acceptable risk.

E3.7.2 Minor Extensions N/AWorks are not a minor extension

E3.7.3 Major WorksA1No acceptable solution

P1Major works must satisfy allof the following:(a) no part of the works is ina High Landslide HazardArea;(b) the landslide riskassociated with the works iseither:(i) acceptable risk; or(ii) capable of feasible andeffective treatment throughhazard managementmeasures, soas to be tolerable risk.


Refer to assessment for E3.7.1 (the performance criteria are thesame).

*The works proposed works within the Landslide Hazard Zone wouldlikely not meet the definition of Major Works in Section E3.3, statedbelow:

major works means any of the following:(a) excavation of 100 m3 or more in cut volume;(b) excavation or soil disturbance of an area of 1,000 m2 ormore;(c) clearance of vegetation involving an area of more than1,000 m2;(d) water storages or swimming pools with a volume of45,000 litres or more.

The proposed works would not trigger ‘c’ or ‘d’, however as the exactexcavation quantities have not been finalised an assessment againstthe Major Works standard is deemed applicable.

9.5.4 E5.0 Road & Railway Assets Code

The purpose of this Code is to protect the safety and efficiency of road and railway networks and reducethe conflict between sensitive uses and major roads and the rail network.

Appendix K comprises a Traffic Impact Assessment, prepared by Jacobs in August 2020.


· E5.6.4 Sight distance at accesses, junctions and level crossings


The Code is applicable as the proposed works include:

· a new vehicle crossing or junction, and· intensifies the use of an existing access.

E5.5 Use Standards

The proposal complies each Applicable Standard pursuant to Clause E5.5 Use Standards. Table 9.10provides an assessment against each applicable standard.

Table 9-10: Assessment against use standards for Road & Railway Assets Code



E5.5.1 Existing roadaccesses and junctionsA1Vehicle movementscategory for 1 or category 2roadsA2The annual average dailytraffic (AADT) of vehiclemovements, to and from asite, using an existingaccess or junction, in anarea subject to a speed limitof more than 60km/h, mustnot increase by more than10% or 10 vehiclemovements per day,whichever is the greater.A3The annual average dailytraffic (AADT) of vehiclemovements, to and from asite, using an existingaccess or junction, in anarea subject to a speed limitof 60km/h or less, must notincrease by more than 20%or 40 vehicle movementsper day, whichever is thegreater.


A1 is not applicable as no category 1 or 2 roads are within project site.East Derwent Highway is a Category 3 road (based on the TasmanianState Road Hierarchy)

A2 and A3 are met as there is no intensification of existing use oranticipated induced demand due to upgrades to East DerwentHighway as specified in Section 3.3.

Refer to Appendix K’s Section 3.3 and 3.4 for further details.

E5.5.2 Exiting levelcrossings

Not Applicable

The rail network is not within the project site.

E5.6 Development StandardsThe proposal complies with each Applicable Standard pursuant to Clause E5.6 DevelopmentStandards. Table 9-11 provides an assessment against each applicable standard.

Table 9-11: Assessment against development standards for Road & Railway Assets Code



E5.6.1 Developmentadjacent to roads andrailwaysObjective: To ensure thatdevelopment adjacent tocategory 1 or category 2roads or the rail networkmeets certain guidelines.

Not Applicable

Not applicable as no category 1 or 2 roads are within project site. EastDerwent Highway is a Category 3 road (based on the TasmanianState Road Hierarchy)

E5.6.2 Road accesses andjunctionsA1No new access or junctionto roads in an areasubject to a speed limit ofmore than 60km/h.A2No more than one accessproviding both entry andexit, or two accessesproviding separate entryand exit, to roads in an areasubject to a speed limit of60km/h or less.

Meets Acceptable Solution

The proposed works meet the acceptable solution A1 and A2 as thereare no new accesses or junctions to roads in an area subject to aspeed limit of more than 60km/h. Note an existing intersection with thehighway is being relocated and replaced as part of the project, but isnot considered additional. Note an existing intersection with thehighway is being relocated and replaced as part of the project, but isnot considered additional.

Refer to Appendix K’s Section 3.1 for further details.

E5.6.3 New level crossingsObjective: To ensure thatthe safety and the efficiencyof the rail network

Not Applicable

The rail network is not within the project site.

E5.6.4 Sight distance ataccesses, junctions andlevel crossingsA1Sight distances at:(a) an access or junctionmust comply with the SafeIntersection Sight Distanceshown in Table E5.1; and(b)rail level crossings mustcomply with AS1742.7Manual of uniform trafficcontrol devices Railwaycrossings, StandardsAssociation of Australia.P1The design, layout andlocation of an access,junction or rail levelcrossing must provideadequatesight distances to ensurethe safe movement ofvehicles, having regard to:(a) the nature andfrequency of the trafficgenerated by the use;(b) the frequency of use ofthe road or rail network;

Meets Performance Criteria

Meets the acceptable solution A1 as all accesses and junctionsprovide sufficient sight distance between vehicles to enable safemovement of traffic, except the junctions below.

Meets the performance criteria P1 for parts f) any measures toimprove or maintain sight distance; and g) any written advice receivedfrom the road or rail authority, for the junctions of Geilston Bay Road /Dumbarton Drive and East Derwent Highway / Dumbarton Drive /Clinton Road. Refer to Section 5.3 which outlines sight distancesachieved at these junctions.

(c) any alternative access;(d) the need for the access,junction or levelcrossing;(e) any traffic impactassessment;(f) any measures to improveor maintain sightdistance; and(g) any written advicereceived from the road orrailauthority.

