Mawson Group Centre Infrastructure Study - Progress Report No. 4

AECOM

Environment and Sustainable Development Directorate 5 November 2012

awson Group Centre Infrastructure Study - Progress Report No. 4

AECOM

Mawson Group Centre

Mawson Group Centre Infrastructure Study - Progress Report No. 4

Prepared for Environment and Sustainable Development Directorate

Prepared by AECOM Australia Pty Ltd Level 2, 60 Marcus Clarke Street, Canberra A C T 2600, Australia T +61 2 6201 3000 F +61 2 6201 3099 www.aecom.com ABN 20 093 846 925

5 November 2012

60237744

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5 November 2012

AECOM

Mawson Group Centre

Quality Information Document

Mawson Group Centre

Ref

60237744

Date

5 November 2012

Prepared by

Alek Aster-Stater, Kristen Howard, Neil Graham, Michael Jollon, Ramon Labort

Reviewed by

Julie Pearson

Revision History Authorised

Revision Date

Details

A

5-Nov-2012

draft Final Report

Julie Pearson Project Manager

34>----

B

28-Nov2012

Final Report

Julie Pearson Project Manager

(--).*------

Revision

Name/Position

,

5 November 2012

Signature

AECOM

Mawson Group Centre

Table of Contents Executive Summary Introduction 1.0 1.1 Background Scope of Works 1.2 1.3 Project Area Infrastructure Spatial Information System 2.0 2.1 Existing Digital Data • • Digital Data Return to ESDD 2.2 Existing Transport and Traffic Infrastructure 3.0 3.1 Road Access 3.1.1 Access to the Group Centre Access to the Mawson District Playing Fields 3.1.2 3.2 Traffic Volumes Intersection Analysis 3.3 Parking 3.4 Car Parking Supply and Demand 3.4.1 Car Parking Operation 3.4.2 Public Transport 3.5 Bus Stop Locations 3.5.1 Bike and Ride 3.5.2 Park and Ride 3.5.3 Walking and Cycling 3.6 Crash History 3.7 Existing Utilities Infrastructure 4.0 Stormwater 4.1 Water 4.2 Sewer 4.3 Gas 4.4 Electricity 4.5 Telecommunications 4.6 Planned and Approved Developments 5.0 2011/2012 Determined or Pending Development Applications 5.1 5.2 Lease and Development Conditions Planned and Approved Infrastructure 5.3 Proposed Development Scenario 6.0 Long Term Traffic and Transport Infrastructure 7.0 Road Traffic 7.1 Access to the Group Centre 7.1.1 Access to the Mawson District Playing Fields 7.1.2 Intersections 7.1.3 7.2 Parking Public Transport 7.3 Walking and Cycling 7.4 Long Term Utilities Infrastructure 8.0 8.1 Stormwater WSUD Opportunities 8.1.1 Opportunities for Non-potable Water 8.1.2 Water 8.2 Sewer 8.3 Gas 8.4 Electricity 8.5 Telecommunications 8.6 Stakeholder Workshop 9.0 10.0 Further Investigations Transport Infrastructure 10.1

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1 1 1 2 4 4 4 5 5 5 5 5 5 8 8 10 10 12 14 14 15 18 19 19 20 21 21 22 23 24 24 24 24 26 28 28 28 28 28 29 30 30 31 31 32 32 34 34 35 35 35 37 38 38

AECOM

Mawson Group Centre

10.2 Utilities Infrastructure Opinion of Probable Cost for Infrastructure Improvements References

11.0 12.0

Appendix A Infrastructure Maps

38 40 42 A

Appendix B Potential Development Scenario Appendix C Electricity Network Performance and Status Review Appendix D Stakeholder Workshop

List of Tables Table Table Table Table Table Table Table Table Table Table Table

1 2 3 4 5 6 7 8 9 10 11

Project inputs Level of Service (LoS) definition SIDRA results for signalised intersections SIDRA results for unsignalised intersections Parking supply, demand and utilisation Summary of DAs Proposed development scenario details Proposed development scenario key assumptions Potential upgrades for signalised intersections Potential upgrades for unsignalised intersections Opinion of probable cost for infrastructure improvements

4 6 7 7 10 24 26 26 29 29 40

Project area Territory Plan (www.actmapi.act.gov.au) Key intersections Off-street car park number code Weekday ACTION Bus Service Xpresso ACTION Bus Service Bus stops, taxi stand, park & ride, bike & ride and bicycle racks in Centre Photos of bus stop on Heard Street Park and Ride — Bike and Ride Location within the centre Walking and Cycling Facilities within the Centre Pedestrian Crossing Facilities within the Group Centre Photos of the Mawson Place shared zone Photos of main shopping centre access way off Heard Street Summary of Crash Data at Key Intersections Lake Tuggeranong stormwater harvesting scheme (ACT Non-potable Water Master Plan Study, 2012)

2 3 6 9 11 12 13 13 14 15 16 17 17 18

List of Figures Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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Mawson Group Centre

Executive Summary Shared Services Procurement (SSP) on behalf of the Environment and Sustainable Development Directorate of (ESDD) engaged AECOM Australia Pty Ltd (AECOM) to undertake an infrastructure study of the Mawson Group Centre.

The project includes a review of existing traffic and transport infrastructure, utilities infrastructure (stormwater, water, sewer, gas, electricity, and telecommunications), assessment of approved and planned infrastructure, and identification of improvements to support potential long term developments through to 2031.

Transport/ Traffic

Transport and Traffic Infrastructure Assessment

Access

Mawson Drive, Mawson Place and Heard Street provide a reasonable level of access to the group centre. On-street parking along Mawson Place creates some side friction to the vehicles using this street.

Sections 3.1, 7.1

In the short term, the informal access from Athllon drive to the playing fields overflow parking should be closed.

In the long term, access to the project area is expected to continue via Mawson Drive, Mawson Place and Heard Street. Heard Street would be expected to provide the bulk of the access due to its longer length, better connections and lack of on street parking.

Intersections Sections 3.3, 7.1

Signalised Intersections: The signalised intersections on Athllon Drive are currently nearing capacity.

Although no upgrades are envisaged in the short term, long term capacity upgrades will need to be considered. The current Levels of Service and potential upgrades are indicated below.

Athllon Drive / Mawson Drive Current Level of Service (AM/PM): D/D Potential required long-term upgrades lengthening right turn lanes on Athllon Drive • left turn lane on southbound Athllon Drive constructing • lengthening right turn lanes on westbound Mawson Drive • Athllon Drive / Beasley Street Current Level of Service (AM/PM): D/C Potential required long-term upgrades: N.A. Unsignalised Intersections: Unsignalised intersections are performing satisfactorily, although there is a capacity concern at one location. The current delays and potential long term upgrades are indicated below.

Mawson Drive / Heard Street Current average delay (AM/PM): 5 s / 10 s Potential required long-term upgrades signalisation, widening of approach from Heard Street, and • adjustments to intersection layout Mawson Drive /Wilkins Street Current average delay (AM/PM): 7 s / 9 s Potential required long-term upgrades: N.A. Heard Street / Wilkins Street Current average delay (AM/PM): 5 s / 9 s Potential required long-term upgrades: N.A. N/A Wilkins Street / Beasley Street delay (AM/PM): 7 s / 8 s Current average Potential required long-term upgrades: N.A. -

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Transport/ Traffic

Transport and Traffic Infrastructure Assessment N/A Heard Street / Mawson Place delay (AM/PM): Current 4 average s/6s Potential required long-term upgrades: N.A. Mawson Drive / Mawson Place N/A delay (AM/PM): Current 4 s/6 s average N.A. Potential required long-term upgrades: -

Parkn i gSeco tins 3.4, 7.2

Current car parking, at 66% maximum utilisation for the days surveyed, is operating within overall capacity. Demand can peak sharply when Saturday morning sport is occurring. During these times, finding a car park may require additional walking distances. There may be a need to optimise the allocation and location of parking restrictions.

No short term parking upgrades are envisaged.

In the long term, parking for all new developments will need to be supplied in accordance with the Parking and Vehicle Access General Code, which stipulates number, location and design for car parks required for development approval. It is expected that redevelopment plans will be required to replace existing parking in addition to accommodating their own uses on site.

Public Transport Sections 3.5, 7.3

The Group Centre is serviced by various weekday routes, including Blue rapid (300 series) service, local coverage, and Xpresso peak hour service.

Stops are available within the Group Centre at various locations as well as park and ride and bike and ride facilities. Bus stops for local coverage services are not well-integrated with stops for the Blue Rapid (300 series).

In the short term, consideration should be given to relocating (or installing additional) local bus stops on Mawson Drive and Beasley Street closer to Blue Rapid stops on Athllon Drive.

Current services, routing and stop locations are appropriate for additional development, however, capacity would have to be assessed further as development is planned and implemented.

Walking and Cycling Network Sections 3.6, 7.4

The Group Centre and surrounding roads are generally well provided with foot paths, shared paths and bicycle facilities. There are four zebra crossings within the retail sector of the Group Centre. There is no zebra crossing connecting shops on the west side of Mawson Place to the rest of the shopping centre. The playing fields to the south also separate the southern residences of Farrer from the group centre as there is only one formal path to the east of the fields providing access between Farrer and the centre in addition to the paths on Heard Street.

In the short term, consideration should be given to installing pedestrian crossing facilities on Mawson Place, and extending the shared path leading from the underpass at Beasley Street through the playing fields to the Group Centre.

In the long term, it is not foreseen that additional pedestrian or cycling facilities would be needed to serve the proposed development scenario.

Utility Service (Asset Owner) Stormwater TaMS) Sections 4.1, 8.1

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Utilities Infrastructure Assessment The proposed developments are generally not expected to impact the level of service from the existing infrastructure across the study area, with the exception of drainage network downstream of Section 34 (refer Figure 2).

Existing uncertainties around the level of service achieved by existing

AECOM

Utility Service (Asset Owner)

Mawson Group Centre

Utilities Infrastructure Assessment infrastructure will also need to be investigated (along Heard Street, and near intersection of Beasley St and Wilkins St).

There is also the outstanding issue of scour and stability of the major floodway to the West of the Group Centre which has a history of significant flood damages. The current Woden Basin study and design work being progressed should contribute to alleviating the problem.

Stormwater Quality Management and WSUD (TaMS)

The proposed developments are not expected to detrimentally impact the stormwater quality leaving the site. It is important to note however that the Mawson Group Centre is currently not compliant with the ACT regulatory framework for stornnwater quality management. Every effort should be made to rectify this situation.

Sections 4.1, 8.1

Water (ActewAGL) Sections 4.2, 8.2

Sewer (ActewAGL) Sections 4.3, 8.3

Gas (Jemena)

The project area is classified as a Group Centre and therefore will have a minimum fire risk type of F4 (60 L/s) in accordance with Table 2-2 of AWSSS. This necessitates that any existing 100 mm diameter reticulation mains will need to be upgraded to a minimum of 150 mm diameter to meet current standards.

The proposed development will likely strain the capacity of the existing reticulation sewers in the project area. Some of the 150 mm and 225 mm diameter mains (100 m —200 m) may require upgrading depending on the final development yield.

The trunk main north of the Mawson Group Centre does not have sufficient capacity to service the proposed developments. Approximately 375 m of the 300 mm diameter main and 340 mm of the 375 mm diameter main will require upgrading to 375 mm and 450 mm diameter mains respectively.

