Water Supply and Sewerage Infrastructure Plan 2014
Volume 1 November 2014
Doc # 43873766 – Ver.4 – November 14 Water Supply & Sewerage Infrastructure Plan 2014 – Volume 1 Page ii
Document Control:
Version Description Author Date Reviewed by
1 First Draft Coordinator Strategic Infrastructure Planning -George Parrott
June 2014 Executive Coordinator IWCP - Kathy Baker
2 Second Draft Coordinator Strategic Infrastructure Planning -George Parrott
June 2014 Executive Coordinator IWCP - Kathy Baker
3 Submission to OIC, 15/07/14 Coordinator Strategic Infrastructure Planning -George Parrott
July 2014 Executive Coordinator IWCP - Kathy Baker
4 Document for Public Exhibition
Coordinator Strategic Infrastructure Planning -George Parrott
Aug 2014 Executive Coordinator IWCP - Kathy Baker
5 Final Endorsed Coordinator Strategic Infrastructure Planning -George Parrott
Nov 2014 Executive Coordinator AIP - Kathy Baker
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Table of Contents
Volume 1 (this volume):
1. Introduction ...................................................................................................................... 1
1.1 Preliminary ................................................................................................................ 1
1.2 Context ..................................................................................................................... 2
1.3 Scope ....................................................................................................................... 2
List of Administrative Definitions ........................................................................................ 3
1.4 Abbreviations and Acronyms .................................................................................... 3
2. Planning Assumptions .................................................................................................... 5
2.1 General ..................................................................................................................... 5
2.2 Planning Horizons ..................................................................................................... 5
2.3 Development categories, types, zones and land uses .............................................. 6
2.4 Population, tourism and employment growth .......................................................... 10
2.5 Future development ................................................................................................ 11
2.6 Infrastructure demand ............................................................................................. 13
2.6.1 General ....................................................................................................... 13
2.6.2 Water Supply ............................................................................................... 13
2.6.3 Sewerage .................................................................................................... 14
3. Priority Infrastructure Area, Catchment Maps and Service Areas ............................. 15
3.1 Priority Infrastructure Area ...................................................................................... 15
3.2 Water Supply Service Area and Catchments .......................................................... 17
3.3 Sewerage Service Area and Catchments ............................................................... 19
4. Desired Standards of Service ....................................................................................... 21
4.1 General ................................................................................................................... 21
4.2 Water Supply .......................................................................................................... 21
4.3 Sewerage ............................................................................................................... 24
5. Plans for Trunk Infrastructure....................................................................................... 24
5.1 General ................................................................................................................... 24
5.2 Trunk and Non-trunk Infrastructure ......................................................................... 25
5.2.1 General ....................................................................................................... 25
5.2.2 Trunk Infrastructure ..................................................................................... 25
5.2.3 Non-trunk Infrastructure ............................................................................... 25
5.2.4 Schedules of Trunk and Non-trunk Infrastructure ........................................ 26
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5.3 Plans for Trunk Infrastructure.................................................................................. 26
5.3.1 General ....................................................................................................... 26
5.3.2 Plans for Trunk Water Supply Infrastructure ................................................ 26
5.3.3 Plans for Trunk Sewerage Infrastructure ..................................................... 27
5.4 Schedules of Works ................................................................................................ 27
5.4.1 General ....................................................................................................... 27
5.4.2 Establishment Cost of Trunk Infrastructure .................................................. 28
5.4.3 Water Supply Schedule of Works ................................................................ 28
5.4.4 Sewerage Schedules of Works .................................................................... 33
6. Financial Analysis.......................................................................................................... 38
7. Extrinsic Material and References ................................................................................ 39
7.1 Extrinsic Material .................................................................................................... 39
7.2 References ............................................................................................................. 41
Annexure 1: Tables of Planning Assumptions
Annexure 2: Indicative Trunk and Non-Trunk Infrastructure Specification for Water Supply and Sewerage Networks
Annexure 3: Schedules of Works for Augmentation of Trunk Water Supply Infrastructure
Annexure 4: Schedules of Works for Augmentation of Trunk Sewerage Infrastructure
Volume 2 (Appendices): A. Growth between 2011 and 2066 – Water Supply Catchments
B. Growth between 2011 and 2066 – Sewerage Catchments
C. Priority Infrastructure Area, Cadastre & City Plan 2015 Zones
D. Water Supply Catchments
E. Sewerage Catchments
F. Plans for Trunk Water Supply Infrastructure
G. Plans for Trunk Sewerage Infrastructure
H. Levels of Development
I. Soil Categories
J. High Water Table Zones
K. Major Transport Routes, Bridges and Waterways
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1. Introduction
1.1 Preliminary
The purpose of this Water Supply and Sewerage Infrastructure Plan is to:
(a) integrate water supply and sewerage infrastructure planning with the land use planning identified in the planning scheme;
(b) provide transparency regarding the City of Gold Coast’s (City’s) intentions for the provision of water supply and sewerage trunk infrastructure;
(c) enable the City to estimate the cost of future water supply and sewerage infrastructure provision to assist its long term financial planning;
(d) ensure that water supply and sewerage trunk infrastructure is planned and provided in an efficient and orderly manner, and
(e) provide a basis for the imposition of conditions about infrastructure on development approvals.
Volume 1 of the Water Supply and Sewerage Infrastructure Plan:
(a) states in Section 2 (Planning Assumptions) the assumptions about future growth and urban development including the assumptions of demand for the water supply and sewerage trunk infrastructure networks;
(b) identifies in Section 3 (Priority Infrastructure Area) the prioritised area to accommodate urban growth up to 2026;
(c) states in Section 4 (Desired Standards of Service) for each trunk infrastructure network the desired standard of performance;
(d) identifies in Section 5 (Plans for Trunk Infrastructure) the existing and future trunk infrastructure for the following networks:
(i) water supply
(ii) sewerage;
(e) provides details of the methodology to determine establishment costs in Section 6 (Establishment Costs), and
(f) provides a list of documents that assist in the interpretation of the Infrastructure Plan in Section 7 (Extrinsic Material and References).
Volume 2 of the Water Supply and Sewerage Infrastructure Plan includes A3-format maps and plans, while Volume 3 includes A3-format Schedules of Works for Augmentation of Trunk Infrastructure.
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1.2 Context
This Infrastructure Plan will be incorporated in the Gold Coast Water Annual Network Services Plan, which is CoGC’s plan that demonstrates satisfactory provision of water supply and sewerage services pursuant to the requirements of section 99BJ of the South East Queensland (Distribution and Retail Restructuring) Water Act 2009. Given that the CoGC has a withdrawn council arrangement under the South East Queensland Water (Distribution and Retail Restructuring) Act 2009, the City is not required to include the water supply and sewerage networks in its Local Government Infrastructure Plan (LGIP). However, CoGC is required to ensure that the planning for water supply and sewerage is consistent with the requirements for the LGIP, and as such, this Infrastructure Plan generally follows the framework (and provides the required information) for an LGIP included in the Statutory guideline 03/14 - Local government infrastructure plans - A guideline for the preparation of local government infrastructure plans under the Sustainable Planning Act 2009 (DSDIP, 2014).
1.3 Scope
It is important to note that the trunk infrastructure identified in this Infrastructure Plan – included in the plans for trunk infrastructure (PFTI) and the associated schedules – is based on high-level planning and associated hydraulic modelling. This planning and modelling has been carried out at a scale that is appropriate for identifying the typical trunk water and sewerage infrastructure required to service the City’s growth at the stated standards of service, and in order to provide the basis for the imposition of conditions about infrastructure on development approvals. For example, the hydraulic modelling carried out to produce this Plan has been limited to the analysis of simplified models that includes all trunk infrastructure, but does not include all non-trunk assets, nor the topography of the terrain beyond the limits of the trunk models. This is why the PFTI and Schedules included in this Infrastructure Plan identify the typical trunk water and sewerage infrastructure, and why it does not address detail-scale issues beyond the scope and scale of the simplified models and the high-level planning for planning horizons no less than 5 years apart. Therefore, the PFTI and Schedules included in this Plan (as well as the simplified trunk models that have been developed) are not intended for purposes that require assessment at a more detailed scale, for example (but not limited to) detailed infrastructure planning, development of fully justified annual capital works programmes and detailed hydraulic analysis for the purposes of undertaking capacity assessments for specific development applications. For detailed-scale assessments, it will be necessary to carry out additional activities such as evaluation of a range of options, detailed assessment of constraints, detailed hydraulic modelling beyond the limits of the trunk model, as well as model calibration and/or monitoring of demands.
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List of Administrative Definitions
Table 1.1 below includes a list of definitions for the purposes of this document.
Table 1.1 Definitions
Term Definition Base date The date from which a local government has estimated its projected
infrastructure demands and costs. Catchment An area for which a local government identifies the infrastructure demand
projections. Demand unit Demand units provide a standard unit of measurement to express
demand on a trunk infrastructure network. Developable area The area of land available for development. It does not include land that
cannot be developed due to constraints such as conservation land, flood affected land or steep slope. Note – For the purpose of a LGIP developable area is usually measured in hectares, developable hectares (dev ha).
Gold Coast Water Annual Network Services Plan (or Netserv Plan)
A distributor-retailer’s plan about its water and wastewater networks and provision of water service and wastewater service pursuant to section 99BJ of the South East Queensland (Distribution and Retail Restructuring) Water Act 2009.
Infrastructure Plan Water Supply and Sewerage Infrastructure Plan (this document) Planning assumptions Assumptions about population and employment growth and the type,
scale, location and timing of future development. Planning Scheme City of Gold Coast City Plan 2015 Projection area An area for which a local government identifies the assumptions about
population and employment growth and future development. Ultimate development The realistic extent of development anticipated to be achieved when a
site (or projection area or infrastructure service catchment) is developed. Urban development Development for urban purposes which includes residential (other than
rural residential), retail, commercial, industrial, community and government related purposes.
Zone A zone defined in the Planning Scheme that states the intended land uses, form, scale and intensity of development within a certain geographic area.
1.4 Abbreviations and Acronyms
Table 1.2 below includes a list of abbreviations and acronyms used in this Infrastructure Plan.
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Table 1.2 Abbreviations and Acronyms
Abbreviation/Acronym Description
ADD Average Day Demand (water demand)
ADWF Average Dry Weather Flow (sewage flow)
CoGC City of Gold Coast
DEWS Department of Energy and Water Supply
DSS Desired standard(s) of service
EP Equivalent persons
GCW Gold Coast Water
IDM Infrastructure Demand Model
kL Kilolitre (unit of volume - one thousand litres)
kW Kilowatt (unit of power)
L/s Litres per second (unit of flow rate)
LGIP Local Government Infrastructure Plan
MDMM Mean Day Maximum Month (water demand)
ML Megalitre (unit of volume - one million litres)
m/s Metres per second (unit of velocity)
Netserv (Plan) Gold Coast Water Annual Network Services Plan
NRW Non-Revenue Water (water demand)
PDA Priority Infrastructure Area
PFTI Plans for Trunk Infrastructure
PD Peak Day (water demand)
PH Peak Hour (water demand)
PIA Priority Infrastructure Area
PWWF Peak Wet Weather Flow (sewage flow)
RW Recycled water
SEQ South East Queensland
SPS Sewage Pump Station
STP Sewage Treatment Plant
WPS Water Pump Station
WTP Water Treatment Plant
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2. Planning Assumptions
2.1 General
The planning assumptions state the assumptions about:
(a) residential and non-residential growth, and
(b) the type, scale, location and timing of future development, including the demand for each of the trunk water supply and sewerage infrastructure networks.
The planning assumptions together with the desired standards of service (Section 4) form the basis for the planning of the trunk infrastructure networks and the determination of the priority infrastructure area. Specifically, the following two documents inform and reflect the planning assumptions:
The Planning Scheme: City Plan 2015 – draft for public consultation (CoGCa 2014) – included in References, Section 7.2
2013 Infrastructure Demand Model - Water & Sewerage Demands – included in List of Extrinsic Material, Section 7.1
The Planning Scheme expresses the type, scale and location of future development within its various Zones, while the 2013 Infrastructure Demand Model - Water & Sewerage Demands report summarises the methodology used to develop the Infrastructure Demand Model (IDM). The IDM was used to apply resident and non-resident population to each lot over time (across all the planning horizons from 2011 to 2066), for the purposes of allocating existing and future demands and flows to the water supply and sewerage infrastructure that reflects population, tourism and employment growth within the service catchments.