9.5.5 E6.0 Parking and Assets Code

The purpose of this Code is to ensure safety and efficient access to the road network for all user,ensuring sufficient parking, and that access and parking areas are designed and located to be safe toall users.

Appendix K comprises a Traffic Impact Assessment, prepared by Jacobs in August 2020.

The project is consistent with the purpose of the Code and complies with all relevant ApplicableStandards (no Performance Criteria are relied upon).


The Code is applicable as it applies to all use and development.

E6.6 Use Standards

The proposal complies with each Applicable Standard pursuant to Clause E6.6 Use Standards. Table9-12 provides an assessment against each applicable standard.

TABLE 9-12: ASSESSMENT AGAINST USE STANDARDS FOR PARKING AND ASSETS CODE



E6.6.1 Number of CarParking SpacesA1The number of onsite carparking spaces must be: noless than the numberspecified in Table E6.1

Meets the Acceptable Solution

The proposal meets the acceptable solution A1 as for ‘utility’ usethere is no parking space requirement for this use in accordance withTable E6.1. As the development itself is not expected to directlyimpact the size of the student/teacher population, nor is the existingcarpark at the school being altered, acceptable solution A1 is alsomet for “Education and occasional care” use.

Overall, there is a reduction in the available parking space along thehighway as a result of the upgrade, however, improvements areexpected due to the removal of existing no standing zones. Refer toSection 5.2.7. which outlines the parking infrastructure associatedwith the development.

E6.6.2 to E6.6.4 – Otherparking spaces

Not Applicable

Refer response to Clause E6.6.1. There is no reduction in thenumber of carparks or additional trips generated.

E6.7 Development Standards

The proposal complies with each Applicable Standard pursuant to Clause E6.7 DevelopmentStandards. Table 9-13 provides an assessment against each applicable standard.

Table 9-13: Assessment against development standards for Parking and Assets Code



E6.7.1 Number ofvehicular accessesA1The number of vehicleaccess points provided foreach road frontage must beno more than 1 or theexisting number of vehicleaccess points, whichever isthe greater.


The design meets acceptable solution A1, as the number of vehicleaccess points provided for each road frontage is unchanged.

6.7.2 Design of VehicularAccessesP1Design of vehicle accesspoints must comply with allof the following:(a) in the case of non-commercial vehicle access;the location, sight distance,width and gradient of anaccess must be designedand constructed to complywith section 3 – “AccessFacilities to OffstreetParking Areas and QueuingAreas” of AS/NZS2890.1:2004 ParkingFacilities Part 1: Offstreetcar parking;(b)in the case ofcommercial vehicle access;thelocation, sight distance,geometry and gradientof an access must bedesigned and constructedto comply with all accessdriveway provisions insection 3 “AccessDriveways and Circulation


As there are no new, additional access points as part of the works,existing access locations and footprints have been retained in theirexisting format or upgraded as far as reasonably practical within abrownfield site to achieve compliance with the relevant AustralianStandards. Acceptable solution A1 is achieved, and detailed furtherin Section 5.2. of Appendix K.

Roadways” of AS2890.22002 Parking facilities Part2: Offstreet commercialvehicle facilities.

E6.7.3 to E6.7.13 VehicularPassing Areas Along anAccess, On-Site Turning,Parking areas, Facilitiesfor Commercial Vehiclesand end of trip facilities

Not Applicable

The proposed works do not include these issues.

E6.7.14 Access to a RoadA1Access to a road must be inaccordance with therequirements of the roadauthority.


The design meets acceptable solution A1 as all access to the roadnetwork is provided appropriately and in accordance withrequirements of the road authority – these requirements arespecified in the Local Government Association (LGAT) StandardDrawings or Department of State Growth specifications. Notably,works undertaken at existing access points, may depart from thesestandards in some instances where it is not feasible or reasonablypractical to achieve them without compromising road safety designoutcomes or impacting adjacent landowners. A number of existingaccesses in the project area do not meet required standards.

Appendix I’s Section 5.2 summarises key changes to vehicular andpedestrian access onto new or existing roads, and how these eachmeet the applicable road authority’s requirements within the projectarea.

9.5.6 E7.0 Stormwater Management Code

The purpose of the Code is to ensure that stormwater disposal is managed in a way that furthers theobjectives of the State Stormwater Strategy.

Appendix J comprises a ‘Hydraulics Report’, prepared by Jacobs in August 2020.

The project is consistent with the purposes of the Code and complies with all relevant ApplicableStandards (no Performance Criteria are relied upon).

Clause E7.2 Application of the Code

This Code is applicable as it applies to development requiring management of stormwater.

Clause E7.6 Use Standards

There are no use standards for this Code.

Clause E7.7 Development Standards

The proposal complies each Applicable Standard pursuant to Clause E7.7 Development Standards.Table 9-14 provides an assessment against each applicable standard.

Table 9-14: Assessment against development standards for Stormwater Management Code



E7.7.1 StormwaterDrainage and DisposalA1Stormwater from newimpervious surfaces must bedisposed of by gravity topublic stormwaterinfrastructure.P1Stormwater from newimpervious surfaces mustbe managed by any of thefollowing:(a) disposed of onsite withsoakage devices havingregard to the suitability ofthe site, the system designand water sensitive urbandesignprinciples(b) collected for reuse onthe site;(c) disposed of to publicstormwater infrastructurevia a pump system which isdesigned, maintained andmanaged to minimise therisk of failure to thesatisfaction of the Council.


As detailed in Section 1.3 of Appendix J, any new additions to thestormwater network have been designed and graded to capture runofffrom the highway and local roads, and discharged by gravity intopublic stormwater infrastructure, which includes existing systemsand/or watercourses.