The existing gas infrastructure has sufficient capacity to service the proposed developments. Some minor relocations or extensions may be required in some areas depending on the layout of the final development.

Sections 4.4, 8.4

Electricity (ActewAGL)

The existing feeders have spare capacity to service the initial stages of the development. Future planned network configuration will provide further capacity.

Sections 4.5, 8.5

Telecommunications Sections 4.6, 8.6

5 November 2012

ICON, Optus, Telstra and TransACT have infrastructure within or adjacent to the project area. All have sufficient capacity to provide additional service to the proposed development, and will assess the requirements on a case by case basis.

Mawson is part of the three year NBN roll out plan for the Kambah Fibre Serving Area. The proposed development is likely to impact on the NBN roll out.

AECOM

Mawson Group Centre

1.0

Introduction

1.1

Background

Shared Services Procurement (SSP) on behalf of the Environment and Sustainable Development Directorate of (ESDD) engaged AECOM Australia Pty Ltd (AECOM) to undertake an infrastructure study of the Mawson Group Centre.

The project inch:ides a review of existing traffic and transport infrastructure; utilities infrastructure (stormwater, water, sewer, gas, electricity, and telecommunications), assessment of approved and planned infrastructure, and identification of improvements to support potential developments through 2031. Opportunities for green infrastructure, such as water sensitive urban design (VVSUD) measures have also been explored as part of this project. Four Progress reports have been prepared for the project: -

Progress Report No. 1 provided an assessment of the existing infrastructure located within the project area.

-

Progress Reports No. 2 and 3 expanded upon the information contained in Progress Report No. 1, and were used internally by ESDD for input into the Mawson Group Centre Master Plan.

-

1.2

This Progress Report (No. 4) provides an assessment of the impact of planned and approved development on existing infrastructure. It also estimates a maximum level of development in the long term (2031) and associated infrastructure improvements and construction cost estimates.

Progress Report No. 4 will be used as an input into development of the Master Plan currently being prepared by ESDD.

Scope of Works

This study includes a review of existing traffic and transport infrastructure, utilities infrastructure, as well as the ability of this infrastructure to cater for development in the long term.

Utilities Services Infrastructure: -

Water Sewer Stormwater Gas Electricity Telecommunications

Transport and Traffic Infrastructure: -

Roads Intersections Traffic signals Car parking Pedestrian and cycle path networks

Infrastructure improvements within the Group Centre will need to be consistent with existing policies and standards. This will be reviewed in later stages of the project. Policies and standards include, but are not limited to: -

ACT Planning Strategy, 26 June 2012.

-

Environment Protection and Biodiversity Conservation Act, 1999 (Commonwealth).

-

Planning and Development Act, 2007 (ACT).

-

Sustainable Transport Plan, 2004.

-

Waterways Water Sensitive Urban Design (WSUD) — ACT Planning and Land Authority (ACTPLA) — 10 July 2009.

-

Water Supply and Sewerage Standards — Actew.

Design Standards for Urban Infrastructure — Territory and Municipal Services (TaMS).

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Mawson Group Centre

-

AS/NZS 2890:2004 Parking facilities.

-

Parking and Vehicular Access General Code, December 2010.

1.3

Project Area

The Mawson Group Centre is located to the southeast of the Athllon Drive/ Mawson Drive intersection.

The project area (denoted by an orange dashed line in Figure 1) is bounded by Mawson Drive on the north, Wilkins Street On the east, Beasley Street on the south, and Athllon Drive on the west.

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Figure 1

P r o j e c t area

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Mawson Group Centre

The blocks located within the project area include: -

Section 34 - Blocks 1, 2, 3, 4, 6, 7, 8, 9, and 10 Section 46 - Blocks 1,2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 17, 18, 19, 23, 25, and 26 Section 47 - Blocks 1,2, 3,8, 10, 12, 13, 14, 17, 18, 20, 21, 22, 23, 24, and 25 Section 57 - Blocks 1, 2, 5, 6, 8, 9, and 10

A significant north-south longitudinal element of this area is the stormwater floOdway which exfends across the project area from Beasley Street to Mawson Drive.

Beasley Street Figure 2

Territory Plan (www.actmapi.act.gov.au)

The core of the Group Centre is primarily CZ1 (Core Zone), CZ2 (Business Zone), and CZ3 (Services), Other zonings located within the project area include TSZ2 (Services), RZ4 (Medium Density Residential), PRZ1 (Urban Open Space), and RZ1 (Suburban).

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4

Mawson Group Centre

2.0

Infrastructure Spatial Information System

2.1

Existing Digital Data

AECOM contacted government agencies and utility service authorities regarding this study. Requests were made for the supply of both Geographic Information System (GIS) data and utilities advice for input into the project. Table 1 provides an overview of the project inputs that were received and are referenced within this report. This data was presumed accurate and up to date at the time it was received.

Table 1

Project inputs

Utility Service

Asset Owner. Operator

GIS Data

Advice

.

Stormwater

Territory and Municipal Services Directorate (TaMSD)

Water

ActewAGL

Sewer

ActewAGL

-â– 1

.Ni

Electricity

ActewAGL

Gas

Jemena

4 4

4 4

Telecommunications

AAPT

Ni

Telecommunications

ICON

4

Telecommunications

NBN

NI

Telecommunications

Optus

Telecommunications

Telstra

Telecommunications

TransACT

Traffic and Transport

Roads ACT

4 4 4 4

â– /

Telecommunications Historically, corporate policies have prevented telecommunication providers from supplying GIS data for inclusion in infrastructure studies. However, AAPT, ICON, NBN, Optus, Telstra and TransACT have provided a broad overview of their assets and servicing advice.

2.2

Digital Data Return to ESDD

The digital information which is both collated and produced by AECOM during the study will be provided to ESDD in the format of geodatabases. These geodatabases include all relevant data relating to approved and planned infrastructure and the short, medium and long term needs assessed at the project's overall objective. The information has been divided into different layers and, where possible, attribute tables have been populated with applicable information.

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AECOM

Mawson Group Centre

3.0

5

Existing Transport and Traffic Infrastructure

An overall summary of the key transport features in and around the Mawson study area is provided in Figure M2, Appendix A. A discussion of various aspects of the existing transport system is included in the following sections.

3.1

Road Access

3.1.1

Access to the Group Centre

Access to the Group Centre is via Mawson Drive and Wilkins Street. Mawson Drive, Mawson Place and Heard Street provide direct access. These streets provide a reasonable level of access to the Group Centre. On-street parking along Mawson Place creates some side friction to the vehicles using this street. This slows the speed of traffic on the street and essentially limits its use to vehicles accessing car parks associated with the centre. This street also provides service access to a number of shops within the Group Centre.

3.1.2

Access to the Mawson District Playing Fields

Vehicle access to the playing fields is provided through car parks on Beasley Street, Mawson Place and Heard Street. There is also some on-street parking on these streets. There is overflow parking in the southwest quadrant of the playing fields. This parking can be accessed via the Beasley Street car park, but is also accessed illegally via Athllon Drive, an arterial road. The playing fields are easily accessed by active modes through the network of shared paths, footpaths and pedestrian crossings.

3.2

Traffic Volumes

Eight key intersections have been identified within the Mawson Group Centre. These are highlighted in Figure 3, by type of traffic control. Existing peak hour traffic volumes were provided from the following sources: -

SCATS data was available from Roads ACT for the week 14 to 20 November 2012 at the two (2) signalised intersections.

-

Traffic counts were conducted for this study on both 1 and 2 March 2012 (Thursday and Friday) at the six (6) unsignalised intersections.

This data was used to analyse the performance of the nine key intersections.

3.3

Intersection Analysis

A peak hour SIDRA analysis was undertaken for eight (8) key intersections located within the Mawson Group Centre; this included two signalised and six (6) unsignalised intersections. Signalised and unsignalised intersections are ranked according to a Level of Service (LoS) scale as described in Table 2.

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Mawson Group Centre

Signalised intersection Roundabout Priority intersection

Beasley Street

Figure 3

Key intersections

Table 2

Level o f Service (LOS) definition

1 Average Delay / Vehicle i (secs / veh)

LoS

'

Traffic . Signals, Roundabouts

A

Less than 14

Good Operation

B

15 to 28

Good with acceptable delays and spare capacity

C

29 to 42

Satisfactory

D

43 to 56

Operating near capacity

E

57 to 70

At capacity; at signals incidents will cause excessive dela s

F

>70

Roundabouts require other control mode

Source: Guide to Traffic Generation Developments, RTA, 2002

The results of the SIDRA analysis for all 9 intersections are summarised in Table 3 and Table 4.

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AECOM

Table 3

7

Mawson Group Centre

SIDRA results f o r signalised intersections

AM Peak Intersection

Lo ' Athllon Drive / Mawson Drive

Overall

Overall Averag e Delay (sec) 46.5

Comment

-

-

PM Peak -

' Averag 1 Lo He Delay S 50.6

Athllon Drive - northbound 400 m queue, right turn exceeds queue capacity Mawson Dr WB Right turn exceeds queue capacity

Comment

-

-

-

Athllon Drive / Beasley Street

Table 4

49.1

-

Athllon Dr southbound 450 m queue, Right turn exceeds queue capacity

39.5

Athllon Dr northbound 460 m queue, right turn nearing queue capacity

Athllon Dr southbound 550 m queue, Right turn exceeds queue capacity Mawson Dr westbound Right turn exceeds queue capacity Athllon Dr northbound Right turn exceeds queue capacity

SIDRA results f o r unsignalised intersections

Intersection

AM Peak --- - - - -, Overall Average Comment Delay (sec)

Mawson Drive / Heard Street

5.0

-

Mawson Drive / Wilkins Street

7.2

-

Heard Street / Wilkins Street

5.4

-

Wilkins Street / Beasley Street

6.8

-

Heard Street/ Mawson Place

4.1

-

Mawson Drive / Mawson Place

3.7

-

Mawson Drive eastbound Right turn queue exceeds ca acit

Beasley St westbound Right turn queue exceeds ca acit

, -

Overall Average Delay (sec)

PM Peak _ Comment

9.9

-

Heard St northbound right turn queue reaches pedestrian crossing

9.4

-

Mawson Dr eastbound Right turn queue exceeds ca acit

9.4

-

7.5

-

5.8

-

6.3

-

Note: SIDRA does not compute overall LoS for sign-controlled intersections of major and minor roads

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Beasley St westbound Right turn queue exceeds ca acit

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Mawson Group Centre

8

The SIDRA analysis indicates that the intersection of Athllon Drive and Mawson Drive operates at near capacity at level of service "D" in both the AM and PM peak hours. Long queues are experienced northbound in the morning (400 m), and southbound (550 m) in the evening. Right turn queues exceed storage capacity on Athllon Drive and Mawson Drive during morning and evening peaks.

The Athllon Drive I Beasley Street intersection operates at near capacity at level of service "D" in the AM peak and a satisfactory level of service "C" in the PM peak. Long queues of approximately 450 m are experienced northbound in the morning, and southbound in the evening. Right turn queues are nearing storage capacity on Athllon Drive.

Unsignalised intersections are performing satisfactorily, although there are concerns with storage capacity in two locations. On Mawson Drive, the right turn traffic into Wilkins Street exceeds storage capacity in the median. On Beasley Street, the right turn traffic into Wilkins Street exceeds storage capacity.