2.2 Planning Horizons
The planning assumptions have been prepared for the base date (2011) and the following projection years, to accord with future Australian Bureau of Statistics census years:
Mid 2016 (corresponds to period 2012 – 2016)
Mid 2021 (corresponds to period 2017 – 2021)
Mid 2026 (corresponds to period 2022 – 2026)
Mid 2031 (corresponds to period 2027 – 2031)
Mid 2036 (corresponds to period 2032 – 2036)
Mid 2066 (corresponds to period 2037 – 2066)
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For the purposes of this Infrastructure Plan, ultimate development is assumed to occur within approximately 50 years from the current date – therefore the year 2066 – under the current planning framework. The exception to this is the Southport Priority Development Area (PDA), where it is likely that ultimate development will not yet be achieved by 2066. A likely rate of growth has been developed for the Southport PDA, between the base year and the year 2066, and the projections for Southport PDA (for each of the planning horizons from 2011 to 2066) are included in the planning assumptions for this Infrastructure Plan. Given the above, the year 2066 (rather than the term ‘ultimate development’) will be used in the tables of population projections, schedules of work, and the like.
2.3 Development categories, types, zones and land uses
In order to develop the planning assumptions (and specifically the IDM), the following classification of development category, development type and land use was undertaken:
Each lot was allocated with proportions of residential and non-residential category of development, across all planning horizons.
The following development types were identified:
o Attached Dwelling (also known as Multi-Unit Dwelling)
o Detached Dwelling
o Tourist – Residential
o Commercial
o Community Purpose
o Industry
o Tourist – Non-Residential
o Open Space
o Rural/Non-urban
Typical land uses were also allocated to individual lots The Planning Scheme expresses the type, scale and intensity of possible urban development within its various Zones. The Planning Scheme Zones are shown on the maps included in Appendix C in Volume 2. Table 2.1 below shows the relationship between the development categories, development types, Planning Scheme Zones and typical land uses that have been used to inform and develop the planning assumptions used for this Infrastructure Plan.
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Table 2.1 Relationship between Planning Scheme and Planning Assumptions
Development Category
Planning Scheme Zones (City Plan 2015)
Typical Land Uses
Development Type
Residential Development:
Attached Dwelling (also known as Multi-Unit Dwelling)
Limited Development
Medium Density Residential
Medium Density Residential –Calypso Bay
High Density Residential
Special Purpose – Special Development Area Precinct
Township
Aged care housing
Attached dwellings (townhouses, duplex homes, units)
Community residences (attached)
Residential care facilities
Residential apartments/flats
Retirement housing (attached)
Rooming accommodation
Detached Dwelling Emerging Communities (inside service catchments)
Limited Development
Low Density Residential
Low Density Residential – Large Lot Precinct
Low Density Residential –Calypso Bay
Medium Density Residential
Rural Residential
Rural Residential – Landscape & Environment Precinct
Township (inside service catchments)
Township – Large Lot Precinct (inside service catchments)
Caretaker’s residence
Community residences (detached)
Detached dwellings
Dwellings on small lots
Eco-village homes
Relocatable home parks
Retirement housing (detached)
Tourist – Residential Centre Medium Density Residential High Density Residential
Tourist apartments
Non-residential Development:
Commercial Centre Medium Density Residential High Density Residential Mixed Use Mixed Use – Fringe Business
Bulk retail premises Childcare centres Convenience stores Entertainment venues Food and beverage outlets
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Development Category
Planning Scheme Zones (City Plan 2015)
Typical Land Uses
Development Type
Neighbourhood Centre Neighbourhood Centre – West
Burleigh Historic Township Pct. Special Purpose – Special
Development Area Precinct Township Zone Township Zone – Commercial
Precinct
Medical/veterinary facilities Newsagents Nightclubs/taverns Offices Post offices Shops Sales yards Service stations Showrooms
Community Purpose Community Facilities Innovation Innovation – Bond University
Precinct Innovation – Gold Coast
Cultural Precinct Special Purpose Sport and Recreation
Airports Cemeteries & Crematoriums Community halls Educational establishments Fire stations Government offices Hospitals Indoor sporting facilities Libraries Places of worship Police stations Public Utility uses (water supply,
sewerage, electricity, gas, telecommunications, transport and stormwater drainage)
Railway stations Research centres Sports stadiums
Industry Innovation Low Impact Industry Medium Impact Industry High Impact Industry Special Purpose Waterfront and Marine Industry
Bulk garden supplies Creative industries Environmental industries Fuel depots Garden centres High impact industries Low impact industries Marine industries Medium impact industries Motor vehicle repairs Outdoor storage areas Refuse disposal Refuse transfer station Technology parks Salvage yards
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Development Category
Planning Scheme Zones (City Plan 2015)
Typical Land Uses
Development Type
Sea ports Storage facilities Warehouses Waterfront industry
Tourist – Non-Residential
Centre Medium Density Residential High Density Residential Major Tourism Major Tourism – Wildlife Park
Precinct Major Tourism – Sea World
Precinct
Caravan parks Function facilities Short-term tourist accommodation Theme parks Wildlife parks
Open Space Open Space Special Purpose Sport and Recreation Sport and Recreation – Bond
University Precinct Sport and Recreation – Bundall
Equestrian Precinct
Active recreational activities Animal exercise areas Community gardens Markets Passive recreational areas Sports grounds
Generally Not Serviced with Water Supply:
Rural/Non-urban Conservation Emerging Communities
(outside water supply service catchment)
Extractive Industry Extractive Industry – Indicative
Buffer Major Tourism - Island Resorts Open Space Rural Rural – Landscape &
Environment Precinct Township (outside water supply
service catchment) Township – Large Lot Precinct
(outside water supply service area)
Unzoned
Agricultural land Conservation reserves Farm buildings/houses Flood plains Island resorts National and State Parks Rural industry Quarries
Generally Not Serviced with Sewerage:
Rural/Non-urban Conservation Agricultural land
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Development Category
Planning Scheme Zones (City Plan 2015)
Typical Land Uses
Development Type
Emerging Communities (outside sewerage service catchment)
Extractive Industry Extractive Industry – Indicative
Buffer Major Tourism - Island Resorts Rural Rural – Landscape &
Environment Precinct Rural Residential Rural Residential – Landscape
& Environment Precinct Township (outside sewerage
service area) Township – Large Lot Precinct
(outside sewerage service catchment)
Unzoned
Conservation reserves Farm buildings/houses Flood plains Island resorts National and State Parks Rural industry Rural residential properties Quarries
The detailed methodology used to prepare the planning assumptions and to develop the IDM is included in the IDM Report (part of the extrinsic material – see Section 7).
2.4 Population, tourism and employment growth
For the purposes of developing assumptions for growth in demand for the water supply and sewerage network, resident population, tourism and employment was calculated by the IDM as either resident or non-resident equivalent persons (EP), for each of the planning horizons, for each lot. The resident population, as well as some tourist accommodation (typically tourist apartments that have an occupancy pattern similar to residential use), are categorised as resident population (and a residential EP gets allocated by the IDM), while commercial, industrial, community purpose use, as well as tourist attractions and short-term tourist accommodation are categorised as non-residential, with a non-resident EP allocated by the IDM. A summary of the assumptions for resident population and non-resident EP are included in Table 2.2 below. It should be noted that the IDM (and the EP generated by the IDM) only covers that part of the planning scheme area, that generally aligns with the water supply and sewerage service areas. A summary of the EPs for the water supply and sewerage service areas (per catchment) are summarised in Section 2.6. The EPs in Table 2.2 below and the EPs in Section 2.6 are not an exact match, given that the extent of the IDM’s geographical
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area is slightly larger than the extent of the catchment boundaries – in order to ensure that no lots included within the catchments are not allocated EPs by the IDM.
Table 2.2 Summary of Residential and Non-residential Population Assumptions
Development Category
Assumptions for Residential and Non-residential Population in EP, per planning horizon – by Category
Base year (2011)
2016 2021 2026 2031 2036 2066
Residential 509,077 593,316 665,057 731,091 779,368 871,585 1,016,865
Non-residential
113,700 124,637 152,978 165,577 173,206 180,155 361,858
TOTAL EP 622,777 717,953 818,035 896,668 952,574 1,051,740 1,378,723
Detailed assumptions about growth for each projection area and development type are identified in the tables in Annexure 1 of this volume, as follows:
Table A.1: Residential Development Population (in EP), by Projection Area
Table A.2: Non-residential Development Population (in EP), by Projection Area The projection areas included in Tables A.1 and A.2 (see Annexure 1) are Statistical Areas, Level 2 (SA2), which are one of the spatial units defined under the Australia Statistical Geography Standard (ASGS). As of 2013, the SA2 boundaries were the smallest area for which the State Government calculated existing dwellings and populations, as well as forecasts out to the year 2036. The geographical extent of the SA2 projection areas are shown on the growth maps included in Appendix A (for Water Supply Catchments) and Appendix B (for Sewerage Catchments) in Volume 2. These growth maps also diagrammatically represent the extent of population growth (total of residential and non-residential EP) at a lot level, between the base year (2011) and 2066.
2.5 Future development
The developable area, as it relates to those parts of the planning scheme area that are planned to be serviced with a water supply and sewerage service, is identified on the Service Area and Catchment Maps, shown in Figure 3.2 (for water supply) and Figure 3.3 (for sewerage), in Section 3. The growth assumptions in terms of residential and non-residential EP, for the different development categories and types, are summarised in Table 2.3 below.
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Table 2.3 – Summary of Future Development and Growth Assumptions
Development Category
Assumptions for Future EP Growth per planning horizon – by Development Category and Type
Development Type 2011 EP
2016 EP 2021 EP 2026 EP 2031 EP 2036 EP 2066 EP
EP Growth EP Growth EP Growth EP Growth EP Growth EP Growth
Growth/year Growth/year Growth/year Growth/year Growth/year Growth/year
Residential Development:
Detached Dwellings
306,327
354,087 367,157 385,914 397,079 420,152 475,886
47,760 13,070 18,757 11,165 23,073 55,734
3.12% 0.74% 1.02% 0.58% 1.16% 0.44%
Attached Dwellings
150,620
179,120 230,513 267,672 297,195 359,504 422,515
28,500 51,393 37,159 29,523 62,309 63,011
3.78% 5.74% 3.22% 2.21% 4.19% 0.58%
Tourist Residential
52,130
60,109 67,388 77,505 85,094 91,928 118,463
7,979 7,279 10,117 7,589 6,834 26,535
3.06% 2.42% 3.00% 1.96% 1.61% 0.96%
Totals for Residential Development
509,077 593,316 665,057 731,091 779,368 871,585 1,016,865 84,239 71,741 66,034 48,277 92,217 145,280 3.31% 2.42% 1.99% 1.32% 2.37% 0.56%
Non-residential:
Tourist (non-residential)
22,933
25,075 28,965 29,866 29,172 28,205 45,022
2,142 3,890 901 -694 -967 16,817
1.87% 3.10% 0.62% -0.46% -0.66% 1.99%
Commercial 31,063
36,146 41,653 45,183 47,133 48,535 147,955
5,083 5,507 3,530 1,950 1,402 99,420
3.27% 3.05% 1.69% 0.86% 0.59% 6.83%
Industry 33,819
37,557 43,814 48,837 52,725 57,863 109,722
3,738 6,257 5,023 3,888 5,138 51,859
2.21% 3.33% 2.29% 1.59% 1.95% 2.99%
Community Purpose
25,885
25,860 38,545 41,690 44,177 45,552 59,159
-25 12,685 3,145 2,487 1,375 13,607
-0.02% 9.81% 1.63% 1.19% 0.62% 1.00%
Total Non-residential
113,700 124,637 152,978 165,577 173,206 180,155 361,858 10,937 28,341 12,599 7,629 6,949 181,703 1.92% 4.55% 1.65% 0.92% 0.80% 3.36%
TOTAL EP (Residential & Non-res)
622,777 717,953 818,035 896,668 952,574 1,051,740 1,378,723 95,176 100,082 78,633 55,906 99,166 326,983 3.06% 2.79% 1.92% 1.25% 2.08% 1.04%
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2.6 Infrastructure demand
2.6.1 General
A summary of the projected infrastructure demand for each service catchment is included in the following sections, as follows:
(a) Section 2.6.2 for the water supply network; (b) Section 2.6.3 for the sewerage network.