Acceptable Solution A1 is achieved.

A2A stormwater system for anew development mustincorporate water sensitiveurban design principles forthe treatment and disposalof stormwater if any of thefollowing apply:(a) the size of new

impervious area is morethan 600 m2;

(b) new car parking isprovided for more than 6cars;

(c) a subdivision is for morethan 5 lots.

P2A stormwater system for anew development mustincorporate a stormwaterdrainage system of a sizeand design sufficient toachieve the stormwaterquality and quantity targetsin accordance with theState Stormwater Strategy


The increase in impervious area for the project exceeds 600 m2. Theproject has demonstrated sufficient incorporation of WSUD principlesin the design, verified through MUSIC modelling. Please refer Section3.4 of Appendix J for further details.

Acceptable Solution A2 is satisfied.

2010, as detailed in TableE7.1 unless it is not feasibleto do so.A3A minor stormwaterdrainage system must bedesigned to comply with allof the following:(a) be able to accommodate

a storm with an ARI of20 years in the case ofnon-industrial zonedland and an ARI of 50years in the case ofindustrial zoned land,when the land servicedby the system is fullydeveloped;

(b) stormwater runoff will beno greater than pre-existing runoff or anyincrease can beaccommodated withinexisting or upgradedpublic stormwaterinfrastructure.

P3No Performance Criteria.


The upgraded minor stormwater drainage system has beendesigned to accommodate a 20 year ARI storm event (in line withthe adopted flood immunity standards in Section 2.3 of Appendix J)as far as reasonably practical. It is acknowledged in some areas,particularly at the new Geilston Bay / Dumbarton Drive roundabout,there are existing inundation issues in large flood events. The designhas aimed to maintain existing conditions in this location, and avoidworsening of existing conditions as much as possible.

Where there is an increase in pre-existing runoff that cannot beaccommodated within existing infrastructure, new or upgraded trunkdrainage systems have been recommended to cater for additionalflows. This is demonstrated by use of the existing DN1050 trunkmain along Debomfords Lane for a large section of the catchmentnorth of Golf Links Road, which is then supplemented by a newunderground network and roadside table drains to capture additionalrunoff, discharging to outlets to Faggs Gully Creek. It is noted that abioretention basin has been included in the design to detain andslow flow velocities and improve the water quality of additional flowsdischarging into the creek.

Acceptable Solution A3 is satisfied.

A4A major stormwaterdrainage system must bedesigned to accommodate astorm with an ARI of 100years.P4No Performance Criteria.


The major stormwater drainage system, including the combination ofthe minor stormwater drainage system, roads, watercourses andoverland flow paths, has been designed to accommodate a 100 yearARI storm event (in line with the adopted flood immunity standards inSection 2.3 of Appendix J) as far as reasonably practical. Asindicated in response to A2, it is recognised that there are knownexisting inundation issues within the project area, and whereverpossible the design seeks to capture and improve these issues, andto avoid worsening of existing conditions, in particular across roadsand adjacent land. Thus, Acceptable Solution A4 is satisfied.

9.5.7 E8.0 Electricity Transmission Infrastructure Protection Code

The purpose of this Code is to ensure against hazards associated with proximity to electricitytransmission infrastructure, ensure electricity transmission infrastructure projects do not adverselyaffect the safe and reliable operation of that infrastructure and maintain future opportunities forelectricity transmission infrastructure.


This Code does not apply to this application. The Code applies to development within: an ElectricityTransmission Corridor, 55m of a Communications Station and 65m of a Substation Facility.

· The northern extent of the proposed works is approximately 80m to the south of the edge of anElectricity Transmission Corridor (the 110kV Risdon to Lindisfarne transmission line, whichspans the Highway).

· The northern extent of the proposed works is approximately 350m to the south-west of aCommunication Site associated with the Substation at Sugarloaf Road, Geilston Bay.

9.5.8 E9.0 Attenuation Code

The purpose of this Code is to minimise adverse effect on the health, safety and amenity of sensitiveuse from uses with potential to cause environmental harm and minimise likelihood for sensitive use toconflict with, interfere with or constrain uses with potential to cause environmental harm.


This Code does not apply to this application. The Code applies to uses with the potential to causeenvironmental harm or sensitive uses in certain settings – the proposal is neither of these.

9.5.9 E10.0 Biodiversity Code

This code is not used in this Planning Scheme.

9.5.10 E11.0 Waterway and Coastal Protection Code

The purpose of this Code is to manage vegetation and soil disturbance in the vicinity of wetlands,watercourses and the coastline.


Appendix G comprises a ‘Natural Values Assessment, prepared by Jacobs in August 2020.


· E11.7 Development Standards for works not within a designated ‘building area’.

E11.2 Application of the Code and E11.4 Development Exempt from this Code

This Code applies as the proposed development partly impacts a Waterway and Coastal ProtectionArea.

Waterways within the project footprint

The Scheme defines Waterway and Coastal Protection Area as both the mapped ‘Waterway andCoastal Protection Area’ and within the relevant distance from a watercourse, wetland, lake or thecoast as specified in the Table E11.1 of the Scheme.

There are two waterways that flow through the project area:

i. Faggs Gully Creek and an unnamed tributary of Faggs Gully Creek. Faggs Gully Creek isthe main waterway that flows through the project area, flowing broadly east to west. It

intersects the East Derwent Highway near Geilston Bay Rad, passing under it through aculvert, before its confluence with the Derwent River.

ii. The unnamed tributary of Faggs Gully Creek flows from north to the south beforeconfluencing with Faggs Gully Creek near Dumbarton Drive.