Car parking manoeuvring (into and out of ninety degree spaces) often causes queuing in the aisles which can impact the intersection of Mawson Place with the car park accesses. This intersection may also become blocked temporarily at these times.

3.4

Parking

3.4.1

Car Parking Supply and Demand

There are some 937 parking spaces within the retail precinct of which 53 are on private land (at Mawson Club). There is a small amount of additional private parking but this is generally not available to the general public.

The car parks in the vicinity of the Group Centre were surveyed on: -

A public service pay day Thursday morning — 10:30 am, 11:00 am and 11:30 am on Thursday, 01 March 2012

-

A public service pay week Friday evening — 5:30 pm, 6:00 pm and 6:30 pm on Friday, 02 March 2012

-

A public service pay week Saturday morning — 10:30 am, 11:00 am and 11:30 am on Saturday, 03 March 2012

These times were assessed as the peaks for various activities which occur at this Group Centre.

There is some peak overlap between activities, most notably on a Saturday morning between weekend sports and weekly supermarket shopping. This should have been most notable in car parks #4 and #5, as defined in Figure 4. However, car park #5 was not well utilised on Saturday morning, due to the timing of the surveys being in the break between summer and winter sports.

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Mawson Group Centre

AECOM

M 1 ' 1 4 1 5 0 1 1

Mawson

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Figure 4

Off-street car park number code

Table 5 provides a summary of total parking supply and demand in the Group Centre, broken down by different categories of parking and time of day. It shows that the peak utilisation of car parks in the Centre is 66%. The maximum utilisation of short-stay parking is much higher (93%).

A description of the parking characteristics for the main car parks in Mawson follows: -

Car park #1 (Park n Ride) has 154 non-time limited spaces and is mainly used by persons who park and ride on ACTION bus services. Typically it is close to full. At 11.30 on the Thursday when surveyed it was at 84% capacity.

-

Car park #2 is a short-stay car park for the Centre.

-

Car park #3 is parking at the service station.

-

Car park #4 (Woolworths car park) has 244 short stay spaces and is the closest car park to the major supermarket, Woolworths. It is heavily utilised and peaks at 95% on Saturday morning.

-

Car park #5 (Workers and Oval car park) has 126 non-time limited spaces at 36.5% capacity during the weekday and at 19% capacity on Saturday morning. There were apparently no sporting events occurring during the survey period.

-

Car park #6 is primarily for the nearby tennis courts.

-

Car park #7 is a club car park.

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AECOM

Table 5

10

Mawson Group Centre

Parking supply, demand and utilisation

Parking Supply & Demand

1 Long Term

Total

38

432

467

937

Thurs 10:30

18

304

272

594

Thurs 11:00

25

320

277

622

Thurs 11:30

17

284

287

588

Fri 17:30

20

324

' 198

542

Fri 18:00

20

293

175

488

Fri 18:30

20

280

146

446

Sat 10:30

25

341

64

430

Sat 11:00

25

378

72

475

Sat 11:30

24

401

83

508

25

401

287

622

66%

93%

62%

66%

Parking Supply: Parking Demand

Restricted/Disabled Short Term

Maximum Demand Maximum Utilisation (%)

-

Car park #8 (Clubs and workers car park) has 128 spaces of which 100 spaces have no time limit. The usage of this car park peaks on a Friday night at 98% (effectively 100% as only the disabled parking was available) which is due to its close proximity to a number of clubs. It is also well utilised during the week day as overflow to the shopper demand and worker parking.

-

Car park #9 (Retail centre) has 131 spaces all of which carry some restriction on use by time or activity. Its peak use is Saturday morning when it has 102% utilisation (illegally parked cars take this usage over 100%).

On Friday nights, the overlap of evening Club demand and after work supermarket shopping can put additional pressure on car park 8 and 9. Additional parking is available at increased walking distances.

In summary, car parking at this Group Centre was operating within overall capacity at the time of surveys. However, it appears from the data that there was no Saturday morning sport occurring.

Anecdotally, it is known that there is much greater pressure on the car parking on a Saturday morning when there are sporting events coinciding with Saturday morning supermarket shopping. It is likely that there is adequate parking in total but the demand may result in additional walking distances for access to some car parks. There may be a need to optimise the allocation and location of various restrictions or non-restrictions within a very good supply of parking.

3.4.2

Car Parking Operation

Car parking manoeuvring (parking and unparking into the ninety degree parking) within car park #4 together with the use of the zebra crossing leading into the Woolworths supermarket often causes queuing in the aisles which can impact on the operation of the intersection of Mawson Place with the car park access. This intersection may also become blocked temporarily at these times.

3.5

Public Transport

The Group Centre is serviced by various weekday bus routes. Blue rapid (300 series) services travel along Athllon Drive, linking Mawson with Tuggeranong, Woden, City and Belconnen. Suburban

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Mawson Group Centre

11

coverage routes (21, 22, 23 and 24) travel along Heard Street and Wilkins Street as shown in Figure 5. Xpresso route 720 also services the Group Centre as shown in Figure 6.

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Figure 5

Weekday ACTION Bus Service

5 November 2012

Mawson

Legend Bus Route Bus Stop (guide only1 Blue Rapid Bus Buule Boute Nt.1111( Educational Institution Shopping Centre Hospital Bicycle Locker Park & RkIe

0

AECOM

12

Mawson Group Centre

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3.5.1

Xpresso ACTION Bus Service

Bus Stop Locations

Bus stops are available within the Group Centre at various locations, as indicated by the white dots on the route maps. Figure 7 shows the location of bus stops close to the main shopping centre, as well as taxi and bicycle storage facilities. At Athllon Drive's intersections with Mawson Drive and Beasley Street, bus stops for local coverage services (21, 22, 23 and 24) are not well-integrated with stops for the Blue Rapid (300 series). Photos of the Heard Street bus stop are included in Figure 8.

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Mawson Group Centre

13

TaMS advise that the inbound stop on Athllon Drive is a part of the major stops upgrade program, with improvement works currently underway.

Figure 7

Bus stops, taxi stand, park & ride, bike & ride and bicycle racks in Centre

Figure 8

Photos of bus stop on Heard Street

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14

Mawson Group Centre

3.5.2

Bike and Ride

Bike lockers are available at the corner of Athllon Drive and Mawson Drive associated with the Park and Ride facility. A bike cage was also opened at this location in early 2012.

Park and Ride

3.5.3

A Park and Ride facility is available at the corner of Athllon Drive and Mawson Drive as illustrated in Figure 9. The site was expanded in 2011 to accommodate more vehicles in the Park and Ride car park as the initial parking supply was inadequate for the demand for long stay and Park and Ride parking at this location. The current level of parking supply meets the demand most of the time, although it has been sighted at full capacity typically on a Tuesday and Wednesday. TaMS advise that half of this area will become a permit zone in the future. This and a proposal for an additional Park and Ride site on Athllon Drive (Wanniassa) may reduce pressure on this site.

LyonS Melrose Dr' opens late 2011'

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Figure 9

Park and Ride — Bike and Ride Location within the centre

5 November 2012

J2-4

Mawson Park & Ride Athllon Dr Bike Cage ,opens late 2011

Mawson Group Centre

AECOM

15

Walking and Cycling

3.6

Athllon Drive is well provided with on road cycle lanes as well as off - road shared paths. Mawson Drive is provided with foot paths; however cycle lanes are not available on the road. Beasley Street doesn't have any on - road or off - road cycle lanes, however a foot path is provided on the southern side of the road. On Wilkins Street and Heard Street pedestrians are well serviced by foot paths, however no on - road or off - road cycle lanes are provided on these roads. An off - road shared path exists to connect Heard Street to Beasley Street as shown in Figure 10. .c t.1)• it ONII

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Source: The A C T Walking and Cycling Map Figure 10

W a l k i n g a n d C y c l i n g Facilities w i t h i n t h e Centre

Existing pedestrian crossing facilities within Mawson Group Centre are shown in Figure 11. This also highlights key pedestrian desire lines.

There are four zebra crossings within the retail sector of the Group Centre. There is no zebra crossing connecting shops on the west side of Mawson Place to the rest of the shopping centre.

The stormwater channel to the west of the study area provides a considerable pedestrian and cycle barrier although there are a number of informal crossings. These crossings connect to several laneways emanating from Batchelor Street in Torrens. These crossings would become impassable during heavy rain.

The playing fields to the south also separate the southern residences of Farrer from the Group Centre as there is only one formal path to the east of the fields providing access between Farrer and the Group Centre in addition to the paths on Heard Street. There is evidence of informal paths through the playing fields, linking to the zebra crossing on Mawson Place.

5 November 2012

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Mawson Group Centre

LEGEND I i

Ems •

Shared zone Zebra crossing

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16

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F i g u r e 11

Pedestrian C r o s s i n g Facilities w i t h i n the G r o u p Centre

Pedestrian crossing facilities are provided on Athllon Drive at the two signalised intersections with Mawson Drive and Beasley Street. Two pedestrian crossings are located on the northern section of Heard Street at the car park. On Beasley Street, an underpass is available to connect Farrer residents to the Group Centre as well as a pedestrian refuge at the Wilkins Street / Beasley Street intersection.

However no pedestrian crossing facilities are provided on Wilkins Street. On Mawson Place, a pedestrian crossing is provided to connect the sport oval to the Woolworths car park.

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Mawson Group Centre

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17

One of the unique aspects of this Group Centre is the provision of a shared zone at the southern interface between the shopping centre and the Woolworths car park. Some photos of the shared zone are provided in Figure 12. The operation of the shared zone is dependent on the signage at main entrances off Mawson Place and Heard Street, but there is no warning for drivers that enter the car park at other locations. The shared zone would be more evident to visitors to the Group Centre if a different pavement texture and colour were used.

Heard Street Entrance Figure 12

Mawson Place Entrance

Photos of the Mawson Place shared zone

The access to the shops from the main car park on Heard Street is busier, but there is no shared zone there. This could be because of the complexity created by short-stay parking and loading zones adjacent to the shop entrances (see Figure 13).

Figure 13

Photos of main shopping centre access way off Heard Street

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3.7

Mawson Group Centre

18

Crash History

Recorded crashes for the recent five year period from January 2006 until December 2010 were obtained from Roads ACT. The three intersections with the highest number of crashes in the study area are highlighted in Figure 14. The majority of crashes occurred at the two major signalised intersections on Athllon Drive. A substantial number of crashes have also occurred at the two intersections accessing the Group Centre from Mawson Drive — 37 crashes at Heard Street and 29 crashes at Mawson Place, including two injury crashes at the latter location. Crashes at other locations generally averaged less than 2 per year (i.e., less than 10 crashes in the 5 year period).

Total 37 crashes 50% right angle

Total 68 crashes 60% rear end 5 injuries

Figure 14

Summary of Crash Data at Key Intersections

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Mawson Group Centre

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4.0

Existing Utilities Infrastructure

4.1

Stormwater

19

The Mawson Group Centre is located along the drainage corridor of a catchment that extends over a significant part of the Canberra's southern suburbs, including parts of or all of the following suburbs: -

Torrens

-

Mawson

.

Farrer

Sub-catchments generally extend to the south and west of the Group Centre.