Information is provided in terms of EP, as well as Average Day Demand (ADD) for the water supply network and Average Dry Weather Flow (ADWF) for the sewerage network. The relationship between EP and ADD is included in Section 4.2, while the relationship between EP and ADWF is included in Section 4.3.
2.6.2 Water Supply
Table 2.4 below summarises the total forecasted EPs (residential and non-residential EP) per water supply catchment.
Table 2.4 Total of Residential and Non-Residential Equivalent Persons per Planning Horizon, per Water Supply Catchment
Water Supply Catchment
Total of Residential & Non- Residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Coolangatta 67,770 70,231 80,011 85,605 88,362 92,523 103,125
Gaven 63,708 83,368 90,527 99,059 109,205 114,938 169,710
Molendinar 321,928 349,337 388,984 426,043 453,842 504,355 630,911
Mudgeeraba 112,352 121,959 131,206 137,827 148,388 164,283 206,090
Pimpama 29,180 58,424 85,187 102,731 104,170 119,403 170,670
Stapylton 29,551 36,100 41,935 45,134 48,078 52,965 95,089
TOTAL 624,488 719,419 817,851 896,399 952,045 1,048,467 1,375,594
Table 2.5 below summarises the forecasted Average Day Demand (ADD) in ML/day, for each of the water supply catchments.
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Table 2.5 Average Day Demand per Planning Horizon, per Water Supply Catchment
Water Supply Catchment
Average Day Demand (ML/d), per planning horizon
2011 2016 2021 2026 2031 2036 2066
Coolangatta 16 17 19 21 21 22 25
Gaven 15 20 22 23 26 27 40
Molendinar 77 84 94 102 109 121 152
Mudgeeraba 27 29 32 33 36 40 50
Pimpama 6 12 18 22 23 26 38
Stapylton 7 9 10 11 11 12 23
TOTAL 149 170 194 213 227 250 328
2.6.3 Sewerage
Table 2.6 below summarises the total forecasted EPs (residential and non-residential EP) per sewerage catchment.
Table 2.6 Total of Residential and Non-Residential Equivalent Persons per Planning Horizon, per Sewerage Catchment
Sewerage Catchment
Total of Residential & Non- Residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Coombabah 286,157 324,846 355,283 388,761 417,779 457,308 613,954
Elanora 94,850 83,702 93,545 84,633 88,145 92,238 95,245
Merrimac 157,324 187,191 209,551 243,739 261,837 292,787 356,024
Pimpama 26,918 55,226 83,426 100,889 102,302 117,512 167,649
Stapylton 25,588 32,013 37,762 40,824 43,719 48,539 90,069
TOTAL 590,837 682,979 779,567 858,845 913,781 1,008,384 1,322,941
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Table 2.7 below summarises forecasts of Average Dry Weather Flow (ADWF) in ML/day for each of the sewerage catchments.
Table 2.7 Average Dry Weather Flow per Planning Horizon, per Sewerage Catchment
Sewerage Catchment
Average Dry Weather Flow (ML/d), per planning horizon
2011 2016 2021 2026 2031 2036 2066
Coombabah 59 67 74 81 87 95 128
Elanora 19 17 19 17 18 19 20
Merrimac 33 39 44 51 55 61 75
Pimpama 6 12 18 21 21 25 35
Stapylton 5 7 8 9 9 10 19
TOTAL 123 142 162 179 191 210 276
3. Priority Infrastructure Area, Catchment Maps and Service Areas
3.1 Priority Infrastructure Area
The priority infrastructure area (PIA) identifies the area prioritised for the provision of trunk infrastructure to service the existing and assumed future urban development up to 2026. A summary map of the PIA is identified in Figure 3.1 overleaf. Detailed maps that describe the PIA at a property boundary scale are included in Appendix C (Volume 2).
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Figure 3.1 Summary Map of Priority Infrastructure Area
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3.2 Water Supply Service Area and Catchments
The extent of the water supply service area is shown in Figure 3.2 overleaf. The water supply service area consists of the following six water supply catchments: Stapylton Pimpama Gaven Molendinar Mudgeeraba Coolangatta
The extent of each of the water supply catchments is also shown in greater detail in Appendix D (Volume 2). Within the water supply service area, lots may have an existing water supply service or may be planned to be provided with a water supply service, except for those Planning Scheme precincts included in Table 3.1 below.
Table 3.1 Areas not planned to be serviced – Water Supply
City Plan 2015 Zones
Conservation
Emerging Communities (outside water supply service catchment)
Extractive Industry
Extractive Industry – Indicative Buffer
Major Tourism - Island Resorts
Open Space
Rural
Rural – Landscape & Environment Precinct
Township (outside water supply service catchment)
Township – Large Lot Precinct (outside water supply service catchment)
Unzoned
CoGC is not required to provide a potable water supply in those areas not planned to be serviced. In the event that CoGC agrees to provide a potable water supply to a development in an area not planned to be serviced, infrastructure charges will be levied and the cost of any additional infrastructure required will be paid by the developer.
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Figure 3.2 Water Supply Service Area and Catchments
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3.3 Sewerage Service Area and Catchments
The extent of the sewerage service area is shown in Figure 3.3 overleaf. The sewerage service area consists of the following five sewerage catchments: Stapylton Pimpama Coombabah Merrimac Elanora
The extent of each of the sewerage catchments is also shown in greater detail in Appendix E (Volume 2). Within the sewerage service area, lots may have an existing sewerage service or may be planned to be provided with a sewerage service, except for those Planning Scheme precincts included in Table 3.2 below.
Table 3.2 Areas not planned to be serviced – Sewerage
City Plan 2015 Zones
Conservation
Emerging Communities (outside sewerage service catchment)
Extractive Industry
Extractive Industry – Indicative Buffer
Major Tourism - Island Resorts
Open Space
Rural
Rural – Landscape & Environment Precinct
Rural Residential
Rural Residential – Landscape & Environment Precinct
Township (outside water supply service catchment)
Township – Large Lot Precinct (outside sewerage service catchment)
Unzoned
CoGC is not required to provide sewerage in those areas not planned to be serviced. In the event that CoGC agrees to provide sewerage to a development in an area not planned to be serviced, infrastructure charges will be levied and the cost of any additional infrastructure required will be paid by the developer.
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Figure 3.3 Sewerage Catchments and Service Area
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4. Desired Standards of Service
4.1 General
This section outlines the desired standards of service (DSS) for the trunk water supply and sewerage infrastructure networks. The DSS for all new and augmented trunk water supply and sewerage infrastructure aligns with the standards of the SEQ Water Supply and Sewerage Design and Construction Code (SEQ WS&S D&C Code) of 2013. It is not generally intended that existing water supply and sewerage infrastructure will be upgraded to meet the standards for new infrastructure in cases where the DSS for new infrastructure are at a higher level than that of past DSS, given that existing infrastructure was planned, designed and constructed in the past, to the standards applicable at the time. In most cases, the DSS of the SEQ WS&S D&C Code is equal or very similar to the earlier DSS standards recommended by the Gold Coast Water Desired Standards of Service Review 2008. However, there is a significant difference between the SEQ WS&S D&C Code for new infrastructure and the Desired Standards of Service Review 2008, in the case of maximum depth of flow in gravity sewers. The DSS used for this Infrastructure Plan therefore generally applies the standards of the SEQ WS&S D&C Code, except for the assessment of the existing infrastructure, where there is a lower standard included in the Desired Standards of Service Review 2008, and this lower standard was then included in the DSS for the existing infrastructure. This is the case regarding the depth of flow for gravity sewers, where different standards apply for the assessment of existing gravity sewers and future gravity sewers, detailed in Section 4.3. This Infrastructure Plan does not include upgrading of existing infrastructure for any reason other than where there is a growth-related reason. Where augmentation of existing infrastructure is required to service future development, then the DSS for new infrastructure (aligning with the SEQ WS&S D&C Code) was applied. Further details specific to the DSS for trunk water supply and sewerage infrastructure are included in Section 4.2 and Section 4.3 respectively.
4.2 Water Supply
This section summarises the key desired standards of service for the water supply network. A specific point of departure from the SEQ WS&S D&C Code was in the application of the peaking factor for peak hour water demand. The SEQ WS&S D&C Code water network design criteria shows a peaking factor of 6.03 for detached dwellings in the Gold Coast, whereas it shows a peaking factor of 4.0 for all the other local government areas in South East Queensland (SEQ), and with very similar Average Day Demand (ADD) per EP. A peak hour peaking factor of 6.03 represents a peak hour demand approximately 50% higher than that of the rest of SEQ. There is no specific data currently available, but it is considered unlikely that
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there will be such a significant difference between the water usage behaviours of the people living in single detached homes in the Gold Coast as compared to those of the rest of SEQ. Therefore, for the purposes of the high level planning undertaken for this Infrastructure Plan, it was decided to adopt the upper range of the peaking factor for peak hour recommended by the Department of Energy and Water Supply Planning Guidelines for Water Supply and Sewerage (DEWS 2014), namely 4.5. This peaking factor of 4.5 (rather than 6.03), is much closer to the factor of 4.0 recommended for design purposes for the rest of the local government areas of SEQ, while still being at the conservative end of the range recommended by the Planning Guidelines for Water Supply and Sewerage. Based on a peaking factor of 4.5 for peak hour and an ADD of 220L/EP/day (plus 20L/EP/day non-revenue water) for the Gold Coast, compared to a peaking factor of 4.0 for peak hour and an ADD of 230L/EP/day (plus 30L/EP/day non-revenue water) for the rest of SEQ, the Gold Coast peak hour demand for detached dwellings equates to 42.1L/EP/hour, compared to 39.6L/EP/hr for the rest of SEQ. This relatively minor difference (6%) is considered to be comparable and reasonable, and a detached dwelling peaking factor of 4.5 for the peak hour is therefore considered appropriate for the Gold Coast, for the purposes of the high level planning undertaken for this Infrastructure Plan. The key DSS used for trunk water supply infrastructure is summarised in Table 4.1.
Table 4.1 Summary of Key DSS used for Trunk Water Supply Infrastructure
Parameter Standard for Infrastructure Plan
Average Day Demand (ADD) 220L/EP/day
Non-revenue Water (NRW) 20L/EP/day (peaking factors are not applied to NRW)
Peaking Factors: Detached Dwelling
Attached Dwelling
Commerce/ Community
Indus. Tourist Open Space
Mean Day Maximum Month/ADD (MDMM/ADD)
1.75 1.27 1.06 1.06 1.76 1.15
Peak Day/ADD (PD/ADD) 2.12 1.45 1.12 1.12 2.51 1.37
Peak Hour/ADD (PH/ADD) 4.5 2.97 2.32 1.54 6.03 2.40
DSS for mains:
Minimum service pressure with reservoirs at min. operating level
22m in the main adjoining property boundary
Maximum service pressure 80m
Maximum allowable velocity in mains
2.5m/s
DSS for Reservoirs:
Ground Level Reservoir Storage Capacity
Operational Storage Capacity:
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Parameter Standard for Infrastructure Plan 3 x (PD – MDMM) + Emergency Storage
Emergency Storage Capacity:
Greater of 4 hours at MDMM, or 0.5ML (and for less than 1000EP: 150kL)
Note: PD and MDMM is in kL/d, and reservoir storage is in kL
Elevated Reservoir Storage Capacity
Minimum Capacity:
6 x (PH – 1/12 MDMM) + 150kL fire flow storage
Where 8 x PH is less than or equal to MDMM, then capacity:
2 x PH + 150kL fire flow storage
Note: PH and MDMM is in kL/d and reservoir storage is in kL
Reservoir duty pump requirements Ground level reservoir, where pump included: MDMM for 20 hours
Elevated reservoir: Pump capacity = PH in L/s
Fire Fighting Requirements*:
Urban area flows Residential: 15L/s for 2 hours
Commercial/Industrial: 30L/s for 4 hours
Rural and small community flows Rural Residential only: 7.5L/s for 2 hours
Rural Commercial/Industrial: 15L/s for 2 hours
Minimum residual mains pressure during fire fighting conditions
• 12m in the main, at the hydrant
• 9m minimum for existing infrastructure in small isolated or high elevation areas
Background demand Residential: 2/3 Peak Hour (and not less than ADD)
Non-residential: Peak Hour for localised Industrial/Commercial or 2/3 PH for whole water supply zone
* Fire fighting requirements were assessed for the existing network only. Where the existing system shows deficiencies in terms of the above DSS for fire fighting requirements, no augmentations were included, given that only growth-related augmentations (not augmentations related to existing deficiencies) are included in this Infrastructure Plan.