As both these waterways are represented by the mapped ‘Waterway and Coastal Protection Area’, forthe purposes of this assessment the mapping will be taken to represent the extent of the Waterwayand Coastal Protection Area. The width of the mapped waterways is approximately 60m, whichaccords with the extents specified in Table E11.1.

Works occurring in mapped waterways

The main section of works within the mapped waterways is around Faggs Creek Gully. Figure 9-8illustrates the approximate edge of the mapped waterway Faggs Creek Gully (shown as pink dashedline) and the works occurring within, being the new section of Dumbarton Drive, the upgrade of theintersection of Dumbarton Drive/Geilston Bay Road and the new intersection of DumbartonDrive/Highway/Clinton Road.

Figure 9-8: works occurring within the approximate mapped Waterway and Coastal ProtectionArea relevant to Faggs Creek Gully.

The other section of the mapped waterway impacting the project is on the Highway between ClintonRoad and Sugarloaf Road, where the unnamed tributary intersects the Highway. Figure 9-9 illustratesthe approximate edge of the mapped waterway of the unnamed tributary (shown as pink dashed line)and the works occurring within, which are contained to general Highway duplication and stormwaterupgrades.

Figure 9-9: works occurring within the approximate mapped Waterway and Coastal ProtectionArea relevant to unnamed tributary for Faggs Creek Gully.

Works applicable to assessment under the Code

Only the works occurring in the mapped Waterway and Coastal Protection Area are applicable toassessment against the Code. However, pursuant to Clause E11.4, the following works are exemptunder this Code:

(c) development involving clearing or modification of vegetation or soil disturbance…(ii) withina private garden, public garden or park, national park or State reserved land.

Much of the mapped Waterway and Coastal Protection Area is adjacent to Faggs Gully Creekwhich is a public park. Any vegetation removal in this area is exempt from assessment againstthis Code.

(l )works within 2 m of existing infrastructure including roads, tracks, footpaths, cycle paths,drains, sewers, pipelines and telecommunications facilities for the maintenance, repair,upgrading or replacement of such infrastructure

The alteration of existing roads, footpaths, sewers and pipes are generally contained to within2m of the original location – such works are exempt from assessment against this Code.

The impact of Clause E11.4 exemptions are that technically part of the works within the Waterwayand Coastal Protection Area are exempt from assessment against the Code, and some are notexempt. As differentiating the exempt versus not exempt works is challenging (e.g. only part of theproposed culverts are within 2m of the existing infrastructure), for completeness the belowassessment against the Code’s Applicable Standards generally assesses all the works occurring inWaterway and Coastal Protection Area.

E11.6 Use Standards

There are no use standards in this code.


The proposal complies with each Applicable Standard pursuant to Clause E11.7 DevelopmentStandards. Table 9-15 provides an assessment against each applicable standard.

Table 9-15: Assessment against development standards for Waterway and Coastal ProtectionCode



E11.7.1 Buildings andWorksA1Building and works within aWaterway and CoastalProtection Area must bewithin a building area on aplan of subdivisionapproved under thisplanning scheme.Performance CriteriaP1Building and works within aWaterway and CoastalProtection Area must satisfyall of the following:(a) avoid or mitigate impacton natural values;(b)mitigate and manageadverse erosion,sedimentation and runoffimpacts on natural values;(c) avoid or mitigate impactson riparian or littoralvegetation;(d) maintain naturalstreambank and streambedcondition, (where it exists);(e)maintain instream naturalhabitat, such as fallen logs,bank overhangs, rocks andtrailing vegetation;(f)avoid significantlyimpeding natural flow anddrainage;(g) maintain fish passage(where applicable);(h) avoid landfilling ofwetlands;(i) works are undertakengenerally in accordancewith 'Wetlands andWaterways Works Manual'(DPIWE, 2003) and“Tasmanian Coastal WorksManual” (DPIPWE, Pageand Thorp, 2010), and theunnecessary use ofmachinery within

Complies with Performance Criteria (P1)

The proposal does not comply with Acceptable Solution A1 as thereis not an applicable Building Area.

Assessment against P1

The proposed works within the Waterway and Coastal ProtectionArea satisfy the requirements of P1. The project has been designedto impact the waterways to a minimal extent.

As detailed in Appendix J, construction in and around keywatercourses in the project area (i.e. for the highway culvertextension and new roundabout culvert) will occur in small, discretezones of impact to mitigate erosion and sedimentation impacts, andto maintain natural in-stream habitat as much as possible.

The below text assesses the proposal against the specificrequirements of P1:

a) Complies: The project has been designed to generally avoidnatural values in the site’s waterways where possible by minimisingworks within the vicinity of Faggs Creek Gully and the unnamedtributary of Faggs Gully Creek. Where avoidance is not possible, thebelow discussed mitigation strategies will minimise adverse impacts.

Appendix G, Section 4.3.2 considers the likelihood of impacts towetlands and waterways is low, assuming all recommendedmitigation measures are adhered to. Appendix G, Table 4.4 ‘FaggsGully Creek’ states construction of the new culvert and additionaldischarge locations is not expected to have additional impacts tonatural values along the creek outside of what has already beenassessed as lost through the Construction Footprint. Re-vegetationworks will occur along the creek line, as detailed in the landscapeplan within Appendix C.

b) Complies: Sediment, erosion, run-off and water managementcontrols will be required as part of the construction contractor’sConstruction Environmental Management Plan (CEMP). As perAppendix G, Table 4.1, mitigation measure for ‘Best practicemeasures to maintain the health of Waterways and Wetlands’ it isrecommended a condition of permit require the CEMP to include thefollowing requirements:

· There is negligible change in water quality of any waterwaycaused by the proposed works

· There is negligible reduction in suitability of fish passage throughany waterway during and following construction.