Stornnwater infrastructure within Mawson includes both minor and major systems. The minor system (pipes, pits, kerbs, swales, etc.) was likely designed for a 10 year ARI. The major system (overland flow, floodway, retarding basins, etc.) is designed to ensure flows up to 100 year ARI do not encroach upon private leases.

High level assessment of the Territory Plan for the project area reveals that the site is approximately 43% impervious with large areas considered undeveloped or generally permeable (such as sportsgrounds).

Stormwater infrastructure located within the Mawson Group Centre is illustrated in Figure M3, Appendix A.

Stormwater Infrastructure — Minor System It is considered that Mawson Group Centre was designed in accordance with the relevant TaMS DSUI standards and therefore dimensioned to provide flow capacity up to 10 year ARI. The Group Centre drainage infrastructure also connects to extensive areas of residential development which would have been designed to accommodate 5 year ARI storm flows.

Conversation with relevant ACT Government agencies has not revealed a history of local flooding which could be attributed to a systematic capacity issues or loss of integrity. The only exceptions are: -

-

-

A known local flooding issue a couple hundred meters from the site along Beasley St (nos. 215 and 217) which involved surcharging stormwater sumps and overland flow problems. It is understood that this has been rectified as part of the ACT Government stormwater drainage improvement works.

A minor flooding history on the corner of Heard Street and Mawson Drive (CPSU office) due to stormwater surcharging, perhaps associated with potential lack of capacity in the underground infrastructure (ACT Roads, December 2011).

Stormwater surcharging from stormwater pits (from the underground infrastructure) and popping off lids near the intersection of Wilkins Street and Beasley Street.

Significant stormwater infrastructure is located under Athllon Drive and Beasley Street, to the south of the group centre. This includes large stormwater pipes (ranging from 1050 mm to 1800 mm in diameter). Another major drainage line (1200 mm to 1800 mm diameter) crosses Athllon Drive near the intersection with Mawson Drive.

Stormwater Infrastructure — Major System Floodways are designed to carry the gap flow or difference between the piped minor flow and the major (100 year ARI) flow, as well as providing freeboard to abutting developments. Freeboard is the difference between the top of bank and the major water level. The minimum permissible freeboard for floodways is 300 mm (TaMS DSUI), however the recommended freeboard is 500 mm (Australian Rainfall and Runoff).

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Mawson Group Centre

20

When designing floodways several factors need to be taken into account — some of which include vegetation (landscaping, trees, etc.) located within the 100 year AR) flood line, stormwater velocities, hydraulic profiles, etc.

The site features two major regional floodways which drain storm flows in excess of the underground piped network. The first one is located in the south eastern corner of the group centre and flows in a north-westerly direction over public open space and a foot/cycle path. It drains to the existing Mawson District Playing Fields which act as a stormwater detention facility.

The second floodway runs parallel to Athllon Drive in a south-north direction. It collects the stormwater flow from the piped network coming from the south of the site as well as minor cross drainage from Athllon Drive.

Maintaining the capacity and integrity of the floodways will be important as flash flooding and regional flooding could become an issue if not carefully included in design requirements. As local history has shown (in Woden Valley in 1971), flash flooding has the potential to generate significant damage to private and public assets. It may also include risk to public safety.

Consultation with Roads ACT revealed that upkeep of the floodways is a particular issue for their maintenance team. The scour protection provided for extensive length of the floodways (Fabromat, a grout injected mattress) is aging and wearing off. Most storms lead to partial scour of the floodway and require repairs and reinstatement. The stone pitching located throughout the area is aging as well and becoming sensitive to scour.

Mawson's stormwater drainage channels are some of the most susceptible to damage in the ACT. Over the past two years, stormwater damage in the area has amounted to approximately $1m per annum in repairs. This represents in excess of 15% of the total damage cost for the whole of the ACT (R Schofield, pers. Comm., December 2011).

Refer to the stormwater infrastructure map (M3, Appendix A) for more details about the specific issues and their locations.

Stormwater Quality Management and Water Sensitive Urban Design There are no existing stormwater quality control measures in the catchment or on-site. Urban stormwater would be discharges uncontrolled to the receiving drainage channel in the north of the site.

The catchment is not expected to be able to meet the current stormwater quality improvement targets as specified in the ACT WaterWays Water Sensitive Urban Design General Code.

However preliminary design work has been undertaken by others considering retardation basins at: 1)

North of Mawson Drive

2)

Within Mawson District Ovals (in the northeast corner, including construction of the embankment)

A possible off-line wetland is also being considered further downstream.

These measures are proposed to improve the Yarralumla Creek catchment.

4.2

Water

ActewAGL water infrastructure is located throughout the project area. It includes a network of distribution mains, reticulation mains, service lines (fire and domestic), and structures such as hydrants, meters and valves. The network was constructed in the 1960s and is considered to be in acceptable condition. It has sufficient capacity (in terms of hydraulic conveyance and residual pressure) to meet current demands (in accordance with AWSSS).

The 100 mm diameter main located in the verge of Mountevans Street and a section of the main in Heard Street do not comply with AWSSS clause 3.9. ActewAGL believes this is acceptable for current demands because the system predates AWSSS and the network performance is not compromised.

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Mawson Group Centre

21

Any new developments may necessitate upgrading the 100 mm diameter main to retain compliance with AWSSS. The project area is located entirely within the Intermediate Zone (685 m AHD) which is fed by the Pearce Reservoir (Rural Block 1045).

No major upgrades within the project area are included in ActewAGL's current five year capital works program.

Water infrastructure located within the project area is included in Figure M4 in Appendix A.

4.3

Sewer

ActewAGL sewer infrastructure is located throughout the project area as illustrated in Figure M5, Appendix A. It includes a network of gravity mains (trunk and reticulation) and structures such as manholes. The project area is divided into two sewer sub-catchments — the northern and southern.

Currently ActewAGL has no plans for upgrades in either of the sub-catchments.

Southern Sub-catchment The southern portion of the site, which includes the ovals and buildings located within Blocks 22 and 24 (Section 47), drain to a 375 mm diameter trunk main which crosses Block 25 and connects to a trunk main in the western verge of Athllon Drive. This trunk main flows north through Phillip and Woden (increasing in pipe size) and ultimately to the Lower Molonglo Water Quality Control Centre (LMWQCC) via the Woden Valley Trunk Sewer (VVVTS). The portion of the trunk main located within Block 25 (Mawson Ovals) and crossing Athllon Drive is near capacity and may not be able to cope with additional flow from new developments.

Northern Sub-catchment The northern portion of the project area (including the shopping centre) drains to a 300 mm diameter trunk main which crosses Mawson Drive and runs north through Block 9, Section 58 (east side of Athllon Drive). This trunk main continues north, ultimately connecting to the LMWQCC via the WVTS. The sewer mains within the northern sub-catchment may have spare capacity to handle increased flows from future developments; however the trunk main is near capacity.

The ACT Government's indicative land release for 2014 — 2015 includes approximately 300 new residential dwellings within the Athllon Drive Corridor, located north (downstream) of the project area.

Any new development within this corridor would connect to the Athllon Drive trunk main and will likely put strain on its capacity and therefore impact upon any new developments upstream. The Athllon Drive Corridor development as well as any new or redevelopment within the project area will need to be included in ActewAGL's master planning process.

Woden Valley Trunk Sewer The northern end of the Woden trunk system (including the WVTS through Curtin) is at or near capacity. Any large development within the Woden Valley will likely put strain on this part of the system, which may require augmentation. Actew Corp. and ActewAGL are currently considering some options to augment capacity of the trunk sewer, however they require as much lead time as possible for major augmentation works so they could be included in Actew's major capital works program.

4.4

Gas

The gas network within the project area was installed in the mid to late 1980s and is in good condition.

There are no capacity issues based on current demands, and therefore no system upgrades currently planned.

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Mawson Group Centre

22

Gas infrastructure located within the project area is included in Figure M6 in Appendix A.

4.5

Electricity

Electricity infrastructure located within the project area is included in Figure M7 in Appendix A. ActewAGL provided the following advice in their Network Performance and Status Review for Mawson Group Centre. A copy of the complete report is included in Appendix C. Feeders — Capacity The proposed development area is serviced by several feeders at 11kV from Wanniassa zone substation. Feeder construction within this area is predominantly overhead lines servicing mostly residential load and some commercial load.

The present combined spare capacity available from those feeders with direct access for connection o f new load within the study area is around 3MVA. Network re-configuration and, if required, minor augmentation works to provide ties and switching points with other suitable feeders will increase the spare capacity to around 6MVA. Known upcoming load in the area covered by these feeders including an Aged Care Centre could reduce this capacity by between 0.5MVA and 1MVA. Some o f these feeders may also be required to participate in network re-configuration exercises to accept load transfer from Woden zone substation feeders (see notes under 'Zone Substation). In this event the available spare capacity will be compromised further.

Details o f the location, demand, timing and load mix for the proposed commercial zone will enable ActewAGL to initiate plans to develop the network to a state that will meet the needs of this development. As it takes up to 12 months to plan, design, obtain approvals, procure material and resources and construct a new feeder it is recommended that load details and timing be confirmed to ActewAGL in time to meet scheduled dates for power delivery.

Feeders — Performance The overall performance o f the feeders supplying this area has not been a cause for concern.

Individual feeder performance is regularly monitored and action taken i f required to ensure relevant standards and guidelines are satisfied.

Zone Substation The feeders supplying load in this area originate from Wanniassa zone substation. This n isubstation ter-zone has a feeder area which overlaps that o f Woden zone substation thus facilitating load transfers and balancing. Woden zone substation is expected to experience a significant increase in demand due to several large developments within its supply area. Until the Molonglo zone substation is available (in early 2016) Wanniassa zone substation may be called upon to support Woden zone substation. In this case a substantial increase in demand, perhaps from the proposed Mawson Commercial development, could take Wanniassa zone substation close to or in excess of its firm capacity.

A new zone substation has been planned to augment electricity supply to the existing Woden supply network and to meet demand in the region beyond the short term. Stage 1 of this facility (Molonglo zone substation) will be ready in 2016.

Summary The existing electricity distribution network in the proposed Mawson commercial zone development complies with ActewAGL's capacity, reliability and quality guidelines. Although there is no known development in this area that could directly cause network supply capacity to be exceeded it is likely that load transfers and balancing in conjunction with Woden zone substation supply network will limit the overall available capacity.

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Mawson Group Centre

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23

A large scale development could trigger the need to augment the network. This will be driven by the timing, demand profile and location of the development. This information is required in advance for ActewAGL to implement appropriate measures to ensure network capability and readiness to meet scheduled supply needs.

4.6

Telecommunications

AAPT

-

AAPT has no assets located within the project area. There are no plans to expand the AAPT network into Mawson Group Centre in the foreseeable future.

ICON

ICON is a Government organisation which provides telecommunications services to government buildings in the ACT. Existing ICON infrastructure is located within the road reserves of Athllon Drive and Beasley Street.

ICON would be interested in extending their existing infrastructure in the area by adding additional conduits and fibres should any developments occur within the project area.

Optus

Optus infrastructure is located within the eastern verge of Athllon Drive, the southern verge of Mawson Drive, and a portion of the northern verge of Beasley Street.

Telstra

The project area is serviced via the telephone exchange which is located in the southwest corner of the Mawson Drive/ Beasley Street intersection.

Telstra's program of network upgrades is demand driven with augmentation carried out on an as needed basis based on economic viability.