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4.3 Sewerage
This section summarises the key desired standards of service (DSS) for the sewerage network. The key DSS used for trunk sewerage infrastructure is summarised in Table 4.2.
Table 4.2 Summary of Key DSS used for Trunk Sewerage Infrastructure
Parameter Standard for Infrastructure Plan
Average dry weather flow (ADWF) per EP, for sewerage network
210L/EP/day
Peak wet weather flow (PWWF) 5 x ADWF
Maximum depth of flow at PWWF for existing gravity mains
Up to 1.0m below manhole level (used as a trigger for augmentation, not a planning/design criterion for new infrastructure)
Maximum depth of flow at PWWF for new/augmented gravity mains
Up to 75% of the pipe diameter
Minimum velocity for gravity sewers 0.7m/s
Pump Station pumping capacity Minimum pumping capacity = PWWF
Pump Station Emergency Storage 4 hours at ADWF
Maximum rising main velocity 3m/s
Minimum rising main velocity 0.75m/s
5. Plans for Trunk Infrastructure
5.1 General
The plans for trunk infrastructure (PFTI) identify the existing and typical planned future trunk infrastructure networks intended to service the existing and assumed development at the desired standard of service, up to 2066. The following sections include:
Definitions and descriptions of trunk and non-trunk infrastructure – Section 5.2
Plans for Trunk Infrastructure – Section 5.3
Schedules of works – Section 5.4
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5.2 Trunk and Non-trunk Infrastructure
5.2.1 General
Definitions of trunk and non-trunk infrastructure are included in Sections 5.2.2 and 5.2.3 below.
5.2.2 Trunk Infrastructure
Infrastructure has to satisfy one of the following criteria in order to be defined as trunk infrastructure:
new infrastructure that is required to perform a higher order, shared function (for example infrastructure linking a community consisting of at least two separate developments or sub-divisions with existing trunk infrastructure), and has a size equal to or greater than the threshold sizes (where provided) in the lists of trunk infrastructure for water supply and sewerage included in Annexure 2, or
augmentation of existing or future infrastructure where the augmentation is required to perform a higher order, shared function, and that has a size equal to or greater than the threshold sizes (where provided) in the lists of trunk infrastructure for water supply and sewerage included in Annexure 2, or
any infrastructure that is identified in the current Water Supply and Sewerage Infrastructure Plan as trunk infrastructure or is included in the current GCW capital program.
5.2.3 Non-trunk Infrastructure
Non-trunk infrastructure is defined as infrastructure that does not perform a higher order, shared function, including (but not exclusive to):
new or augmented infrastructure required due to a single development/subdivision, irrespective of the size or function of the infrastructure, for example new infrastructure required to link a new development with existing trunk infrastructure, or augmentation of existing infrastructure required to serve a new development;
all infrastructure within any new development (i.e. internal reticulation), irrespective of the size of the infrastructure;
all infrastructure in private ownership;
any infrastructure where the proposed timing of the infrastructure is out of sequence with the timing (horizon) included in the current Water Supply and Sewerage Infrastructure Plan, irrespective of whether that infrastructure would otherwise be defined as trunk infrastructure, and
any infrastructure not included in the definition of trunk infrastructure.
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5.2.4 Schedules of Trunk and Non-trunk Infrastructure
Annexure 2 of this volume includes schedules of indicative trunk and non-trunk water supply and sewerage infrastructure.
5.3 Plans for Trunk Infrastructure
5.3.1 General
The future trunk infrastructure identified in the plans for trunk infrastructure (PFTI) are labelled with a unique reference number, to cross reference to the schedule of works tables (see Section 5.4). Future infrastructure for each planning horizon is differentiated on the plans by unique colours, for example red for 2016. Existing trunk infrastructure is also shown on the plans. It should be noted that the planning horizons shown on the PFTI correspond to associated planning periods, as follows:
2016: corresponds to the period 2012 – 2016
2021: corresponds to the period 2017 – 2021
2026: corresponds to the period 2022 – 2026
2031: corresponds to the period 2027 – 2031
2036: corresponds to the period 2032 – 2036
2066: corresponds to the period 2037 – 2066
5.3.2 Plans for Trunk Water Supply Infrastructure
The plans for trunk infrastructure for water supply are included in Volume 2, Appendix F: Plans for Trunk Water Supply Infrastructure. The plans for trunk water supply infrastructure (and the associated schedules of works) have been derived from the planning and hydraulic modelling for each water supply catchments that was done as part of the project to develop this Infrastructure Plan, and are summarised in the following reports (included in the list of Extrinsic Material, Section 7.1):
Stapylton Water Supply Catchment – Modelling Report
Pimpama Water Supply Catchment – Modelling Report
Gaven Water Supply Catchment – Modelling Report
Molendinar Water Supply Catchment – Modelling Report
Mudgeeraba Water Supply Catchment – Modelling Report
Coolangatta Water Supply Catchment – Modelling Report
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It should be noted that the PFTI plans in Appendix F show Class A+ recycled water (RW) assets for the existing system, but there are no Class A+ RW assets for the future horizons. The reason for this is that the City made the decision in December 2013 to switch the supply from Class A+ recycled water to potable water over the next two to three years in order to significantly reduce the operational costs incurred by the Class A+ RW water supply, including energy costs associated with treating RW to a Class A+ standard as well as the very high monitoring/compliance costs. This Infrastructure Plan therefore shows all future water supply infrastructure as potable water supply only, with no Class A+ RW from 2016, and includes the shut-down of the existing Pimpama Recycled Water Treatment Plant before 2016. The Council decision also means that some of the current Class A+ mains will in the future be utilised for other trunk infrastructure, such a dedicated effluent release main from Pimpama to Coombabah.
5.3.3 Plans for Trunk Sewerage Infrastructure
The plans for trunk infrastructure for sewerage are included in Volume 2, Appendix G: Plans for Trunk Sewerage Infrastructure. The plans for trunk sewerage infrastructure (and the associated schedules of works) have been derived from the planning undertaken for the sewage treatment plants, as well as the planning and hydraulic modelling undertaken for each sewerage catchments that was done as part of the project to develop this Infrastructure Plan, and are summarised in the following reports (included in the list of Extrinsic Material, Section 7.1):
Sewage Treatment Plant Growth Planning Report 2013
Stapylton Sewerage Catchment – Modelling Report
Pimpama Sewerage Catchment – Modelling Report
Coombabah Sewerage Catchment (Helensvale District) – Modelling Report
Coombabah Sewerage Catchment (Coombabah District) – Modelling Report
Merrimac Sewerage Catchment (Merrimac East District) – Modelling Report
Merrimac Sewerage Catchment (Merrimac West District) – Modelling Report
Elanora Sewerage Catchment – Modelling Report
5.4 Schedules of Works
5.4.1 General
The Schedules of Works for future trunk infrastructure are included in:
Annexure 3: Schedules of Works for Augmentation of Trunk Water Supply Infrastructure
Annexure 4: Schedules of Works for Augmentation of Trunk Sewerage Infrastructure
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The Schedules of Works provides the following information for each item of future trunk infrastructure identified on the plans:
the service catchment(s) to which it relates;
the relevant planning horizon at which it is required, in order to service the infrastructure demand at the DSS;
a unique reference number, to cross reference to the PFTI plans;
a description of the infrastructure (typically including size and location), and
the estimated establishment cost of the infrastructure. Detailed Schedules of Works, that provide details at an individual asset level, are included in Water and Sewerage Infrastructure Plan 2014 - Detailed Schedules of Works (CoGC, 2014). This document also includes information on
5.4.2 Establishment Cost of Trunk Infrastructure
The Water and Sewerage Infrastructure Plan 2014 - Detailed Schedules of Works (CoGC, 2014) outlines the basis for estimating the establishment cost of future trunk infrastructure. The establishment cost of future trunk infrastructure was generally based on the unit costs outlined in the Unit Rates Report – prepared for Gold Coast Water (Cardno, 2013). In addition to unit rates, adjustment factors that reflect the built and natural environment and that have an influence on the construction of water and sewerage infrastructure were applied to the unit rates in order to determine establishment costs. The adjustment factors including the following:
Levels of development (2011 to 2066) – summarised in Volume 2, Appendix H
Soil categories – summarised in Volume 2, Appendix I
High water table zones – summarised in Volume 2, Appendix J
Major transport routes, bridges and waterways – summarised in Volume 2, Appendix K
Adjustment factors for length of linear infrastructure Cost estimates are based on 2013 establishment costs.
5.4.3 Water Supply Schedule of Works
Schedules of Works for Augmentation of Trunk Water Supply Infrastructure are included in Annexure 3 of this Infrastructure Plan. Summary of Establishment Costs of Trunk Water Supply Infrastructure:
Tables 5.1 to 5.7 below summarise the establishment costs of the future trunk water supply infrastructure, as included in the schedules of works.
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Table 5.1 Summary of Establishment Cost of Trunk Water Supply Infrastructure, for Stapylton Water Supply Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Mains $1,475,645 $0 $0 $0 $0 $191,973
Reservoirs $0 $0 $0 $0 $0 $0
Pump stations $627,838 $0 $0 $0 $0 $0
Control valves $175,842 $0 $0 $0 $0 $45,566
Preparation cost $24,086 $0 $0 $0 $0 $0
Total $2,303,412 $0 $0 $0 $0 $237,539
Table 5.2 Summary of Establishment Cost of Trunk Water Supply Infrastructure, for Pimpama Water Supply Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Mains $3,974,521 $3,114,503 $0 $2,552,701 $81,493 $7,037,416
Reservoirs $0 $0 $0 $883,365 $0 $1,354,545
Pump stations $208,346 $136,217 $0 $123,144 $0 $912,569
Control valves $282,166 $0 $0 $0 $0 $151,890
Preparation cost $38,981 $0 $0 $0 $0 $0
Total $4,504,014 $3,250,721 $0 $3,559,210 $81,493 $9,456,420
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Table 5.3 Summary of Establishment Cost of Trunk Water Supply Infrastructure, for Gaven Water Supply Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Mains $303,240 $845,002 $0 $754,569 $287,901 $0
Reservoirs $0 $0 $0 $0 $0 $0
Pump stations $108,682 $0 $0 $0 $0 $108,682
Control valves $527,526 $0 $0 $45,566 $0 $0
Preparation cost $55,624 $0 $0 $0 $0 $0
Total $995,071 $845,002 $0 $800,135 $287,901 $108,682
Table 5.4 Summary of Establishment Cost of Trunk Water Supply Infrastructure, for Molendinar Water Supply Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Mains $790,923 $136,501 $147,086 $64,003 $2,143,822 $15,781,415
Reservoirs $612,586 $0 $116,070 $0 $0 $0
Pump stations $71,652 $0 $0 $136,217 $0 $0
Control valves $133,487 $0 $0 $45,566 $45,566 $45,566
Preparation cost $233,079 $0 $0 $0 $0 $0
Total $1,841,727 $136,501 $263,156 $245,787 $2,189,388 $15,826,981
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Table 5.5 Summary of Establishment Cost of Trunk Water Supply Infrastructure, for Mudgeeraba Water Supply Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Mains $23,000 $0 $0 $0 $3,181,810 $2,123,210
Reservoirs $2,510,278 $0 $0 $0 $0 $0
Pump stations $0 $139,930 $0 $0 $0 $0
Control valves $0 $0 $0 $0 $0 $0
Preparation cost $81,372 $0 $0 $0 $0 $0
Total $2,614,650 $139,930 $0 $0 $3,181,810 $2,123,210
Table 5.6 Summary of Establishment Cost of Trunk Water Supply Infrastructure, for Coolangatta Water Supply Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Mains $195,461 $223,351 $152,377 $325,644 $45,580 $1,047,670
Reservoirs $1,826,761 $0 $0 $0 $0 $0
Pump stations $0 $0 $0 $0 $0 $0
Control valves $0 $0 $0 $0 $0 $0
Preparation cost $46,858 $0 $0 $0 $0 $0
Total $2,069,081 $223,351 $152,377 $325,644 $45,580 $1,047,670
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Table 5.7 Summary of Establishment Costs of Trunk Water Supply Infrastructure, for all Water Supply Catchments
Catchment Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Stapylton $2,303,412 $0 $0 $0 $0 $237,539
Pimpama $4,504,014 $3,250,721 $0 $3,559,210 $81,493 $9,456,420
Gaven $995,071 $845,002 $0 $800,135 $287,901 $108,682
Molendinar $1,841,727 $136,501 $263,156 $245,787 $2,189,388 $15,826,981
Mudgeeraba $2,614,544 $139,930 $0 $0 $3,181,810 $2,123,210
Coolangatta $2,069,081 $223,351 $152,377 $325,644 $45,580 $1,047,670
Total $14,327,848 $4,595,504 $415,534 $4,930,776 $5,786,173 $28,800,502
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5.4.4 Sewerage Schedules of Works
Schedules of Works for Augmentation of Trunk Sewerage Infrastructure are included in Annexure 4 of this Infrastructure Plan. Summary of Establishment Costs of Trunk Sewerage Infrastructure:
Tables 5.8 to 5.13 below summarise the establishment costs of the future trunk sewerage infrastructure, as included in the schedules of works.