· The works do not cause ‘environmental harm’ to any waterwaythrough other means.

watercourses or wetlands isavoided.

· Revegetation of the creek line will occur following construction.· These controls, including a Sedimentation Management Plan, will

be implemented through a CEMP prior to construction.

c), d), e), g) Complies: There are minimal works occurring in thewaterway’s banks and beds within the project footprint, resulting innegligible direct impact to these features.

f) Complies: There are minimal changes proposed to the existingHighway’s vertical and horizontal geometry to ensure that existingflows can be maintained along their natural alignment. Sizing of thenew roundabout culvert has been optimised to suit the required floodimmunity criteria as well as maximise waterway area and to maintainexisting flow paths as much as possible. The bioretention basin willdetain and slow flow velocities and improve the water quality of flowsdischarging into the creek. Water Sensitive Urban Design (WSUD)elements have also been incorporated into the drainage design toreduce the impacts of peak flows and improve the water quality ofadditional runoff generated.

A WSUD assessment has been undertaken using the Model forUrban Stormwater Improvement Conceptualisation (MUSIC), anationally recognised stormwater quality modelling package, in linewith the requirements of the Scheme. Appendix J provides furtherdetails.

h) Not Applicable: There are no wetlands in the vicinity of projectfootprint.

i) Complies: It is considered the works are generally in accordancewith the 'Wetlands and Waterways Works Manual' (DPIWE, 2003)and ‘Tasmanian Coastal Works Manual’ (DPIPWE, Page and Thorp,2010). Further, the recommended mitigation strategies to beincluded (and enforced) through the CEMP will require works togenerally comply with these manuals.

A2Future Coastal RefugiaArea

Not Applicable: No works occurring in a Future Coastal RefugiaArea.

A3Potable Water Supply Area

Not Applicable: No works occurring in a Potable Water SupplyArea.

A4Development must involveno new stormwater pointdischarge into awatercourse, wetland orlake.

P4Development involving anew stormwater pointdischarge into awatercourse, wetland orlake must satisfy all of thefollowing:

Complies with Performance Criteria (P4)

The proposal does not comply with Acceptable Solution A4 as thedevelopment involves a discrete number of new discharge points.

Assessment against P4:

The proposed works within the Waterway and Coastal ProtectionArea satisfy the requirements of P4. The below text assesses theproposal against the specific requirements of P1:

a) Complies: The risk of erosion and sedimentation have beendesigned to be minimised. Appendix J (Hydraulics Report) statesthe project’s upgraded stormwater system involves new

(a) risk of erosion andsedimentation is minimised;(b) any impacts on naturalvalues likely to arise fromerosion, sedimentation andrunoff are mitigated andmanaged;(c) potential for significantadverse impact on naturalvalues is avoided.

discharge points into Faggs Gully Creek. These new outletpoints have been optimised to ensure that the additionaldischarge will be occurring in a location where scour andembankment protection as a result of the highway box culvertextension is already being implemented. Locating these newoutlets in a location where scour protection is already proposedhelps mitigate the risk of further erosion and confines dischargepoints in one location so that natural stream bed conditions canbe maintained downstream as much as possible.

b) Complies: Soil, water and erosion management and controls willbe a requirement of the construction contractor’s ConstructionEnvironmental Management Plan (CEMP). Re-vegetation worksas part of the overall landscaping plan (refer to plan withinAppendix C) will occur along the creek lines, as well as scourprotection through rock pitching and batter stabilisation, aspreviously described.

c) Complies: Appendix G (Natural Values Assessment) considersthe construction of new stormwater outlets is expected to haveminimal additional or adverse effects on existing natural valuesalong the creek, outside of what has already been assessed aslost through the construction footprint.

E11.7.2 Buildings andWorks Dependent on aCoastal Location

Not Applicable

The proposal does not include Buildings and Works Dependent on aCoastal Location

9.5.11 E13.0 Historic Heritage Code

The purpose of the Code is to recognise and protect the historic cultural heritage significance ofplaces, precincts, landscapes and areas of archaeological potential.


The Code is not relevant to the assessment. The Code applies to development involving land definedin this code as a Heritage Place or a Heritage Precinct – neither are within the project footprint.

9.5.12 E14.0 Scenic Landscapes Code


9.5.13 E15.0 Inundation Prone Areas Code

The purpose of this provision is to identify areas which are at risk of periodic or permanent inundation,manage development in areas at risk from periodic or permanent inundation, facilitate sustainabledevelopment of the coast in response to the impacts of climate change; manage development on thecoast, preclude development that will affect flood flow or be affected by flood water, or change coastaldynamics in a way detrimental to development sites or other property and provide for appropriatedevelopment dependent on a coastal location.


Clause E15.2 Application of this CodeThe Code applies to development on land in the Coastal Inundation Hazard Areas and developmenton land subject to risk of riverine flooding of 1% AEP or more.

The project footprint partially impacts land mapped as being at risk of riverine flooding of 1% AEP ormore (within the western most portion of the project in Faggs Gully Creek).

The LIST’s has multiple flooding layers, there is some inconsistency between them:

As illustrated in Figure 9-10 the mapped ‘Coastal Inundation Hazard Area’ (shown as Aqua) is notimpacting the project footprint (shown as purple).