TransACT

TransACT infrastructure is located throughout Mawson Group Centre in the form of overhead and underground cables. It is a combination of field electronics, optical fibre and copper cabling.

Infrastructure is located within the reserves of several roads.

NBN

There is no NBN infrastructure currently located within the project area.

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Mawson Group Centre

24

5.0

Planned and Approved Developments

5.1

2011/2012 Determined or Pending Development Applications

Four Development Applications (DAs) were either posted for public comment or shown as 'determined' in 2011/2012.

Table .6

, DA

Summary of DAs

Number

i Section i Block Address

r Description ,

201120585

29

18

73 Hurley Street (located north of Mawson Drive)

MULTI DWELLING-DEMOLITION-2 NEW DWELLINGS-LEASE VARIATION. Proposal is for demolition of existing residence and garage and construction of 2 single storey dwellings with attached garages and associated works.

201119925 (Determined 2011)

8

47

102 Mawson Place

Public Works, Design and Siting.

Entrance to park 'n ride located to the west of the block.

201120046 (Determined 2011)

1

47

104 Mawson Place

Design and Siting, Commercial, Industrial, Signs, Additions/ Alterations

201018957 (Determined 2011)

7

46

22 Mawson Place

Design and Siting, Signs

Source: www.actiola.actgov.au

5.2

Lease and Development Conditions

No newly approved lease and development conditions were posted (as of 07 November 2011) on ESDD's website (apps.actpla.act.gov.au/plandev/e-registers/Idc/Idcsearch_new.htm).

5.3

Planned and Approved Infrastructure

The pending/ recently determined DAs are not anticipated to have a significant impact on existing infrastructure. Localised improvements (stormwater drainage, property access, service ties, etc.) will be dealt with as part of each individual DA. In response to the significant pressure on the major drainage infrastructure and history of flooding and high scour of floodways and stormwater infrastructure, the ACT Government has progressed with a feasibility study and PSP design of stormwater detention basins in a range of location in the Mawson area with the objective of reducing the peak flows from the Mawson sub-catchment (Cardno, 2009, lndesco, 2012).

Location 3, option 3 consists of an approximately 2m high bund (max. 2.80m) built around the Mawson Playing Field which would let stormwater surcharge into the basin in large events and contribute to attenuation flows. It is expected that the 22ML storage would attenuate peak 100 year ARI flows from 66.3m31s to 53.2m3/s (nearly 20% at gauging station GS410753). It is understood that detailed design of the measure is to be initiated shortly.

Existing deficiencies in transport infrastructure should be considered for improvement concurrently with short term development of the site. These may include: -

Remove informal access from Athllon Drive to the overflow parking at the playing fields

-

Relocate (or install additional) local bus stops on Mawson Drive and Beasley Street closer to Blue Rapid stops on Athllon Drive

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Mawson Group Centre

25

Install one or two pedestrian crossing facilities (either zebra crossings or pedestrian refuge islands) on the north-south running leg of Mawson Place Extend the shared path leading from the underpass at Beasley Street through the ovals to the existing zebra crossing on Mawson Place Athllon Drive Corridor (Phillip) The ACT 2012 -13 to 2015,16 indicative land release program includes an area of the Athllon Drive road corridor in Phillip for englobo/ private sector development in 2014-15 (300 residential dwellings) and 2015-16 (200 residential dwellings). This area is located north (downstream) of the Mawson Group Centre. The timing and level of development will impact upon utilities infrastructure which could have a flow on effect on future development within Mawson. This is discussed in more detail in Section 8.0.

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26

Mawson Group Centre

6.0

Proposed Development Scenario

The Mawson Group Centre Master Plan is currently under development by ESDD and is not scheduled for completion prior to the conclusion of this infrastructure study. Therefore, a maximum expected level of potential long term (2031) development/ redevelopment (proposed development scenario) to be assessed in this infrastructure study was agreed between ESDD and AECOM. It is anticipated that the maximum potential development included in the future master plan will not exceed this proposed development scenario. Key aspects of the proposed development scenario (refer to Figure M8,.Appendix.13) are noted in Table 7. . .

Table 7

P r o p o s e d d e v e l o p m e n t s c e n a r i o details

i No. of I Storeys

Location

.f Cornposition of Storeys

L

Core of the Group Centre

6

-

1 level retail 2 levels office/ commercial 3 levels residential

Blocks adjacent to Mawson Place

4

-

1 level retail 1 level office/ commercial 2 levels residential

Majority of blocks bounded by Mountevans Street and Heard Street Section 57

4

-

2 levels office/ commercial 2 levels residential

3— 6

-

Residential

Section 34

Development is not planned on a number of blocks (refer to Figure M8, Appendix B) due to existing constraints such as stormwater overland flow.

Assumptions concerning estimated use (e.g. commercial, retail, and residential), gross floor area (GFA), number of employees, etc. were made when calculating infrastructure demands. Key assumptions are noted in Table 8. These assumptions were required in order to calculate utility demands, trip generation rates and car parking. It is envisioned that they will be refined as part of the master plan and as individual developments move into a more detailed design phase.

Table 8

P r o p o s e d d e v e l o p m e n t s c e n a r i o key assumptions

Development Type

Key Assumptions

Residential

Development will occupy 80% of the block area — total GFA is equal to 80% block area x number of storeys. Where residential development is located above retail or office/ commercial development it will occupy 100% of the block area — total GFA is equal to 100% block area x number of storeys.

15% of total GFA is allowed for corridors and other non-residential areas.

Of the remaining 85%: 60% 1-bedroom units (50 m2) 35% 2-bedroom units (65 m2) 5% 3-bedroom units (80 m2) -

Retail

-

Office/ Commercial

5 November 2012

-

Development will occupy 100% of the block area — total GFA is equal to 100% block area x number of storeys One employee is assumed per 40 m2 of GFA Development will occupy 100% of the block area — total GFA is equal to 100% block area x number of storeys

Mawson Group Centre

AECOM

Development Type

Key Assumptions -

Club/ Entertainment

-

5 November 2012

27

One employee is assumed per 30 m2 of GFA Development will occupy 60% of the block area — total GFA is equal to 60% block area x number of storeys.

One third of the GFA is administration (1 seat/ 15 m2), one third is dining (1 seat/ 5 m2) and a third club/ bar (1 seat/ 2 m2)

AECOM

7.0

Mawson Group Centre

28

Long Term Traffic and Transport Infrastructure

Transport impacts were assessed qualitatively for the proposed development scenario. Trip generation has a direct relationship with land use intensity. Widely-accepted transport planning guidelines estimate trip generation at 60 peak hour trips per 100 dwelling units and 2 to 6 trips per 100 square metres of commercial development. [Source: New South Wales RTA Guide to Traffic: Generating Developments (2002)]. Because the proposed development scenario is the maximum expected level, a significant number of vehicle trips are considered in this qualitative analysis.

The project area and proposed development "scenario Were considered in detail for attributes that would tend to affect the trip generation rates. Retail and entertainment uses generate more trips during the evening peak than in the morning peak. Due to mixing of uses, some trips will be reduced by internal capture as users will stay in the project area to complete multiple trip purposes. Due to the project area's proximity to a fast, frequent bus service, it can be expected that a proportion of trips will made by public transport. To consider the impact of the proposed development scenario, vehicle trips were assumed to follow distributions similar to existing patterns.

The effects of traffic generated by redevelopment of the project area on the existing and planned transport network was considered qualitatively. Because there are no major developments or transport improvement plans in the vicinity of the project area, through traffic volumes from the ACT Strategic Model were not included in this analysis.

7.1

Road Traffic

7.1.1

Access to the Group Centre

Access to the project area is expected to continue via Mawson Drive, Mawson Place and Heard Street. Heard Street would be expected to provide the bulk of the access due to its longer length, better connections and lack of on street parking.

7.1.2

Access to the Mawson District Playing Fields

The existing access arrangements for drivers, pedestrians and cyclists will remain largely the same in the long term. Aside from closing the informal access to overflow parking from Athllon Drive (which is flagged for consideration in the short term) no changes are considered for the long term.

7.1.3

Intersections

Both of the signalised intersections near the group centre (Athllon Drive / Mawson Drive, and Athllon Drive / Beasley Street) are nearing capacity during peak hours. Athllon Drive / Mawson Drive is closer to capacity. More of the traffic generated by the development proposal will flow through Athllon Drive / Mawson Drive because it is closer to the main access points and it is in the path of most travellers heading north, south and west from the group centre.

Providing a left turn lane on southbound Athllon Drive and lengthening right turn lanes northbound and on Mawson Drive will increase capacity and decrease delays at the intersection. Lengthening the right turn lanes on Mawson Drive will provide extra capacity for drivers leaving the group centre heading to City, Woden Town Centre and the Inner South.

Based on this qualitative assessment, it does not appear that the proposed development scenario would necessitate intersection upgrades at Athllon Drive / Beasley Street. The potential long term signalised intersection upgrades are summarised in Table 9.

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Mawson Group Centre

AECOM

Table 9

29

Potential upgrades for signalised intersections

Intersection

Potential Upgrade

Athllon Drive / Mawson Drive

-

Athllon Drive / Beasley Street N/A = no upgrades indicated

-

May require lengthening right turn lanes northbound and southbound Athllon Drive May require constructing left turn lane on southbound Athllon Drive May require lengthening right turn lanes on westbound Mawson Drive

-

N/A

Based on this qualitative assessment, most of the unsignalised intersections near the group centre are expected to perform satisfactorily under the proposed development scenario. Mawson Drive / Heard Street, however, is currently near capacity during peak periods, and will be required to handle increased traffic flows under the proposed development scenario. It may be necessary to signalise this intersection. Signalisation would increase vehicle throughput and reduce delays for all users.

Generally, when yield controlled intersections are signalised, storage must be increased on all approaches. It may be necessary to add left turn lanes at Heard Street and lengthen the right turn lane on Mawson Drive.

It does not appear the proposed development scenario would necessitate intersection upgrades at Athllon Drive / Beasley Street. The potential long term upgrades to unsignalised intersection are summarised in Table 10.

Table 10

,

Potential upgrades for unsignalised intersections

Intersection

,

Potential Upgrade

Mawson Drive / Heard Street

-

May require signalisation, widening of approach from Heard Street, and ad'ustments to intersection la out

Mawson Drive / Wilkins Street

-

N/A

Heard Street / Wilkins Street

-

N/A

Wilkins Street / Beasley Street

-

N/A

Heard Street / Mawson Place

-

N/A

Mawson Drive / Mawson Place N/A = no upgrades indicated

-

N/A

7.2

Parking

Parking for all new developments will need to be supplied in accordance with the Parking and Vehicle Access General Code, which stipulates number, location and design for car parks required for development approval. It is important to consider that the proposed development scenario is based on re-development of existing surface car parks. In other similar situations, redevelopment plans have been required to replace existing parking and accommodate their own uses on site. It is expected that this would be a consideration for future development.

5 November 2012

AECOM

7.3

Mawson Group Centre

30

Public Transport

Public transport service at the Group Centre is expected to capture a large share of trips generated by the proposed development. Current services, routing and stop locations are appropriate for additional development, however, capacity would have to be assessed further as development is planned and implemented.