Table 5.8 Summary of Establishment Cost of Trunk Sewerage Infrastructure, for Stapylton Sewerage Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Category 1
STP proportion $24,953,106 $0 $19,589,113 $0 $0 $23,765,092
Long Term Release proportion
$598,564 $6,748,999 $532,856 $4,233,907 $0 $103,329
Pimpama-Coombabah Release Main proportion
$477,045 $5,141,375 $1,843,681 $0 $0 $1,328,049
Category 2
Gravity sewers $10,440,504 $10,452,452 $0 $0 $0 $11,864,841
Rising mains $16,857,909 $47,218,072 $507,519 $0 $0 $408,862
Pump stations $6,238,544 $3,905,886 $388,666 $0 $0 $3,285,340
Preparation cost $32,811 $0 $0 $0 $0 $0
Total $59,598,482 $73,466,784 $22,861,834 $4,233,907 $0 $40,755,513
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Table 5.9 Summary of Establishment Cost of Trunk Sewerage Infrastructure, for Pimpama Sewerage Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Category 1
STP proportion $43,046,894 $0 $48,410,887 $0 $0 $44,234,908
Long Term Release proportion
$1,032,590 $14,910,279 $1,316,855 $9,907,298 $0 $192,330
Pimpama-Coombabah Release Main proportion
$822,955 $11,358,625 $4,556,319 $0 $0 $2,471,951
Category 2
Gravity sewers $8,198,745 $1,790,777 $716,989 $344,240 $1,108,104 $293,420
Rising mains $3,414,372 $0 $0 $0 $1,343,248 $3,814,626
Pump stations $2,922,803 $0 $0 $0 $1,363,886 $1,688,647
Preparation cost $56,602 $0 $0 $0 $0 $0
Total $59,494,962 $28,059,681 $55,001,049 $10,251,538 $3,815,239 $52,695,882
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Table 5.10 Summary of Establishment Cost of Trunk Sewerage Infrastructure, for Coombabah Sewerage Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Category 1
STP proportion $10,000,000 $74,000,000 $70,000,000 $0 $100,000,000 $154,000,000
Long Term Release proportion
$6,073,817 $63,497,815 $5,074,307 $40,459,238 $0 $704,341
Pimpama-Coombabah Release Main proportion
$0 $0 $0 $0 $0 $0
Category 2
Helensvale District:
Gravity sewers $1,468,969 $0 $0 $160,711 $0 $15,748,637
Rising mains $0 $0 $2,869,554 $2,149,031 $0 $6,081,903
Pump stations $7,520,429 $310,637 $0 $1,608,028 $625,286 $5,529,902
Coombabah District:
Gravity sewers $0 $209,300 $853,379 $736,437 $6,479,791 $14,694,115
Rising mains $9,019,075 $287,322 $475,632 $139,742 $2,909,376 $11,101,759
Pump stations $11,550,283 $636,129 $6,293,280 $624,442 $7,050,475 $34,229,284
Preparation cost $332,942 $0 $0 $0 $0 $0
Total $45,965,515 $138,941,203 $85,566,153 $45,877,628 $117,064,928 $242,089,941
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Table 5.11 Summary of Establishment Cost of Trunk Sewerage Infrastructure, for Merrimac Sewerage Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Category 1
STP proportion $0 $2,000,000 $143,000,000 $0 $68,000,000 $68,000,000
Long Term Release proportion
$3,500,009 $40,974,929 $4,135,887 $4,127,512 $0 $0
Pimpama-Coombabah Release Main proportion
$1,032,590 $14,910,279 $1,316,855 $9,907,298 $0 $192,330
Category 2
Merrimac East District:
Gravity sewers $1,557,573 $0 $0 $0 $5,109,522 $15,746,807
Rising mains $664,298 $0 $3,583,918 $0 $117,202 $97,063
Pump stations $2,680,990 $0 $1,270,774 $800,379 $638,318 $2,025,543
Merrimac West District:
Gravity sewers $8,018,451 $0 $190,952 $0 $6,177,272 $3,005,722
Rising mains $18,495,704 $0 $0 $0 $2,214,888 $33,928
Pump stations $10,229,227 $614,061 $1,476,199 $249,341 $2,523,069 $10,217,491
Preparation cost $191,856 $0 $0 $0 $0 $0
Total $46,370,697 $58,499,269 $154,974,585 $15,084,530 $84,780,270 $99,318,884
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Table 5.12 Summary of Establishment Cost of Trunk Sewerage Infrastructure, for Elanora Sewerage Catchment
Network components
Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Category 1
STP proportion $0 $0 $0 $0 $9,400,000 $36,000,000
Long Term Release proportion
$1,565,020 $18,291,489 $1,436,096 $1,389,489 $0 $0
Pimpama-Coombabah Release Main proportion
$0 $0 $0 $0 $0 $0
Category 2
Gravity sewers $0 $0 $0 $0 $0 $0
Rising mains $6,043,088 $0 $0 $0 $0 $4,555,925
Pump stations $1,785,231 $127,718 $280,086 $0 $0 $2,053,901
Preparation cost $85,788 $0 $0 $0 $0 $0
Total $9,479,128 $18,419,206 $1,716,181 $1,389,489 $9,400,000 $42,609,825
Table 5.13 Summary of Establishment Costs of Trunk Sewerage Infrastructure, for all Sewerage Catchments
Catchment Establishment cost by planning horizon ($ 2013)
2016 2021 2026 2031 2036 2066
Stapylton $59,598,482 $73,466,784 $22,861,834 $4,233,907 $0 $40,755,513
Pimpama $59,494,962 $28,059,681 $55,001,049 $10,251,538 $3,815,239 $52,695,882
Coombabah $45,965,515 $138,941,203 $85,566,153 $45,877,628 $117,064,928 $242,089,941
Merrimac $46,370,697 $58,499,269 $154,974,585 $15,084,530 $84,780,270 $99,318,884
Elanora $9,479,128 $18,419,206 $1,716,181 $1,389,489 $9,400,000 $42,609,825
Total $220,908,783 $317,386,143 $320,119,803 $76,837,092 $215,060,436 $477,470,045
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6. Financial Analysis The financial analysis undertaken, using the Department of State Development and Infrastructure Planning methodology, indicates that there will be sufficient cash flow to deliver the capital works required to service growth. The modelling is reliant on the anticipated dwelling and floor space growth; however in recent years the City has not realised this growth and as such the revenue from infrastructure charges has been less than anticipated in the model. The City reviews the timing and location of the capital works program identified in the Water and Sewerage Infrastructure Plan 2014 to ensure that infrastructure is only provided as it is required. Another factor that dramatically affects the financial modelling and the ability of the City to fund growth infrastructure is the establishment costs of the infrastructure. While costs are indexed by a ten (10) year average producers price index (PPI) the contract price at the time of construction can vary significantly depending on the market. The City’s Water and Sewerage business is economically regulated by the Queensland Competition Authority (QCA) where all revenue and costs are reviewed to ensure the business does not recover more than the maximum allowable revenue determined by the QCA. To this end the fluctuations in cash flows from infrastructure charges are managed by balancing it with revenue from water and sewerage fees and charges.
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7. Extrinsic Material and References
7.1 Extrinsic Material
The documents identified in Table 7.1 below assist in the interpretation of the LGIP – Water Supply and Sewerage Networks, and are extrinsic material under the Statutory Instruments Act 1992.
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Table 7.1 List of Extrinsic Material
Title of document Date Organisation
that prepared document
CoGC doc. ref. number
2013 Infrastructure Demand Model - Water & Sewerage Demands
July ‘14 CoGC (GCW) #42751898
Sewage Treatment Plant Growth Planning Report 2013 July ‘14 CoGC (GCW) #41972165
Stapylton Water Supply Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43497200
Pimpama Water Supply Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43559277
Gaven Water Supply Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43532264
Molendinar Water Supply Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43999522
Mudgeeraba Water Supply Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43999457
Coolangatta Water Supply Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43999337
Stapylton Sewerage Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #44009038
Pimpama Sewerage Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43994225
Coombabah Sewerage Catchment (Helensvale District) – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43999276
Coombabah Sewerage Catchment (Coombabah District) – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43993113
Merrimac Sewerage Catchment (Merrimac East District) – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43999138
Merrimac Sewerage Catchment (Merrimac West District) – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #44110650
Elanora Sewerage Catchment – Hydraulic Modelling Report 2014
July ‘14 CoGC (GCW) #43999241
Unit Rates Report – prepared for Gold Coast Water July ‘14 Cardno #40226150
Water and Sewage Infrastructure Plan 2014: Detailed Cost Analysis: Method and results
July ‘14 CoGC (GCW) #45680604
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7.2 References
City of Gold Coast (CoGC), 2014, Draft City Plan 2015 – Public Consultation http://cityplan.goldcoast.qld.gov.au/Pages/plan/viewer.aspx?vid=10107 Department of Energy and Water Supply, 2014, Planning Guidelines for Water Supply and Sewerage, April 2010 (Chapter 6 amended March 2014). Department of State Development, Infrastructure and Planning (DSDIP), 2014, Statutory guideline 03/14 - Local government infrastructure plans - A guideline for the preparation of local government infrastructure plans under the Sustainable Planning Act 2009, June 2014. State of Queensland, 2014, South East Queensland (Distributor Retailer Restructure) Water Act 2009, May 2014. Water Service Association of Australia (WSAA), 2013, SEQ Water Supply and Sewerage Design and Construction Code (SEQ WS&S D&C Code), July 2013.