Figure 9-10: Mapped ‘Coastal inundation hazard area’

However, as illustrated in Figure 9-11 the mapped ‘Coastal Inundation Hazard Bands 20161201’(shown as red/orange/yellow) is impacting the site (shown as purple). This data set states this area isvulnerable to a 1% AEP storm event in 2050 and inundation from mean high tide by 2100.

Figure 9-11: Mapped ‘Coastal inundation hazard bands 20161201’

As the ‘Coastal Inundation Hazard Bands 20161201’ mapped layer partially impacts the site, theCode is applicable to the proposed works in that area only.

E15.6 Use Standards

The Objective of the single use standard is to ensure that change of use involving habitable buildingsand/or habitable rooms appropriately responds to inundation risk. This standard is not applicable asthe proposal is limited to roadworks, no habitable buildings are proposed.

E15.7 Development Standards for Buildings and Works


Table 9-16: Assessment against development standards for Inundation Prone Areas Code



E15.7.1 CoastalInundation High HazardAreasObjective: To ensure thathigh risk from coastalinundation is appropriatelymanaged and takes intoaccount the use of buildings.

Not Applicable

Clause E15.3 defines Coastal Inundation High Hazard Area as: anarea forecast to be subject to 0.2 m sea level rise from the MeanHigh Tide by 2050 and a rounding up to the nearest highest 0.1 m.

There is no such area in the project footprint.

E15.7.2 CoastalInundation MediumHazard AreasObjective: To ensure thatmedium risk from coastalinundation is appropriatelymanaged and takes intoaccount the use of buildings.

Not Applicable

Clause E15.3 defines Coastal Inundation Medium Hazard Area as:an area forecast to be subject to a 1% AEP storm tide event in 2050and 0.3 m free board, and a rounding up to the nearest highest 0.1m.

The LIST’s layer ‘Coastal Inundation Hazard Bands 20161201’,which partially impacts the site, has a hazard exposure of: this areais vulnerable to a 1% AEP storm event in 2050 and inundation frommean high tide by 2100.

The project does partially impact a Medium Hazard area, howeverA1, A2 and A3 are not applicable as they relate to impacts tohabitable and other buildings. The proposed roadworks in the smallsection of Medium Hazard overlapping the project footprint pose norisk to or from inundation.

E15.7.3 CoastalInundation Low HazardAreasObjective: To ensure thatlow risk from coastalinundation is appropriatelymanaged and takes intoaccount the use ofbuildings.

Not Applicable

Clause E15.3 defines Coastal Inundation Low Hazard Area as: anarea forecast to be subject to inundation from a 1% AEP storm tideevent in 2100, the 0.3 m free board, and a rounding up to thenearest highest 0.1 m.

There is no such area in the project footprint.

E15.7.4 RiverineInundation Hazard AreasA1A new habitable buildingmust have a floor level nolower than the 1% AEP(100 yr ARI) storm eventplus 300 mm.A2An extension to an existinghabitable buildingA3The total floor area of allnon-habitable buildings,outbuildings and Class 10bbuildings under the BuildingCode of Australia, on a sitemust be no more than 60m2.

Not Applicable

A1, A2 and A3 relate to habitable buildings and other buildings. Theproposed roadworks in the small section of ‘Riverine InundationHazard Areas*’ overlapping the project footprint pose no risk to orfrom inundation.

The small area of Riverine Inundation Hazard Area is considered tobe the same area as the ‘Coastal Inundation Medium Hazard Areas’

E15.7.5 Riverine, CoastalInvestigation Area, Low,Medium, High InundationHazard Areas

Not Applicable

No works are proposed in these areas.

E15.7.6 DevelopmentDependent on a CoastalLocation

Not Applicable

There is no development dependant on a coastal location proposed.

9.5.14 E16.0 Coastal Erosion Hazard Code

The purpose of this Code is to facilitate sustainable development on coasts vulnerable toerosionidentify areas which are vulnerable to current and anticipated coastal erosion and provide fordevelopment responses that appropriately respond to coastal erosion hazard.


The project is consistent with the purpose of the Code and complies with all relevant ApplicableStandards, the following Performance Criteria are relied upon:

· P1 for E16.7.1 Buildings & Works in Coastal Erosion Hazard Area.

E16.2 Application

This Code is applicable as it involves development on land in the Coastal Erosion Hazard Area shownon the planning scheme maps. As illustrated in Figure 9-12, the western most section of works at theintersection of Dumbarton drive and Geilston Bay Road (shown as purple) are impacted by theCoastal Erosion Hazard Area (shown as brown hatch).

Figure 9-12: Works occurring in the mapped Coastal Erosion Hazard Area

E16.6 Use Standards

The Objective of the single use standard is to ensure that change of use involving habitable buildingsand/or habitable rooms appropriately responds to erosion risk. This standard is not applicable as theproposal is limited to roadworks, no habitable buildings are proposed.



Table 9-17: Assessment against development standards for Coastal Erosion Hazard Code



E16.7.1 Buildings & WorksA1No Acceptable Solution.P1Buildings and works mustsatisfy all of the following:(a) not increase the level ofrisk to the life of theusers of the site or ofhazard for adjoining ornearby properties or publicinfrastructure;(b)erosion risk arising fromwave runup,including impact andmaterial suitability, may bemitigated to an acceptablelevel throughstructural or designmethods used to avoiddamage to, or loss of,buildings or works;(c)erosion risk is mitigatedto an acceptable levelthrough measures to modifythe hazard where thesemeasures are designed andcertified by an engineer withsuitable experience incoastal, civil and/orhydraulic engineering;(d) need for futureremediation works isminimised;(e) health and safety ofpeople is not placed atrisk;(f) important naturalfeatures are adequatelyprotected;(g)public foreshore accessis not obstructed where themanaging public authorityrequires it to continue toexist;(h)access to the site will notbe lost orsubstantially compromisedby expected future

P1: Meets Performance Criteria

There is no acceptable solution, therefore reliance on thePerformance Criteria is required.