If the proposed development scenario is realised, it may place car parking pressure on the Park and Ride facility at Athllon Drive and Mawson Drive. It is expected that the Park and Ride facility may have to be converted to an all permit or controlled access system. -

7.4

Walking and Cycling

This qualitative analysis does not foresee that additional pedestrian or cycling facilities (beyond the short term considerations noted in Section 5.3 would be needed to serve the proposed development scenario.

5 November 2012

Mawson Group Centre

AECOM

8.0

Long Term Utilities Infrastructure

8.1

Stormwater

31

Existing Infrastructure It is not expected that any of the proposed developments (long term) will significantly impact upon the existing stormwater infrastructure. The proposed master plan involves limited increases in the degree of imperviousness in the catchment, which is already extensively developed. The majority of blocks to be released are composed primarily of impervious surfaces, and it is expected that WSUD measures will be developed in the new developments in accordance with the current legislation. The only area where redevelopment will likely generate increased stormwater runoff is in Section 34 which will go from lower to higher density land use.

Stormwater Infrastructure — Minor System As previously outlined in Section 4.1, the existing minor stormwater infrastructure in Mawson Group Centre is generally considered appropriate and considered to provide a 10 year ARI drainage level of service.

There a couple of exceptions that will be need to be adequately considered in line with the proposed master plan, specifically: -

-

Detailed investigation into stormwater drainage infrastructure along Heard Street which is not expected to currently provide an adequate level of service. This may be caused by pipe separation, siltation and pipe blockage or systemic deficiency (undersizing).

Integrate the proposed intensification of land use (increased imperviousness) of Section 34 into the stormwater infrastructure upgrade where required (Mountevans Street and Heard Street)

A number of supplementary studies would be useful in clarifying existing issues and limiting the risk of the ACT government being exposed to claims that the redevelopment is causing new damages or loss of amenity by the local community. In particular: -

Detailed investigation into stornnwater infrastructure conditions and capacity near the intersection of Wilkins Street and Beasley Street.

Detailed investigation into stormwater infrastructure conditions and capacity in Hurley Street and area, mainly to be able to demonstrate the proposed redevelopment will not exacerbate existing issues.

Finally, it is recommended that the changes to the stormwater infrastructure in the area of the recently constructed Park & Ride facility be confirmed and documented.

Stormwater Infrastructure — Major System As clearly identified by the consultation with Roads ACT maintenance team, the floodway immediately adjacent to the Mawson Group Centre is currently one of the most significant maintenance burdens.

Cost associated with the maintenance and temporary stabilisation of the floodway is understood to be in the order of $1,000,000 per annum for the last couple of wet years (R Schofield, pers. comm., December 2011).

Consequently, it is recommended that some of the proposed stormwater detention facilities (Mawson retardation basin), be considered as part of a detailed investigation into the best long term scour protection along the Mawson floodways. This should be considered as part of a risk management framework in order to provide the ACT Government with a solid information base on which a decision regarding the upgrade, rehabilitation or commitment to ongoing high maintenance cost can be made.

5 November 2012

AECOM

Mawson Group Centre

32

There is also an overland flow relief flow path located south of Block 23/47 at Mawson Place. This relief flow path, which conveys water surcharging from underground stormwater network (R Schofield, pers. comm., December 2011) will need to be maintained or improved as Block 23147 is redeveloped.

Stormwater Quality Management and Water Sensitive Urban Design As outlined in Section 4.1, the existing infrastructure predates the current stormwater quality regulatory framework. Consequently, stormwater quality control is not existent. Efforts should be made in the redevelopment of Mawson Group Centre to rectify the situation'and oontribute to protecting downstream receiving waterways.

8.1.1

WSUD Opportunities

The topography of the catchment and layout of the stormwater infrastructure for the group centre is not supportive of a single end-of-pipe measures that would be able to tackle stormwater pollution for the all site.

Consequently, it will be required to undertake a series of detailed investigation and options study in order to determine the optimum strategy and configuration for stormwater quality improvement devices.

A series of relevant locations have been identified in Figure M3. Identification of appropriate specific devices will be required as part of the detailed investigation. These could include: -

Proprietary products (e.g., CDS, Stormceptor, Vortechs);

-

DUS GPTs

Distributed measures in the streetscape prior to collecting in stormwater infrastructure Given the limited land availability and proposed masterplan, it is expected that larger options such as bioretention basins or wetlands at the end of the stormwater network would be difficult to achieve.

AECOM however recommends that smaller and distributed measures such as raingardens, tree pits or porous pavements be considered as part of the redevelopment of the street scape. Car parking bays are commonly particularly suitable for such measures.

The PSP design work recently completed by lndesco does not make any allowance for WSUD as part of the off line detention basin. It is expected by AECOM that WSUD would be challenging to incorporate at the Mawson oval, given the configuration of the basin as a surcharge basin, only being activated for large storm events. WSUD measures on the other target the small frequent storms which would be fully contained in underground pipes.

8.1.2

Opportunities for Non-potable Water

A Non-potable Water Master Plan (AECOM, 16 December 2011) was prepared for Canberra. The master plan was designed to enable a systematic assessment and development of alternative water sources — principally recycled water from sewage treatment plants and urban stormwater — for the ACT. The supply of non-potable water to maintain public open spaces was the main focus of the master plan.

The report recommended that stormwater harvesting of Lake Tuggeranong be designed and constructed within the first stage (2011-2015) of the five stage master plan. It is estimated that approximately 5 ha of public open space, sports fields, ovals, etc. within Mawson can be irrigated each year (approximately 27,600 kL/year) as part of the Lake Tuggeranong scheme.

A portion of the Lake Tuggeranong scheme is illustrated in Figure 15. The yellow lines represent the pipe network and the red squares (irrigation) demand clusters.

5 November 2012

AECOM

Mawson Group Centre

33

••• •

11i4'ieranong

Nr•

Figure 15

0.

/

-

, • • Lake Tuggeranong stormwater harvesting scheme (ACT Non-potable Water Master Plan Study, 2012)

".

5 November 2012

AECOM

8.2

Mawson Group Centre

34

Water

Advice from ActewAGL regarding the impact of the proposed development scenario was not available (as of 05/11/12) for input into this report. Based on previous advice (refer Section 4.2), the following assumptions have been made in order to complete the proposed costing in Section 11.0: -

The project area is classified as a Group Centre and therefore will have a minimum fire risk type of F4 (60 L/s) in accordance with Table 2-2 of AWSSS. This necessitates that any existing 100 mm diameter reticulation mains will need to be upgraded to a minimum of 150 mm diameter to meet current standards. These mains are identified in Figure M4 in Appendix A.

-

The potential development scenario proposes development heights of up to 6 storeys within the group centre. The capacity of the existing water infrastructure to cater for fire demands created by these building heights will need to confirmed with ActewAGL. Augmentation in addition to the main upsizing noted above is not able to be determined at this time, and is therefore not included in the cost assessment.

8.3

Sewer

ActewAGL will be installing temporary flow gauges in sewers within the catchment over the next few months. A new rainfall dependent sewer model will then be created based on data from these gauges. This model should be able to provide more detailed capacity advice, particularly for reticulation sewers. The anticipated sewer augmentation measures noted below are based upon ActewAGL's existing sewer gauges and model. This advice may change once the new model is developed.

Southern Sub-catchment The proposed development scenario does not include any new development/ redevelopment within the southern sewer sub-catchment. Therefore, the trunk main located in the western verge of Athllon Drive should not be a constraint.

Northern Sub-catchment The proposed development within Mawson Group Centre will put strain on existing reticulation sewers.

There should be enough capacity, but it may be necessary to upgrade some lengths (approximately 100 — 200 m) of 150 mm and 225 mm diameter reticulation mains, depending upon the final development layouts. This would need to be confirmed as part of site investigations for the individual developments.

Together, the proposed Athllon Drive corridor and Mawson Group Centre developments will exceed the capacity of the 300 mm — 375 mm diameter trunk mains located north (downstream) of the group centre. ActewAGL has provided preliminary augmentation advice based on their existing model. It is anticipated that there would be two packages of works: 1)

Upgrade around 375 m of the 300 mm diameter sewer main (to 375 mm diameter) located immediately to the north of the group centre. This work will likely need to be completed to cater for the Mawson Group Centre proposed development scenario.

2)

Upgrade approximately 340 m of the 375 mm diameter sewer main (to 450 mm diameter) to the north of the Athllon Drive development. It is envisioned that this work would be completed as part of the Athllon Drive development.

Woden Valley Trunk Sewer The WVTS is currently at or near capacity and any new development within the sewer catchment will be limited by this infrastructure. Augmentation works may be required to cater for the proposed

5 November 2012

Mawson Group Centre

AECOM

35

development scenario. Early planning of this augmentation works will be necessary to enable actions to take place.

The Path Forward The path forward for evaluating and augmenting existing infrastructure is: 1)

ActewAGL to install temporary sewer gauges

2)

ActewAGL to develop new sewer model and identify infrastructure constraints and issues

3)

Undertake an options study and indicative costing for augmentation works, particularly for the 1WTS.

4)

Include augmentation works in ActewAGL's next capital works budget (2019)* or as part of individual developments. ActewAGL's 2013-2018 budget has been set, and it is unlikely that large expenditures may be added to it.

*The party (ActewAGL, developer, ACT Government, etc.) financially responsible for the design and construction of augmentation works will need to be determined.

8.4

Gas

The Mawson Group Centre gas network is in close to a district regulator, therefore there is capacity for the proposed development. Existing mains can be utilised as much as is feasible. There may be some extensions or realignment of mains required depending on the meter location, and the location and layout of development.

8.5

Electricity

There is some spare capacity (3 MVA) within the existing 11 kV feeders from Wanniassa Zone Substation, and network reconfiguration will provide (an additional 3 MVA) further spare capacity.

As noted in Section 4.5, ActewAGL has stated that load balancing together with the Woden Zone Substation supply network, may limit the overall available capacity until Stage 1 of the Molonglo Zone Substation is completed in 2016. It may be possible to augment the existing 11 kV feeders within/ adjacent to the project area to provide additional supply. This would typically cost about half to a quarter of the cost of a new feeder from the Wanniassa Zone Substation.

Liaison with ActewAGL regarding the location, demand, timing and type of load will be required to ensure that the future needs of the group centre can be met. The type of load is important as different loads have different peaks. For example, residential load peaks will likely occur in the evening, while commercial peaks occur during the day.

8.6

Telecommunications

AAPT The proposed development has a significant residential component. AAPT does not have any residential customers after selling their consumer division in 2010.

There are no plans to expand the AAPT network into Mawson Group Centre in the foreseeable future.

AAPT network expansion is typically customer driven and may occur as new potential (non-residential) customers move into the area.

5 November 2012

AECOM

Mawson Group Centre

36

ICON Refer to section 4.6 as no further advice has been received.

Optus Refer to section 4.6 as no further advice has been received.

Telstra Telstra has advised that there is sufficient capacity in their network to service the area of proposed development. They will refine their capital works program as the proposed development progresses into a more detailed design phase.

Telstra's program of network upgrades is demand driven with augmentation carried out on an as needed basis based on economic viability.

TransACT TransACT is able to provide a variety of communications services to this area to meet customer demand, including fibre to the premises.