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Annexure 1: Tables of Planning Assumptions
Table A.1: Residential Development Population (in EP), by Projection Area
Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Broadbeach Waters Detached Dwelling 7,267 7,279 7,338 9,777 10,172 10,271 10,271
Attached Dwelling 1,142 1,145 1,156 1,246 1,246 1,272 1,272
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 8,409 8,425 8,495 11,023 11,418 11,543 11,543
Burleigh Heads Detached Dwelling 2,868 2,977 2,697 2,558 2,558 2,558 2,558
Attached Dwelling 5,514 5,852 6,934 8,015 8,014 8,014 8,114
Tourist Residential 47 45 317 370 390 390 390
Total Residential EP, per SA2 8,429 8,873 9,948 10,942 10,962 10,962 11,062
Burleigh Waters Detached Dwelling 10,239 10,239 10,239 10,239 10,260 12,385 12,657
Attached Dwelling 3,366 3,724 3,724 3,724 4,765 4,765 6,192
Tourist Residential 180 180 180 180 0 0 0
Total Residential EP, per SA2 13,785 14,143 14,143 14,143 15,025 17,150 18,849
Mermaid Beach - Broadbeach Detached Dwelling 1,688 1,680 20 109 109 107 107
Attached Dwelling 2,970 3,609 8,381 8,760 9,059 9,155 9,155
Tourist Residential 9,981 11,186 13,940 15,488 16,449 16,449 17,650
Total Residential EP, per SA2 14,640 16,474 22,341 24,358 25,617 25,711 26,913
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Mermaid Waters Detached Dwelling 8,989 8,989 9,074 9,338 9,222 10,156 13,219
Attached Dwelling 3,646 3,654 3,654 4,114 4,664 4,664 4,799
Tourist Residential 109 109 109 109 109 109 109
Total Residential EP, per SA2 12,744 12,753 12,838 13,562 13,995 14,929 18,128
Miami Detached Dwelling 2,978 2,981 2,988 2,860 2,494 2,127 2,146
Attached Dwelling 3,810 3,833 4,086 4,363 5,076 6,268 6,455
Tourist Residential 17 17 15 303 303 303 300
Total Residential EP, per SA2 6,805 6,831 7,089 7,526 7,872 8,698 8,902
Coolangatta Detached Dwelling 1,047 1,068 683 650 650 650 650
Attached Dwelling 2,490 2,807 3,948 4,146 4,146 4,146 4,146
Tourist Residential 4,889 4,887 5,370 5,405 5,405 5,405 6,123
Total Residential EP, per SA2 8,427 8,762 10,000 10,201 10,201 10,201 10,919
Currumbin - Tugun Detached Dwelling 5,422 5,573 4,790 4,300 4,068 4,079 4,108
Attached Dwelling 4,992 5,071 7,136 8,210 8,687 9,088 9,141
Tourist Residential 4 376 1,302 2,250 3,139 3,142 3,142
Total Residential EP, per SA2 10,417 11,020 13,228 14,761 15,894 16,309 16,391
Currumbin Waters Detached Dwelling 7,673 7,911 8,180 8,495 8,603 8,853 9,330
Attached Dwelling 1,876 1,919 2,952 2,952 2,952 2,952 2,952
Tourist Residential 0 0 0 0 0 0 0
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Total Residential EP, per SA2 9,549 9,829 11,132 11,447 11,556 11,805 12,282
Elanora Detached Dwelling 10,560 10,567 10,623 10,623 10,625 10,625 10,653
Attached Dwelling 1,781 1,781 1,781 1,781 1,781 1,781 2,283
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 12,341 12,348 12,404 12,404 12,406 12,406 12,936
Palm Beach Detached Dwelling 8,516 8,543 8,032 6,596 6,256 7,084 7,084
Attached Dwelling 6,397 6,726 9,625 13,684 13,966 14,666 15,007
Tourist Residential 32 48 821 827 2,161 3,394 3,394
Total Residential EP, per SA2 14,945 15,318 18,479 21,108 22,383 25,144 25,485
Arundel Detached Dwelling 8,283 8,283 8,283 8,283 8,283 8,283 11,699
Attached Dwelling 1,972 1,972 1,972 1,972 1,972 1,972 1,982
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 10,254 10,254 10,254 10,254 10,254 10,254 13,681
Biggera Waters Detached Dwelling 2,061 2,051 2,066 2,099 1,618 1,229 1,365
Attached Dwelling 4,162 4,626 5,164 6,372 7,863 11,406 15,763
Tourist Residential 9 9 6 567 567 567 1,043
Total Residential EP, per SA2 6,232 6,686 7,236 9,039 10,048 13,203 18,172
Parkwood Detached Dwelling 8,492 8,506 8,506 8,509 8,509 8,509 12,390
Attached Dwelling 720 720 720 720 720 720 715
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 9,212 9,226 9,226 9,229 9,229 9,229 13,106
Coombabah Detached Dwelling 4,617 4,614 4,614 4,566 4,550 3,896 3,403
Attached Dwelling 4,875 5,253 5,253 5,363 6,086 7,738 11,290
Tourist Residential 801 801 801 801 598 598 50
Total Residential EP, per SA2 10,292 10,668 10,668 10,730 11,233 12,232 14,743
Labrador Detached Dwelling 4,789 4,790 4,977 4,986 4,362 3,515 3,792
Attached Dwelling 11,950 12,184 12,698 12,909 14,338 17,257 17,327
Tourist Residential 11 38 108 533 1,049 1,377 1,377
Total Residential EP, per SA2 16,750 17,012 17,783 18,428 19,749 22,150 22,497
Paradise Point - Hollywell Detached Dwelling 6,655 6,630 6,630 7,338 6,983 6,438 7,239
Attached Dwelling 2,496 3,156 3,859 4,110 5,026 7,191 7,843
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 9,151 9,786 10,489 11,448 12,009 13,628 15,082
Oxenford - Maudsland Detached Dwelling 11,356 12,044 12,044 12,044 12,380 13,089 15,700
Attached Dwelling 2,469 3,081 3,081 3,081 3,081 3,143 4,330
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 13,824 15,125 15,125 15,125 15,461 16,232 20,030
Pimpama Detached Dwelling 1,829 10,560 14,842 15,386 15,386 15,386 25,064
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Attached Dwelling 618 1,326 7,256 7,334 7,334 7,334 10,236
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 2,447 11,886 22,098 22,720 22,720 22,720 35,300
Upper Coomera - Willow Vale Detached Dwelling 14,493 30,706 30,723 30,853 30,860 30,860 37,506
Attached Dwelling 2,644 2,257 2,485 2,557 2,557 2,584 5,725
Tourist Residential 7 7 7 7 7 7 3
Total Residential EP, per SA2 17,144 32,970 33,215 33,417 33,424 33,451 43,234
Clear Island Waters Detached Dwelling 2,993 2,996 3,167 3,309 3,336 3,539 5,538
Attached Dwelling 1,494 1,494 1,501 1,501 1,510 3,178 3,178
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 4,487 4,490 4,668 4,810 4,846 6,718 8,717
Merrimac Detached Dwelling 3,558 3,566 3,604 4,447 4,500 4,008 4,567
Attached Dwelling 2,779 2,779 2,779 2,812 2,810 4,629 4,814
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 6,337 6,345 6,383 7,259 7,310 8,637 9,381
Robina Detached Dwelling 15,794 15,856 15,872 16,725 16,191 19,786 19,786
Attached Dwelling 5,984 8,712 10,078 11,103 16,352 19,812 20,504
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 21,778 24,568 25,950 27,827 32,544 39,598 40,289
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Varsity Lakes Detached Dwelling 9,136 6,689 6,666 7,273 5,447 5,808 5,808
Attached Dwelling 5,302 11,051 15,398 16,593 22,050 24,386 26,105
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 14,438 17,741 22,064 23,866 27,497 30,194 31,913
Ashmore Detached Dwelling 9,175 9,254 9,573 10,531 10,508 11,935 12,810
Attached Dwelling 3,110 3,136 3,155 3,221 4,036 4,036 4,595
Tourist Residential 3 3 3 3 0 0 0
Total Residential EP, per SA2 12,287 12,392 12,731 13,755 14,545 15,971 17,405
Molendinar Detached Dwelling 5,645 5,645 5,650 5,650 5,650 5,653 5,653
Attached Dwelling 880 880 880 880 880 880 880
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 6,525 6,525 6,531 6,531 6,531 6,533 6,533
Runaway Bay Detached Dwelling 5,424 5,413 5,410 5,593 5,525 4,878 5,492
Attached Dwelling 3,536 4,059 4,094 4,170 4,803 6,538 8,510
Tourist Residential 4 4 4 4 3 3 0
Total Residential EP, per SA2 8,964 9,476 9,508 9,767 10,331 11,419 14,001
Guanaba - Springbrook Detached Dwelling 14 14 14 14 14 14 16
Attached Dwelling 0 0 0 0 0 0 0
Tourist Residential 0 0 0 0 0 0 0
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Total Residential EP, per SA2 14 14 14 14 14 14 16
Currumbin Valley - Tallebudgera
Detached Dwelling 4,382 4,393 4,414 4,414 4,512 4,787 5,107
Attached Dwelling 409 409 419 419 419 419 419
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 4,792 4,802 4,832 4,832 4,930 5,205 5,525
Mudgeeraba - Bonogin Detached Dwelling 14,189 14,514 14,514 14,514 14,514 16,105 21,290
Attached Dwelling 2,684 2,744 2,744 2,744 2,744 2,744 3,118
Tourist Residential 3 3 3 3 3 3 3
Total Residential EP, per SA2 16,877 17,261 17,261 17,261 17,261 18,852 24,411
Reedy Creek - Andrews Detached Dwelling 4,016 5,128 5,128 5,128 5,537 5,950 7,002
Attached Dwelling 1,969 1,971 1,971 1,971 1,971 2,132 2,886
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 5,985 7,099 7,099 7,099 7,507 8,082 9,888
Carrara Detached Dwelling 7,046 8,732 9,291 10,015 10,821 11,684 14,217
Attached Dwelling 5,085 6,501 6,907 6,929 6,920 6,929 6,939
Tourist Residential 15 15 15 15 15 6 6
Total Residential EP, per SA2 12,146 15,248 16,213 16,958 17,756 18,619 21,161
Highland Park Detached Dwelling 7,696 7,699 7,699 7,699 8,373 10,964 10,964
Attached Dwelling 923 923 923 923 923 923 923
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Tourist Residential 370 370 370 370 370 0 0
Total Residential EP, per SA2 8,989 8,992 8,992 8,992 9,666 11,887 11,887
Nerang - Mount Nathan Detached Dwelling 14,098 15,747 16,180 17,689 20,745 24,490 24,490
Attached Dwelling 5,090 5,090 5,090 5,103 6,178 11,103 12,380
Tourist Residential 162 162 162 162 160 0 0
Total Residential EP, per SA2 19,350 20,998 21,432 22,955 27,083 35,593 36,870
Pacific Pines - Gaven Detached Dwelling 11,745 11,780 11,833 11,833 11,768 14,391 8,625
Attached Dwelling 1,778 7,318 8,118 8,118 8,289 8,662 24,971
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 13,524 19,098 19,951 19,951 20,057 23,053 33,596
Worongary - Tallai Detached Dwelling 7,389 7,642 10,884 14,798 16,608 16,608 16,608
Attached Dwelling 325 339 526 752 856 856 856
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 7,713 7,981 11,411 15,550 17,465 17,465 17,465
Coomera Detached Dwelling 1,438 11,744 11,742 11,730 11,730 11,749 15,929
Attached Dwelling 4,166 4,645 16,563 30,689 30,689 45,535 54,113
Tourist Residential 2 2 2 280 280 280 280
Total Residential EP, per SA2 5,606 16,391 28,307 42,699 42,699 57,565 70,322
Helensvale Detached Dwelling 13,714 14,906 16,403 19,185 24,923 28,305 28,305
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Attached Dwelling 2,889 4,182 4,182 4,913 5,056 6,040 8,390
Tourist Residential 3 3 3 0 0 0 0
Total Residential EP, per SA2 16,606 19,091 20,588 24,098 29,979 34,345 36,694
Hope Island Detached Dwelling 1,566 2,005 2,656 3,668 4,494 4,494 4,494
Attached Dwelling 6,163 7,180 9,703 12,603 13,754 13,754 13,754
Tourist Residential 10 10 10 10 10 10 10
Total Residential EP, per SA2 7,738 9,195 12,368 16,281 18,258 18,258 18,258
Jacobs Well - Alberton Detached Dwelling 2,084 2,537 2,811 2,811 2,811 2,811 3,406
Attached Dwelling 530 530 4,017 4,017 4,017 4,017 4,367
Tourist Residential 5 5 5 5 5 5 5
Total Residential EP, per SA2 2,619 3,072 6,833 6,833 6,833 6,833 7,778
Ormeau - Yatala Detached Dwelling 11,609 17,157 19,701 19,701 19,819 20,144 24,932
Attached Dwelling 1,837 1,819 1,854 1,854 1,854 2,265 2,479
Tourist Residential 340 190 190 190 190 190 187
Total Residential EP, per SA2 13,786 19,166 21,745 21,745 21,863 22,599 27,598
Southport Detached Dwelling 11,603 11,947 12,604 12,604 12,619 11,180 18,654
Attached Dwelling 18,587 23,305 26,533 33,388 39,827 56,595 64,298