P1: AssessmentThe works impact a very small fraction of the mapped CoastalErosion Hazard Area near the confluence of Faggs Gully Creek withthe River Derwent. Although the susceptibility of this coastal area toerosion is unknown due to the uncertainty in underlying information,the area is classed as an acceptable hazard zone (all soft sedimentshores), and is landwards of likely and possible natural recessionlimits (ListMap, 2020).

Given the existing coastal hazard level is acceptable and works areoccurring in the section mapped furthest upstream along the creek(landwards of likely recession limits), the risk to life and naturalfeatures posed by erosion hazard and erosion risk from wave run-upis said to be unchanged by the proposed works. Additionally, accessto and through the area and public foreshore will not be lost,compromised or obstructed by any future coastal erosion in theworks area. The works are also not being undertaken in a knownactively mobile landform.

Erosion mitigations for flows within Faggs Gully Creek, particularlyeither side of the new waterway crossing under the Dumbarton Drive/ Geilston Bay Road roundabout, will be implemented by thedeveloper. The measures being implemented will assist in reducingdownstream erosion risk around the confluence of the creek with thecoastline, and have already been addressed in responses toDevelopment Standards for E11.0 Waterway and Coastal ProtectionCode, both through design features and implementation of a CEMP.

Based on the above, Performance Criteria P1 is satisfied.

Refer to the Appendix J Hydraulics Report for further assessment ofthe projects overall.

9.5.15 E17.0 Signs Code

The purpose of this provision is to regulate signs.

E17.4 Use or Development Exempt from this Code

The proposed works will include only Statutory Signs (signs relating to safety or guidance ofPedestrians and traffic), which are exempt from this Code pursuant to Clause E17.4.1.

9.5.16 E18.0 Wind and Solar Energy Code

This code applies to development for the purpose of electricity generation. This Code is not relevantto this proposal.

9.5.17 E19.0 Telecommunications Code

This code applies to development for telecommunication facilities. This Code is not relevant to thisproposal.

9.5.18 E20.0 Acid Sulfate Soils Code


9.5.19 E21.0 Dispersive Soils Code


9.5.20 E23.0 On-Site Wastewater Management Code

This code applies to proposals relying on onsite management of domestic wastewater from residentialuse and wastewater similar to domestic wastewater from nonpresidential use. This Code is notrelevant to this proposal.

erosion whether on theproposed site or offsite;provision of a developercontribution for required(i) mitigation worksconsistent with any adoptedCouncil Policy, prior tocommencement of works;(j) not be located on anactively mobile landform.

E16.7.2 DevelopmentDependent on a CoastalLocation

Not Applicable

There is no development dependant on a coastal location proposed.

9.5.21 E24.0 Public Art Code

The purpose of this provision is to implement the City’s Cultural Arts Plan, including the ClarencePublic Art.

E24.2 Application of the Public Art Code

The only zone applicable to this Code where works are proposed is the Open Space Zone. The worksoccurring in this Code represent a small portion of the project, limited to the new section ofDumbarton Drive and the extension to Debomfords Lane.

Pursuant to Clause E24.4, development costing less than $1M is exempt from this Code. It ispredicted the works occurring in the Open Space Zone will cost less than $1M. Therefore theproposal is exempt from assessment under this Code. This issue was discussed with Council at thepre-application meeting on 16 January 2020, minutes can be circulated to Council on request.

9.5.22 E25.0 Airport Buffer Code

This Code applies to all applications for use or development within the Airport Buffer Code. This Codeis not relevant to this proposal.

9.5.23 E26.0 Hotel Industries Code

The purpose of this Code is to provide for hotel industries, while protecting the amenity of adjacentareas. This Code is not relevant to this proposal.

9.5.24 E27.0 Natural Assets Code

The purpose of this code is to protect and conserve threatened native flora and fauna and othernative vegetation recognised as locally significant.

Appendix G comprises a Natural Values Assessment, prepared by Jacobs in August 2020.



This code applies to all use or development on land wholly or partially within a Biodiversity ProtectionArea (BPA) shown on the planning scheme maps.

Only a small section of the project footprint on the western side of the Highway (to the north-east ofthe proposed cul-de-sac at Geilston Bay Road) impacts the BPA. As illustrated in Figure 9-13, at thislocation the mapped BPA area partially overlaps the Highway road reserve (the overlapping area ishighlighted in pink).

Figure 9-13: location of mapped BPA within project footprint

*The Code is not applicable to the majority of the proposed development footprint, therefore impactsto ecology in areas outside of the mapped BPA are not assessable under this Code. These impactsare regulated and assessed under legislation other than the LUPA Act. Refer to Appendix G fordetails of ecology legislation applicable to this project.

E27.6 Impact Classification

The proposed works applicable to the Code are classified as ‘Negligible’ pursuant to the ImpactClassification at Clause E27.6. Table 9-18 provides assessment against the Negligible criteria.