NBN There are plans to provide broadband to the area with fibre to the premises. Mawson is part of the three year NBN roll out plan for the Kambah Fibre Serving Area (FSA). An FSA is an area where a section of the network will be built. It can be comprised of a number of suburbs, depending on the number of premises, landscape and technical factors. Each FSA will be built in a number of stages or modules called Fibre Serving Area Modules (FSAM). The Kambah FSA design is expected to be completed in April 2014. It will take approximately 12— 18 months (7 FSAMs) from completion of the design to the area being 'NBN ready.' It has not yet been determined under which FSAM Mawson Group Centre will be.

NBN will be constructed as both underground and overhead infrastructure. NBN and Telstra have a Deed of Agreement. This agreement allows NBN to access Telstra infrastructure and utilise existing pits and pipes where possible. NBN will install new conduits and pits as a last resort where Telstra infrastructure is not available or fit for purpose.

The proposed development scenario will have an impact on the NBN roll out. NBN needs to allocate capacity for current dwellings as well as enough for future growth. Future coordination between ESDD and NBN will be required to ensure future growth is provided for in the NBN design.

5 November 2012

Mawson Group Centre

AECOIV1

9.0

Stakeholder Workshop

Two stakeholder workshops were held on 27 March 2012 for Mawson Group Centre — a transport presentation and a utilities presentation. The stakeholder presentation meeting minutes and attendance list are included in Appendix D. Key action items noted in the meeting minutes have been addressed within the content of this report.

5 November 2012

37

AECONI

10.0

Mawson Group Centre

38

Further Investigations

It is recommended that a number of further investigations be completed as the proposed development scenario proceeds into a more detailed design phase.

10.1

Transport Infrastructure

On-going coordination is required with other government agencies regarding proposed works/development within and adjacent to the Group Centre, but which may have an impact on the master plan, e.g. Athllon Drive corridor.

Transport improvements include: Investigation into and rectification of noted existing transport infrastructure deficiencies:

-

•

Remove informal access from Athllon Drive to the overflow parking at the playing fields

•

Relocate (or install additional) local bus stops on Mawson Drive and Beasley Street closer to Blue Rapid stops on Athllon Drive

•

Install one or two pedestrian crossing facilities (either zebra crossings or pedestrian refuge islands) on the north-south running leg of Mawson Place

•

Extend the shared path leading from the underpass at Beasley Street through the ovals to the existing zebra crossing on Mawson Place

-

Investigation into Athllon Drive/ Mawson Drive intersection as discussed in Section 7.1

-

Signalisation of Mawson / Heard Street intersection in the long term

-

Assessment of public transport capacity as development is progressed.

-

Review of the functionality and demand for the Park and Ride facility if the full potential development scenario is realised. It may need to be converted to an all permit or controlled access system.

10.2 -

Utilities Infrastructure

Detailed investigation into stormwater drainage infrastructure along Heard Street which is not expected to currently provide an adequate level of service.

Integrate the proposed intensification of land use (increased imperviousness) of Section 34 into the stormwater infrastructure upgrade where required (Mountevans Street and Heard Street) Detailed investigation into stormwater infrastructure conditions and capacity near the intersection of Wilkins Street and Beasley Street.

Detailed investigation into stormwater infrastructure conditions and capacity in Hurley Street and area, mainly to be able to demonstrate the proposed redevelopment will not exacerbate existing issues.

Changes to the stormwater infrastructure in the area of the recently constructed Park and Ride facility be confirmed and documented.

Following detailed design of the Mawson playing field detention basin, detailed investigation be carried out on the residual requirement to armour or stabilise the existing floodway adjacent ot Athllon Drive.

-

Undertake a series of detailed investigation and options study in order to determine the optimum strategy and configuration for stormwater quality improvement devices.

-

Investigation (building upon the existing Non-potable Water Master Plan work) into opportunities for using non-potable water for irrigation of public open spaces and sports fields.

5 November 2012

AECOM

Mawson Group Centre

-

Water main improvements (upsizing of 100 mm diameter mains) to satisfy fire risk type F4 standards.

-

Liaison with ActewAGL regarding development of sewer model, options study and scoping of sewer infrastructure upgrades.

Liaison with ActewAGL regarding timing of development and the requirement for network rearrangement or 11 kV feeder extensions.

Liaison with telecommunication utilities concerning type and staging of development.

-

5 November 2012

39

AECOM

40

Mawson Group Centre

11.0

Opinion of Probable Cost for Infrastructure Improvements

This section includes indicative costs for utilities and traffic/ transport augmentation works to service the potential long term. The identified costs are for the proposed augmentation measures described in the previous sections of this report. Costs have not been included for some items when a reasonable estimate could not be made based on the information provided by stakeholders.

The costs identified in Table 11 include 40% for contingency, 15% for preliminaries, 10% for fees and 10% for GST.

Table 11

Opinion o f p r o b a b l e c o s t f o r infrastructure improvements

UtibirServier- . .. ,Atsettiviime-,',

7-----7 — IDOSOriOticiitIOIWOrks

Stormwater (TaMS)

Investigation into and scoping of stormwater improvements: Stormwater drainage infrastructure along Mountevans Street and Heard Street.

Stormwater infrastructure conditions and capacity near the intersection of Wilkins Street/ Beasley Street.

Stormwater infrastructure conditions and capacity in Hurley Street and area, mainly to be able to demonstrate the proposed redevelopment will not exacerbate existing issues.

Confirm and document stormwater infrastructure in the area of the Park and Ride facility.

Undertake a series of detailed investigation and options study in order to determine the optimum strategy and configuration for stormwater quality improvement devices.

Investigation (building upon the existing Non-potable Water Master Plan work) into opportunities for using non-potable water for irrigation of public open spaces and sports fields.

Recommendation that some of the proposed stormwater detention facilities (Mawson retardation basin), and detailed investigation into the best long term scour protection and risk assessment be undertaken in order to provide the ACT Government with a solid information base on which a decision regarding the upgrade, rehabilitation or ongoing high maintenance cost can be made.

Water (ActewAGL)

Water main improvements (upsizing of 100 mm diameter mains) to satisfy fire risk type F4 standards

Sewer (ActewAGL)

Liaison with ActewAGL regarding development of sewer model, options study and scoping of sewer infrastructure upgrades.

Upgrade 100 - 200 m of 150 mm and 225 mm diameter reticulation mains.

Upgrade around 375 m of the 300 mm diameter sewer main (to 375 mm diameter) located immediately to the north of the Group Centre. This work will likely need to

be completed to cater for the Mawson Group Centre proposed development scenario.

5 November 2012

1, p l i a l a i r o T — , Aibabref_togt Further studies required to determine potential infrastructure upgrades required

_

Investigation work being undertaken

by ActewAGL

Mawson Group Centre

AECOIVI

iktset.Ostirkeil

41

,13e_sortptroni,of.W0Eks -

_ , _ , __ _,

______, Upgrade approximately 340 m of the 375 mm diameter sewer main (to 450 mm diameter) to the north of the Athllon Drive development. It is envisioned that this work

would be completed as part of the Athllon Drive development.

Gas - (Jemena).

Extension of reticulation mains to cater for location of new/ redevelopment. Approximately 825 m of 32-50 mm diameter gas main.

Electricity (ActewAGL)

Local augmentation of existing 11 kV feeders

Telecommunications (AAPT, ICON, NBN, Optus, Telstra, TransACT)

Liaison with telecommunication utilities concerning type and staging of development.

Transport

Investigation into and rectification of existing transport infrastructure deficiencies: -

-

-

Remove informal access from Athllon Drive to the overflow parking at the playing fields Relocate (or install additional) local bus stops on Mawson Drive and Beasley Street closer to Blue Rapid stops on Athllon Drive Install one or two pedestrian crossing facilities (either zebra crossings or pedestrian refuge islands) on the north-south running leg of Mawson Place Extend the shared path leading from the underpass at Beasley Street through the ovals to the existing zebra crossing on Mawson Place

Athllon Drive/ Mawson Drive intersection improvements Signalisation of Mawson/ Heard Street intersection (in the long term)

5 November 2012

N/A

AECOM

12.0

Mawson Group Centre

42

References

GIS data received from government agencies and service authorities via email or on CD: -

ActewAGL. Water, sewer, gas and electricity GIS data. Received via email from Matthew Cann on 07 December 2011 at 13:44.

-

Environment and Sustainable Development Directorate. Stormwater, cadastral, aerial photo and contour GIS data. Received via email from Daniel Goodwin on 15 November 2011 at 14:01.

Advice received from government agencies and service authorities via email or verbal conversation: -

AAPT. Telecommunications advice received via email from Darren Quarrel! on 10 January 2012 at 19:47.

-

AAPT. Telecommunications advice received via email from Philip Price on 05 October 2012 at 14:32.

-

ActewAGL. Water advice received via email from Danilo Mihic on 21 December 2011 at 9:46.

-

ActewAGL. Sewer advice received from Tim Elliott via email.

-

ICON. Telecommunications advice received at a meeting with C. Richardson, K. Brenner and M. Miller on 16 February 2012 at 13:00.

-

Jemena. Gas advice received from Steve Donnelly via email on 11 November 2011 at 12:12.

-

Jemena. Gas advice received from Elle Peters via email on 02 October 2012 at 17:05.

-

Optus. Telecommunications advice received from Paul A Barrett on 20 December 2011 at 16:12.

-

Telstra. Telecommunications advice received via email from Jacob Lai on 18 November 2011 at 10:34.

-

Territory and Municipal Services. Stormwater advice received from a verbal conversation with Karl Cloos on 24 November 2012 at 14:00.

-

Territory and Municipal Services. Stormwater advice received via email from Karl Cloos on 11 November 2011 at 10:55.

-

Telstra. Telecommunications advice received from Jacob Y Lai on 05 October 2012 at 16:18.

-

TransACT. Telecommunications advice received from Wayne Read on 09 November 2011 at 13:44.

ACTEWAGL, October 2006. A C T Water Supply and Sewerage Standards. ACTEW Corporation Ltd, Canberra, ACT. ACTION. Weekday Network Map. ACTION, Canberra, ACT. ACTION. Xpresso Network Map. ACTION, Canberra, ACT. ACTPLA, July 2007. Waterways: Water Sensitive Urban Design - General Code. ACT Planning and Land Authority, Canberra, ACT. ACTPLA. Parking and Vehicular Access General Code, Effective: 13 April 2012. ACT Planning and Land Authority, Canberra, ACT. ACTPLA, 2005. Canberra and Queanbeyan cycling and walking map. ACT Planning and Land Authority, Canberra, ACT. Pilgrim, DH, (ed). 1987. Australian Rainfall & Runoff- A Guide to Flood Estimation. Institution of Engineers, Australia, Barton, ACT. TaMS 2012. Design Standards for Urban Infrastructure. Department of Territory and Municipal Services, Canberra, ACT.

5 November 2012

AECOM

Mawson Group Centre

Appendix A

Infrastructure Maps

ACT Governmers

AZCOM

Environment and Sustainable Development

C

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., 11‘,./-)., Ji.,.:,..T .FA4 ,.4 -,----..-._ % -,

I

l nd flow requirements of overa 1 --. ot n i form future development o f 23/47 •

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4 1 •t.k i `, embankment ....,_ "i,' ' ' ..--"' ,./..,-•-' •-i- ---''_- ".' k ' o.