Tourist Residential 0 0 0 0 0 74 74
Total Residential EP, per SA2 30,190 35,252 39,138 45,993 52,447 67,849 83,026
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Benowa Detached Dwelling 5,723 5,868 6,904 7,195 7,423 9,294 9,777
Attached Dwelling 2,474 2,500 2,497 2,547 2,900 2,900 2,900
Tourist Residential 26 26 23 21 21 21 21
Total Residential EP, per SA2 8,224 8,395 9,424 9,763 10,344 12,215 12,698
Bundall Detached Dwelling 3,337 3,373 3,763 4,514 5,424 5,424 5,424
Attached Dwelling 1,183 1,179 1,237 1,292 1,292 1,292 2,645
Tourist Residential 0 0 0 0 0 0 0
Total Residential EP, per SA2 4,521 4,552 5,000 5,806 6,716 6,716 8,069
Main Beach Detached Dwelling 211 205 105 3 3 3 3
Attached Dwelling 226 243 837 1,041 1,041 1,041 1,041
Tourist Residential 3,235 3,357 3,294 3,301 3,301 3,301 3,301
Total Residential EP, per SA2 3,672 3,805 4,236 4,345 4,345 4,345 4,345
Surfers Paradise Detached Dwelling 2,920 3,286 3,218 5,260 5,836 6,047 6,047
Attached Dwelling 1,328 1,437 2,642 2,677 2,689 2,722 2,722
Tourist Residential 31,864 38,257 40,329 46,301 50,559 56,293 80,993
Total Residential EP, per SA2 36,113 42,979 46,188 54,237 59,085 65,063 89,763
Inside priority infrastructure area (within IDM extent)
Detached Dwelling 304,128 348,134 361,197 379,954 391,085 414,085 468,599
Attached Dwelling 150,135 178,636 228,459 265,619 295,141 357,451 420,464
Tourist Residential 52,127 60,106 67,384 77,501 85,091 91,925 118,460
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Projection area (SA2) Development type Existing and projected residential EP, per planning horizon
2011 2016 2021 2026 2031 2036 2066
Total Residential EP inside PIA 506,390 586,876 657,040 723,074 771,317 863,461 1,007,523
Outside priority infrastructure area (within IDM extent)
Detached Dwelling 2,199 5,953 5,960 5,960 5,994 6,067 7,287
Attached Dwelling 485 484 2,054 2,053 2,054 2,053 2,051
Tourist Residential 3 3 4 4 3 3 3
Total Residential EP outside PIA 2,687 6,440 8,017 8,017 8,051 8,124 9,342
City of Gold Coast (within IDM extent)
Detached Dwelling 306,327 354,087 367,157 385,914 397,079 420,152 475,886
Attached Dwelling 150,620 179,120 230,513 267,672 297,195 359,504 422,515
Tourist Residential 52,130 60,109 67,388 77,505 85,094 91,928 118,463
Total Residential EP 509,077 593,316 665,057 731,091 779,368 871,585 1,016,865
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Table A.2: Non-residential Development Population (in EP), by Projection Area
Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Broadbeach Waters Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 1732 1840 2022 2189 2190 2190 5141
Industry 0 0 0 0 0 0 0
Community Purpose 43 45 94 99 99 99 266
Total Non-Res EP per SA2 1776 1884 2116 2289 2289 2290 5407
Burleigh Heads Tourist (non-residential) 79 290 578 745 789 840 1694
Commercial 1207 1185 1232 1259 1268 1268 1850
Industry 3426 3538 3708 3796 3817 3918 5367
Community Purpose 303 258 306 351 358 358 614
Total Non-Res EP per SA2 5016 5272 5824 6151 6233 6384 9524
Burleigh Waters Tourist (non-residential) 110 111 118 118 73 73 1
Commercial 832 847 850 863 868 868 6973
Industry 154 261 264 266 267 270 308
Community Purpose 551 444 444 444 444 444 447
Total Non-Res EP per SA2 1647 1663 1676 1691 1651 1655 7729
Mermaid Beach - Broadbeach
Tourist (non-residential) 1926 2158 2144 2052 2052 1997 2247
Commercial 938 692 710 715 715 715 739
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Industry 62 70 72 73 73 73 83
Community Purpose 300 572 572 572 572 572 571
Total Non-Res EP per SA2 3227 3492 3497 3411 3412 3357 3639
Mermaid Waters Tourist (non-residential) 0 0 0 0 0 0 62
Commercial 1311 2626 2658 2663 2661 2661 2860
Industry 138 147 147 147 147 147 148
Community Purpose 309 311 331 364 368 368 504
Total Non-Res EP per SA2 1758 3084 3136 3174 3177 3177 3574
Miami Tourist (non-residential) 0 82 191 168 170 175 181
Commercial 991 995 1005 1012 1012 1012 1028
Industry 194 214 218 220 221 223 252
Community Purpose 197 187 190 193 193 193 193
Total Non-Res EP per SA2 1381 1478 1605 1592 1596 1603 1653
Coolangatta Tourist (non-residential) 1238 1243 1253 1253 1255 1267 2032
Commercial 51 51 51 51 51 51 51
Industry 23 23 23 23 23 23 23
Community Purpose 136 143 159 170 174 177 214
Total Non-Res EP per SA2 1448 1460 1486 1497 1503 1519 2319
Currumbin - Tugun Tourist (non-residential) 549 875 1601 1787 1540 1759 3086
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Commercial 450 304 310 306 307 307 380
Industry 1633 1643 1646 1647 1647 1647 1651
Community Purpose 1682 1898 2217 2591 2959 3335 6593
Total Non-Res EP per SA2 4315 4721 5774 6332 6454 7048 11710
Currumbin Waters Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 123 102 102 102 102 102 102
Industry 899 1044 1230 1338 1388 1475 1618
Community Purpose 129 142 197 274 325 369 376
Total Non-Res EP per SA2 1151 1288 1529 1714 1815 1946 2096
Elanora Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 379 379 379 380 381 382 1291
Industry 0 0 0 0 0 0 0
Community Purpose 943 906 974 1030 1069 1086 1120
Total Non-Res EP per SA2 1322 1285 1354 1410 1450 1468 2411
Palm Beach Tourist (non-residential) 0 262 606 688 584 398 1136
Commercial 767 753 821 830 838 830 1613
Industry 8 8 8 8 8 8 8
Community Purpose 513 499 532 575 575 575 711
Total Non-Res EP per SA2 1288 1522 1967 2101 2006 1812 3467
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Arundel Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 171 160 161 162 162 162 350
Industry 1121 1331 1851 2272 2685 3119 5885
Community Purpose 1209 1246 1337 1925 2372 2757 4050
Total Non-Res EP per SA2 2501 2737 3349 4358 5219 6039 10285
Biggera Waters Tourist (non-residential) 488 488 488 568 568 539 457
Commercial 844 948 1031 1096 1138 1182 10348
Industry 797 814 957 1026 1052 1140 1525
Community Purpose 76 76 76 76 76 78 80
Total Non-Res EP per SA2 2205 2327 2551 2765 2833 2939 12410
Parkwood Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 252 255 258 262 265 265 352
Industry 68 68 68 68 68 68 68
Community Purpose 141 147 160 172 172 172 182
Total Non-Res EP per SA2 462 470 486 502 505 505 602
Coombabah Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 21 19 19 19 19 19 53
Industry 1117 1185 1241 1251 1257 1262 1487
Community Purpose 1099 1132 1211 1283 1360 1436 1470
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Total Non-Res EP per SA2 2236 2337 2471 2553 2636 2717 3010
Labrador Tourist (non-residential) 35 326 1051 1182 1158 1041 1628
Commercial 458 446 462 468 469 470 514
Industry 67 61 61 61 61 61 61
Community Purpose 497 491 494 495 495 513 521
Total Non-Res EP per SA2 1056 1324 2067 2206 2183 2086 2725
Paradise Point - Hollywell Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 195 289 364 366 366 366 361
Industry 85 92 110 111 111 111 159
Community Purpose 114 99 100 100 100 101 104
Total Non-Res EP per SA2 394 480 574 577 577 578 624
Oxenford - Maudsland Tourist (non-residential) 2147 2150 2156 2165 2165 2165 4977
Commercial 359 378 382 382 383 383 2284
Industry 43 44 44 44 44 44 44
Community Purpose 193 193 206 217 219 219 605
Total Non-Res EP per SA2 2742 2765 2788 2809 2811 2811 7910
Pimpama Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 29 44 80 213 241 282 957
Industry 10 0 0 95 104 115 373
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Community Purpose 45 387 826 1014 1020 1028 1322
Total Non-Res EP per SA2 83 431 907 1321 1364 1425 2653
Upper Coomera - Willow Vale
Tourist (non-residential) 0 0 0 0 0 0 1
Commercial 432 440 526 563 613 828 1385
Industry 31 274 538 805 854 992 1126
Community Purpose 847 842 842 853 871 897 1081
Total Non-Res EP per SA2 1310 1556 1906 2221 2338 2718 3593
Clear Island Waters Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 76 77 79 79 79 347 348
Industry 0 0 0 0 0 0 0
Community Purpose 89 91 98 101 101 101 101
Total Non-Res EP per SA2 165 168 177 180 180 448 449
Merrimac Tourist (non-residential) 0 5 18 24 24 24 1300
Commercial 65 66 67 67 68 68 95
Industry 0 0 0 0 0 0 0
Community Purpose 533 536 551 562 583 603 616
Total Non-Res EP per SA2 598 608 636 653 674 695 2011
Robina Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 2534 4255 5069 5817 6142 6533 14737
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Industry 166 197 269 321 395 542 855
Community Purpose 2270 1227 1228 1317 1343 1344 1537
Total Non-Res EP per SA2 4970 5678 6566 7455 7880 8419 17128
Varsity Lakes Tourist (non-residential) 0 0 0 0 0 0 2
Commercial 222 312 407 449 450 422 10530
Industry 174 243 296 236 221 237 541
Community Purpose 221 220 221 220 220 220 314
Total Non-Res EP per SA2 617 775 925 906 891 880 11387
Ashmore Tourist (non-residential) 0 0 1 2 2 2 6
Commercial 609 657 714 730 733 735 1959
Industry 719 752 856 859 860 908 1013
Community Purpose 599 593 610 615 615 615 678
Total Non-Res EP per SA2 1927 2003 2181 2206 2209 2259 3656
Molendinar Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 399 299 364 402 402 403 830
Industry 1864 2145 2369 2405 2414 2572 6464
Community Purpose 208 212 587 938 1180 1271 2471
Total Non-Res EP per SA2 2470 2656 3321 3744 3996 4246 9765
Runaway Bay Tourist (non-residential) 0 0 0 0 0 0 0
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Commercial 553 553 554 554 554 554 3119
Industry 187 187 187 187 187 187 187
Community Purpose 153 154 172 173 173 173 238
Total Non-Res EP per SA2 893 894 912 913 913 913 3544
Guanaba - Springbrook Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 0 0 0 0 0 0 0
Industry 0 0 0 0 0 0 0
Community Purpose 0 0 0 0 0 0 0
Total Non-Res EP per SA2 0 0 0 0 0 0 0
Currumbin Valley - Tallebudgera
Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 74 74 111 125 128 126 121
Industry 237 237 237 237 237 237 237
Community Purpose 239 236 237 238 238 238 239
Total Non-Res EP per SA2 550 548 585 599 603 601 597
Mudgeeraba - Bonogin Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 431 452 482 489 496 518 863
Industry 14 11 11 11 11 11 11
Community Purpose 429 485 827 958 1042 1116 1465
Total Non-Res EP per SA2 874 948 1320 1458 1549 1645 2339
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Reedy Creek - Andrews Tourist (non-residential) 0 4 6 7 7 7 8
Commercial 23 38 38 39 39 40 49
Industry 2 3 3 3 3 3 3
Community Purpose 294 281 281 281 281 281 281
Total Non-Res EP per SA2 319 325 328 329 330 331 341
Carrara Tourist (non-residential) 538 546 549 549 549 549 562
Commercial 467 570 676 730 740 740 1518
Industry 778 801 856 887 895 905 1642
Community Purpose 1267 1265 8068 8071 8073 8074 8324
Total Non-Res EP per SA2 3050 3183 10148 10236 10256 10267 12047
Highland Park Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 222 333 363 393 359 359 769
Industry 88 0 0 0 0 0 0
Community Purpose 121 121 130 137 140 140 162
Total Non-Res EP per SA2 431 454 493 529 500 500 931
Nerang - Mount Nathan Tourist (non-residential) 130 133 142 146 146 124 2