Table 9-18: Assessment of Negligible Impact criteria

Negligible Impact Criteria Compliance StatementE27.6 ImpactClassificationa) No priority vegetation

will be clearedb) The construction will not

involve blasting orsignificant noise andvibration impacts

c) Is not associated withany future subdivision

The impact of works within the BPA area meet the criteria for‘Negligible’:

a) There is no priority vegetation being removed. As discussed inAppendix G, where the BPA overlaps the Construction Footprint,only FUR (Urban areas) and FPE (Permanent easements)vegetation communities are located, which are classed asmodified habitats and not native vegetation. Appendix G providesdetails of types of vegetation within and surrounding the site.

b) The proposed construction works will not require any blasting.Noise and vibration from construction works will meet therequirements of the Construction Environmental ManagementPlan and general construction guidelines.

c) There are no known future subdivisions proposed in the BPAareas within the project footprint.

E27.7 Use Standards

There is no use standard criteria for a negligible Impact, therefore assessment for use for this Code isnot applicable.


The proposal complies with each Applicable Standard pursuant to Clause E27.8 DevelopmentStandards.

Table 9-19 provides an assessment against each applicable standard.

TABLE 9-19: Assessment against development standards for Natural Assets Code



For a Major impactNot ApplicableImpact is classified as Negligible.

For a Minor impactNot ApplicableImpact is classified as Negligible.

For a Negligible impactA1

Maximum clearance of2500m2 of native vegetation


Where the BPA overlaps the Construction Footprint, the onlyvegetation impacted is classed as modified habitats rather than nativevegetation. Therefore no native vegetation within the BPA is beingcleared.

Appendix G provides further details of vegetation classifications andimpacts.

Part F Specific Area Plans

No Specific Area Plans apply to the proposed works.

Tasmanian Heritage RegisterThe project footprint does not include a place listed on the Tasmanian Heritage Register (THR).

State Policies11.1.1 State Policy on Water Quality Management 1997

The State Policy on Water Quality Management provides a framework for the development of ambientwater quality objectives and the management and regulation of sources of emissions to surface waters(including coastal waters) and groundwater.

Appendix J (Hydraulics Report) provides a detailed assessment of the proposed works in relation towater quality, discharge, drainage and stormwater. The Report identifies:

· Stormwater: The Highway upgrade design intent was to utilise the existing stormwater systemand discharge points as much as possible.

However, as the Highway upgrade will involve a large increase in impervious area due toduplication of the Highway and addition of new local roads, the adequacy of the existingstormwater capture and conveyance system required supplementing with additionalinfrastructure.

New stormwater infrastructure will be introduced to assist in capturing flows from these overlandflow paths, in particular, grated strip drains in the central median. Any new additions to thestormwater network, including kerbs and channels, pits and pipes, swales and drains, have beendesigned and graded to capture runoff from the highway and local roads, and discharged bygravity into public stormwater infrastructure, which includes existing systems and/orwatercourses.

Kerb and channel has been incorporated alongside the Highway in a number of locations, andalong the new local roads to minimise impacts on adjacent land and reduce the amount ofearthworks required in cutting drains. Due to the introduction of these hard drainage features,use of Water Sensitive Urban Design (WSUD) principles has been considered in the design toreduce impacts of increased catchment imperviousness on peak flows and water quality.

· Discharge to waterways: New local road infrastructure west of the highway and on the southernside of Faggs Gully Creek require a new discharge point(s) to the creek to be introduced toavoid a lengthy trunk drainage system connecting to an existing outlet.

New discharge points have been proposed near the downstream extension of the twin boxculvert under the highway where rock protection will be provided to prevent scour at the outlet.Locating new discharge outlets in a location where scour protection is already proposed helpsmitigate the risk of further erosion and confines discharge points in one location so that naturalstream bed conditions can be maintained downstream as much as possible.

Although there may be an opportunity to further rationalise discharge points in the DetailedDesign phase of the project, most of the new outlet points comprise relatively small catchments.

· Water quality targets: Water quality target reductions in line with the State Stormwater Strategy2010 have been adopted for the project as follows:

o 80% reduction in the annual average load of Total Suspended Solid (TSS)

o 45% reduction in the annual average load of Total Phosphorus (TP)

o 45% reduction in the annual average load of Total Nitrogen (TN)

· Bioretention Basin: The outlet with the largest catchment has also been designed to incorporatea bioretention basin upstream, which will detain and slow flow velocities and improve the waterquality of flows discharging into the creek.

· Environmental Management Plan: Construction of the road will be carried out in accordancewith an environmental management plan and/or CEMP consistent with the relevant StateGrowth specifications to prevent erosion and the pollution of streams and waterways by runofffrom sites of road construction and maintenance.

As recommended above in the report, it is proposed that any permit issued should include acondition require a CEMP to have specific controls such as that there is negligible change inwater quality of any waterway caused by the proposed works

The proposal is considered to be consistent with the State Policy.

ConclusionThis report supports a development application by the Department of State Growth to Clarence Councilfor the proposed upgrade of the East Derwent Highway.

The project will:

· make the highway wider to have four lanes of traffic – two lanes in each direction· build a new concrete raised central median and safety barrier to reduce the risk of crashes· install new traffic lights at the upgraded intersection at Clinton Road and Geilston Bay Road· build safer access off the highway to Araluen Street, Lindisfarne North Primary School and

Geilston Bay Recreation Area· add an off-road shared path and on-road cycling lanes, and· improve the left-turn pocket at the Sugarloaf Road intersection.

The purpose of this report is to assess the suitability of the proposal against Council’s Planning Scheme.

The proposal is assessed to comply with the relevant acceptable solutions and performance criteriaunder the Zones and Codes impacted. The proposal is therefore assessed to comply with therequirements of the Scheme and should be approved.

Department of State Growth

GPO Box 536Hobart TAS 7001 Australia

Phone: 1800 030 688Email: [email protected]: www.stategrowth.tas.gov.au

Documents

East Derwent Highway Upgrade Development Application