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i , j)rft7 • s

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:' •

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,.-----:: ,

' c o .(. . •. 4 i f • •' /1--& „ , , ,------_,...c:".., ,,,—/..,

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.,e1---._ •.:i.7,-ir., ,y",,,,It-, rter c.".••?,,,,..■ .• ...1,•: e-•/""r‘ '7"' •L.."--/,./i , •N.i, -i-/' i---'" • •,. , i.,,^,?-: .. . ),,,i,,--i,,,r:

• - ,ii

••.;""4„

" FARli Liini Project boundary --— — Stormwater ppie l desco 2012) = - - Stormwater ppie (n = i nal Fo l odway ii..■. Rego = l vant SOD I location e Ree Area of Interest -0.-

111/1

100 year ARI fo l od e l vel Retardn i g basn i embankment Undeveo l ped Hgih Denstiy Urban Low Denstiy Urban Undefn i ed overa l nd fo l w pah t

0 • , a 0 —

MAWSON GROUP CENTRE INFRASTRUCTURE STUDY I lck boundary and number Gross polutant trap l J Bo STORMWATER 1 Manhoel EN Park and Rdie bkie cage Idesco (2012), ESDD (2012), TAMS (2011) I Head / end wal MD Park and Rdie bus stop Source: n 50 0 200 100 Sump . E-1 Park and Rdie car park Dead end Data supplied by Territory and Municipal Services, part of the ACT Government m / (AHD) Contours

OCT 2012

60237744 m3 F.

ACT

Goostnasetn

Environment and Sustainable Development

AZCOM

CO) Project boundary

—

Service line (domestic) C I D Block boundary and number

—

Bulk supply main

—

Service line (fire)

t E a l Park and Ride bike cage

—

Distribution main

•

Hydrant

( M I Park and Ride bus stop

-

- Reticulation main

•

Protection valve

-

- 0 1 0 0 main l o b e upgraded to 0150

•

System valve

Park and Ride car park

MAWSON GROUP CENTRE INFRASTRUCTURE STUDY l WATER !

Source. ACTEWAGL (2011), ESDD (2012) 0

50

100

200

111■11111=-7==11•11■11 m

OCT 2012 60237744 FL,

RA A M4

WARNING: The ActevvAGL network Intrastmeture shown on thls map may be Inaccurate or incomplete. Under no circumstances shoukt inn ActetvAGL supplied information be felled upon for on-site work. ltel Int ornmlion must be connnsed in thence.

ACT

Govern:keen

A:COM

Environment and Sustainable Development

Upgrade approx.

375m of 0300 trunk main to 0375

'

- ..,.....

Mawson D r i v e 0 2 2 5 '

Pridham Street

fL.Z7; a t Project boundary boundary —

Gravity main -Trunk -Trunk Gravity main - Reticulation

—

•

Asset fitting

Egg Park and Ride bike cage

•

Maintenance hole

[ M a Park and Ride bus stop

r---n Block boundary and number

1 Park and Ride car park

MAWSON GROUP CENTRE INFRASTRUCTURE STUDY i SEWER

OCT 2012 60237744

Source: ACTEWAGL (2011), ESDD (2012) 0

50

100

200

mg

Gravity main - augmentation required WARNING: The ActewAGL network infrastructure shown on this map may be Inaccurate or incomplete. Under 110 circumstances should this intlewAGL supplied Information be relied upon for on-site work. All informafion must be confirmed In the field.

ACT

Governmen

Al COM

Environment and Sustainable Development

o

stree,t

t..)

•

t \ ° ' r o c k s Street

yc

r.

'6;

(Firli3j! Project boundary Gas pipe •••—. Proposed gas main extension / relocation —

Gas service (domestic)

—

Gas service (industrial 1 commercial)

Block boundary and number

•

CP test

•

Protection value W I Park and Ride bike cage

u

Gas fitting

E g a Park and Ride bus stop

•

System valve

1 - - ) Park and Ride car park

MAWSON GROUP CENTRE INFRASTRUCTURE STUDY GAS

o c r 2012 60237744

Source: ACTEWAGL (2011), ESDD (2012) 0

50

100

200

M6 r

WARNING: I k e AotewAGL network Infrastructure shown on this map may be inaccurate or incomplete. Under no circumstances should thIsActelvAGL supplied information be relied upon for on-site work. An information must be confirmed in the field.

ACT

Goverw.nt

Envlionment and Soralnob1e0evelopmem

itz),

Streetlight

-

HV and EHV overhead

•

Project boundary

LV underground , •

LV overhead

C.73 Block boundary and number

Service underground

Park and Ride bike cage

LVStreeflightUnderground E g i Park and Ride bus stop

— — • HV and EHV underground a —

ArCOM

n Duct bank et

Distribution enclosure

=

Park and Ride car park

MAVVSON GROUP CENTRE INFRASTRUCTURE STUDY ELECTRICITY Source: A C T E W A G L (2011), E S D D (2012)

0

50

100

200

OCT 2012 60237744 5

7-M

WARN)Na The ActewAGL network infrasInIchre shown this map may be Inacarate or incompJele. Under no circumstMCes should thls ActewAGL supplied infommtion be r e ean d upon for on-site work. AM information must be confirmed In Pie tied

AECOM

Mawson Group Centre

Appendix B

Potential Development Scenario

Mawson Group Centre

AECOM

Appendix B

Potential Development Scenario Total(no.

Section

b-1

Block storeys)

Retail (no. storeys)

-v i

Office/ Commercial (no. storeys)

Residential (no. storeys)

1

2

, No additional development planned

47

1

47

2

4

47

3

4

47

8

4

47

10

1 .

No additional development planned

47

12

No additional development planned

47

13

4

1

1

2

47

14

4

1

1

2

47

17

No additional development planned

47

18

47

20

Stormwater constraints - pipe and overland flow No additional development planned

47

21

47

22

Stormwater constraints - overland flow and stormwater pipe capacity No additional development planned

47

23

4

47

24

No additional development planned

47

25

No additional development planned

1 1

1

1

2

2

Assume extension of existing car park or new parking structure 46

1

4

1

1

2

46

2

6

1

2

3

46

3

6

1

2

3

46

5

4

1

1

2

46

6

4

1

1

2

46

7

6

1

2

3

46

8

6

1

2

3

46

9

4

1

1

2

46

10

4

1

1

2

46

11

6

1

2

3

46

12

6

1

2

3

46

14

6

1

2

3

46

16

6

1

2

3

46

17

6

1

2

3

46

19

6

1

2

3

46

21

6

1

2

3

5 November 2012

b-2

Mawson Group Centre

AECOM

Section

Block

Total (no. storeys)

Retail (n.ostoreys)

Office/ Commercial (no. storeys)

Residential (nostoreys . )

46

23

6

1

2

3

46

26

6

1

2

3

46

25

4

1

1

2

1

2

0

2

57

2

4

0

2

2

57

5

4

0

2

2

57

6

4

0

2

2

57

7

4

0

2

2

57

8

4

0

2

2

57

9

4

0

57

10

4

0

34

1

34

2

3

0

0

3

34

3

3

0

0

3

34

4

3

0

0

3

34

6

3

0

0

3

34

7

34

8

3

0

0

3

34

9

6

0

0

3

34

10

3

0

0

3

57

5 November 2012

.

â&#x20AC;˘

0

2 2

2

No additional development planned

No additional development planned

-

AC:tT Governune

Environment and Su,minable Development

I

AZCOM

M Project boundary Rock boundary and number

Egig Park and Ride bike cage

am MN

Total No Storeys (Retail, Office! Commercial, Residential) 6 (1-Ret, 2-0/C, 3-Res) 4 (Res) 4 (2-0/0, 2-Res)

E N 3 (Res)

E N Park and Ride bus stop

111/0 4 (1-Ret, 1-0/C, 2-Res)

I

E=1 Park and Ride car park

M

N E M I (Petrol Station)

I 6 (Res)

I 2 (Club 60%)

MAWSON GROUP CENTRE INFRASTRUCTURE STUDY PROPOSED DEVELOPMENT 0

Source: ACTEWAGL (2011), ESDD /2012) 50 100 200

m

OCT2012 60237744 M

WARNING; The AclewAGL. network infrastructure shown on this map may be Inaccurate or incomplete. Uncler no dralmstances should this ACIewAGL Supplied Information be relied upon for an-site work. All Information must be confirmed In the field,

AECOM

Mawson Group Centre

Appendix C

Electricity Network Performance and Status Review

ActewAGL N e t w o r k P e r f o r m a n c e a n d Status Review Background An enquiry was received from AECOM on behalf of the ACT Government on the capability of ActewAGL's distribution network to support a planned development in the Mawson commercial precinct.

I n f o r m a t i o n P r o v i d e d b y Proponent/Consultant A layout of the area under study was provided.

Information on demands and location (block, section) was not provided.

D i s t r i b u t i o n N e t w o r k Region Mawson commercial precinct.

Appendix 1 shows the 11kV feeder layout and distribution substation locations within the area of the proposed works.

Supply Network Feeders - Capacity The proposed development area is serviced by several feeders at 11kV from Wanniassa zone substation. Feeder construction within this area is predominantly overhead lines servicing mostly residential load and some commercial load.

The present combined spare capacity available from those feeders with direct access for connection of new load within the study area is around 3MVA. Network re-configuration and, if required, minor augmentation works to provide ties and switching points with other suitable feeders will increase the spare capacity to around 6MVA. Known upcoming load in the area covered by these feeders including an Aged Care Centre could reduce this capacity by between 0.5MVA and 1MVA. Some of these feeders may also be required to participate in network re-configuration exercises to accept load transfer from Woden zone substation feeders (see notes under 'Zone Substation'). In this event the available spare capacity will be compromised further.

Details of the location, demand, timing and load mix for the proposed commercial zone will enable ActewAGL to initiate plans to develop the network to a state that will meet the needs of this development. As it takes up to 12 months to plan, design, obtain approvals, procure material and resources and construct a new feeder it is recommended that load details and timing be confirmed to ActewAGL in time to meet scheduled dates for power delivery.

Feeders - Performance The overall performance of the feeders supplying this area has not been a cause for concern.

Individual feeder performance is regularly monitored and action taken if required to ensure relevant standards and guidelines are satisfied.

Zone Substation The feeders supplying load in this area originate from Wanniassa zone substation. This substation has a feeder area which overlaps that of Woden zone substation thus facilitating inter-zone load transfers and balancing. Woden zone substation is expected to experience a significant increase in demand due to several large developments within its supply area. Until the Molonglo zone substation is available (in early 2016) Wanniassa zone substation may be called upon to support Woden zone substation. In this case a substantial increase in demand, perhaps from the proposed Mawson Commercial development, could take Wanniassa zone substation close to or in excess of its firm capacity. â&#x20AC;˘ A new zone substation has been planned to augment electricity supply to the existing Woden supply network and to meet demand in the region beyond the short term. Stage 1 of this facility (Molonglo zone substation) will be ready in 2016.

Summary The existing electricity distribution network in the proposed Mawson commercial zone development complies with ActewAGL's capacity, reliability and quality guidelines. Although there is no known development in this area that could directly cause network supply capacity to be exceeded it is likely that load transfers and balancing in conjunction with Woden zone substation supply network will limit the overall available capacity.

A large scale development could trigger the need to augment the network. This will be driven by the timing, demand profile and location of the development. This information is required in advance for ActewAGL to implement appropriate measures to ensure network capability and readiness to meet scheduled supply needs.

Appendix 1: ActewAGL Distribution Network â&#x20AC;&#x201D; Mawson Commercial Area