Commercial 975 987 1013 1026 1028 1348 4887
Industry 2421 2705 2752 2844 2848 2845 3733
Community Purpose 1199 1188 1195 1208 1215 1219 1882
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Total Non-Res EP per SA2 4724 5012 5101 5223 5237 5536 10503
Pacific Pines - Gaven Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 140 181 410 521 571 577 1055
Industry 32 96 101 106 110 114 156
Community Purpose 197 230 402 461 487 502 707
Total Non-Res EP per SA2 369 507 914 1088 1168 1193 1918
Worongary - Tallai Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 147 152 214 290 325 325 325
Industry 0 0 0 0 0 0 0
Community Purpose 94 126 177 189 189 189 189
Total Non-Res EP per SA2 241 279 391 479 514 514 514
Coomera Tourist (non-residential) 1225 1257 1305 1347 1351 1548 8500
Commercial 127 142 319 734 1355 473 2372
Industry 456 654 1480 2166 2574 2942 4352
Community Purpose 272 336 487 748 802 826 2459
Total Non-Res EP per SA2 2080 2389 3591 4996 6081 5788 17683
Helensvale Tourist (non-residential) 50 50 56 42 42 42 41
Commercial 1307 1549 1926 2318 2641 2379 7714
Industry 369 335 628 749 763 802 1015
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Community Purpose 354 508 796 985 1055 1130 1356
Total Non-Res EP per SA2 2080 2442 3405 4094 4502 4353 10126
Hope Island Tourist (non-residential) 893 893 893 893 893 893 1168
Commercial 847 922 1104 1186 1184 1223 24023
Industry 22 22 22 22 22 22 171
Community Purpose 169 169 169 169 169 169 177
Total Non-Res EP per SA2 1930 2006 2188 2269 2268 2306 25538
Jacobs Well - Alberton Tourist (non-residential) 1 1 1 1 1 3 4
Commercial 20 44 174 339 513 699 2878
Industry 27 125 209 317 396 475 2323
Community Purpose 32 32 32 33 33 34 36
Total Non-Res EP per SA2 80 202 417 690 944 1211 5240
Ormeau - Yatala Tourist (non-residential) 181 181 181 181 181 181 186
Commercial 791 515 538 564 594 1337 2270
Industry 13641 15461 18423 21276 23845 27162 61663
Community Purpose 600 588 814 1059 1233 1276 2133
Total Non-Res EP per SA2 15212 16746 19955 23080 25853 29955 66252
Southport Tourist (non-residential) 193 194 197 198 198 469 487
Commercial 7369 8335 9897 10275 10318 10426 17699
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Industry 1756 1855 2019 2052 2207 2294 3646
Community Purpose 5006 5250 7768 7821 8548 8600 9716
Total Non-Res EP per SA2 14325 15635 19880 20346 21271 21789 31549
Benowa Tourist (non-residential) 1391 1391 1391 1391 1391 1391 1391
Commercial 168 179 200 207 207 207 207
Industry 0 0 0 0 0 0 0
Community Purpose 925 925 927 927 927 927 947
Total Non-Res EP per SA2 2484 2495 2517 2525 2525 2525 2545
Bundall Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 1363 1705 2072 2276 2371 2430 7389
Industry 730 703 703 703 703 703 1319
Community Purpose 331 183 312 400 424 442 736
Total Non-Res EP per SA2 2423 2591 3087 3378 3498 3575 9445
Main Beach Tourist (non-residential) 2671 2701 2727 2756 2756 2772 4427
Commercial 528 849 1253 1479 1588 1734 3326
Industry 92 38 38 38 38 38 38
Community Purpose 501 346 346 346 346 346 346
Total Non-Res EP per SA2 3792 3934 4365 4619 4729 4891 8137
Surfers Paradise Tourist (non-residential) 9089 9735 11313 11604 11277 9947 9436
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Projection area (SA2) Development type Existing and projected non-residential EP per planning horizon
2011 2016 2021 2026 2031 2036 2066
Commercial 65 143 186 193 196 185 241
Industry 168 168 168 168 168 168 168
Community Purpose 457 539 844 939 939 939 1024
Total Non-Res EP per SA2 9779 10584 12511 12904 12580 11239 10869
Inside priority infrastructure area (within IDM extent)
Tourist (non-residential) 22,933 25,075 28,965 29,866 29,172 28,205 45,022
Commercial 30,798 35,879 41,386 44,914 46,862 48,261 147,610
Industry 33,700 37,438 43,695 48,718 52,601 57,737 109,524
Community Purpose 24,654 24,278 36,207 39,009 41,324 42,533 55,889
Total Non-Res EP (inside PIA) 112,085 122,670 150,253 162,506 169,958 176,736 358,044
Outside priority infrastructure area (within IDM extent)
Tourist (non-residential) 0 0 0 0 0 0 0
Commercial 265 266 267 269 271 274 346
Industry 119 119 119 120 124 126 198
Community Purpose 1,230 1,582 2,338 2,682 2,853 3,019 3,270
Total Non-Res EP (outside PIA) 1,615 1,967 2,724 3,071 3,248 3,419 3,814
City of Gold Coast (within IDM extent)
Tourist (non-residential) 22,933 25,075 28,965 29,866 29,172 28,205 45,022
Commercial 31,063 36,146 41,653 45,183 47,133 48,535 147,955
Industry 33,819 37,557 43,814 48,837 52,725 57,863 109,722
Community Purpose 25,885 25,860 38,545 41,690 44,177 45,552 59,159
Total Non-Res EP 113,700 124,637 152,978 165,577 173,206 180,155 361,858
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Annexure 2: Indicative Trunk and Non-Trunk Infrastructure Specification for Water Supply and Sewerage Networks
Trunk infrastructure Non-trunk infrastructure
Water supply:
Land and/or works for:
Potable water distribution mains that serve a trunk function and have a size equal to or greater than DN200mm, or have a size less than DN200mm, but in the latter case only where providing a connecting function between other trunk infrastructure on either side of the mains
Valves and fire fighting hydrants located on trunk mains
Ground level reservoirs owned by CoGC
Elevated reservoirs owned by CoGC
Pump stations owned by CoGC
Pressure reducing valve, flow control valve and metering installations owned by CoGC
Rechlorination facilities owned by CoGC
Telemetry, monitoring, instrumentation and control systems owned by CoGC
Note: The City of Gold Coast does not own or operate potable water sources, treatment plants or bulk supply mains, with bulk potable water being supplied by SeqWater (state government entity).
Land and/or works for:
Water treatment facilities not owned by CoGC or the state government
Water mains having a diameter less than DN200mm, and where not providing a connecting function between other trunk infrastructure on either side of the mains.
Meters, valves and fire hydrants located on water mains having a diameter less than DN200mm, and where the mains do not providing a connecting function between other trunk infrastructure on either side of the mains.
Any infrastructure not serving a trunk function.
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Trunk infrastructure Non-trunk infrastructure
Sewerage:
Land and/or works for:
Sewage Treatment Plants owned by CoGC
Sewage Release Systems owned by CoGC
Sewage Storages owned by CoGC
Gravity sewers that serve a trunk function and have a size equal to or greater than DN225mm, or have a size less than DN225mm, but in the latter case only where providing a connecting function between other trunk infrastructure on either side of the gravity sewers
Rising mains that serve a trunk function and have a size equal to or greater than DN200mm, or have a size less than DN200mm, but in the latter case only where providing a connecting function between other trunk infrastructure on either side of the rising mains
Manholes on trunk gravity sewers
Sewage pump stations owned by the CoGC
Odour control and corrosion control systems owned by the CoGC
Telemetry, monitoring, instrumentation and control systems owned by the CoGC
Land and/or works for:
Sewage treatment plant systems not owned by COGC
Gravity sewers having a diameter less than DN225mm.
Rising mains having a diameter less than DN200mm.
Any infrastructure not serving a trunk function.
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Annexure 3: Schedules of Works for Augmentation of Trunk Water Supply Infrastructure
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Annexure 4: Schedules of Works for Augmentation of Trunk Sewerage Infrastructure
Sewerage Category 1 - Sewage Treatment Plants
2016 2021 2026 2031 2036 2066 TotalPimpama STP: 0Stage 2 Capacity Ugrade: 68,000EP 68,000,000 68,000,000Stage 3 Capacity Ugrade: 68,000EP 68,000,000 68,000,000Stage 4 Capacity Ugrade: 68,000EP 68,000,000 68,000,000Pimpama STP Totals 68,000,000 0 68,000,000 0 0 68,000,000 204,000,000
0Coombabah STP: 010ML Balance tank and odour control 10,000,000 10,000,000Stage 6 Capacity Upgrade: 70,000 EP (eastern side), plus Ancillary Work 74,000,000 74,000,000Stage 7 Capacity Upgrade: 70,000 EP (eastern side) 70,000,000 70,000,000Stage 8 Capacity Upgrade: 70,000EP (eastern side) 70,000,000 70,000,000Centralised Bisolids Facility Stage 2 30,000,000 30,000,000Stages 9 & 10 Capacity Upgrades: 140,000EP - western side 154,000,000 154,000,000Coombabah STP Totals 10,000,000 74,000,000 70,000,000 0 100,000,000 154,000,000 408,000,000
0Merrimac STP: 0Online upgrade: 24,500EP capacity 2,000,000 2,000,000Stage 6&7 Capacity Upgrade: 136,000EP 136,000,000 136,000,000Decomissioning Stages 1-3 7,000,000 7,000,000Stage 8 Capacity Upgrade: 68,0000EP 68,000,000 68,000,000Stage 9 Capacity Upgrade: 68,0000EP 68,000,000 68,000,000Merrimac STP Totals 0 2,000,000 143,000,000 0 68,000,000 68,000,000 281,000,000
0Elanora STP:Stage 2: Biosolids upgrade (thickening, sludge pumps & gas handling) 9,400,000Stage 3 Capacity Upgrade: 20,000EP, plus Increase in Nutrient Removal 36,000,000 36,000,000Elanora STP Totals 0 0 0 0 9,400,000 36,000,000 45,400,000
Planned STP augmentations CAPEX per horizon ($)
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Sewerage Category 1 - Long Term Release Infrastructure downstream of Coombabah and Merrimac STPs
Total 12,770,000 144,423,510 12,496,000 60,117,444 0 1,000,000 230,806,954
Elanora and Merrimac $0 $18,022,848 $5,000,000 $0 $0 $0 $23,022,848
Pimpama, Coombabah and Stapylton $0 $20,321,645 $6,000,000 $45,712,885 $0 $1,000,000 $73,034,530All (not specific to North or South) $12,770,000 $106,079,017 $1,496,000 $14,404,559 $0 $0 $134,749,576
Elanora $1,565,020 $18,291,489 $1,436,096 $1,389,489 $0 $0 $14,560,492Merrimac $3,500,009 $40,974,929 $4,135,887 $4,127,512 $0 $0 $54,426,844Coombabah $6,073,817 $63,497,815 $5,074,307 $40,459,238 $0 $704,341 $113,976,130Pimpama $1,032,590 $14,910,279 $1,316,855 $9,907,298 $0 $192,330 $31,122,827Stapylton $598,564 $6,748,999 $532,856 $4,233,907 $0 $103,329 $16,720,660TOTAL $12,770,000 $144,423,510 $12,496,000 $60,117,444 $0 $1,000,000 $230,806,954
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Sewerage Category 1 - Pimpama to Coombabah Effluent Release Main
2016 2021 2026 2031 2036 2066 TotalStage 1: capacity augmentation up to 10ML/d 1,300,000 1,300,000Stage 2: capacity augmentation up to 30ML/d 16,500,000 16,500,000Stage 3: capacity augmentation up to 41ML/d 6,400,000 6,400,000Stage 4: capacity augmentation up to 54ML/d 0 3,800,000 3,800,000
1,300,000 16,500,000 6,400,000 0 0 3,800,000 28,000,000
2016 2021 2026 2031 2036 2066 TotalStapylton $477,044.67 $5,141,375 $1,843,681 $0 $0 $1,328,049 $8,790,151Pimpama $822,955.33 $11,358,625 $4,556,319 $0 $0 $2,471,951 $19,209,849Coombabah $0 $0 $0 $0 $0 $0 $0Merrimac $0 $0 $0 $0 $0 $0 $0Elanora $0 $0 $0 $0 $0 $0 $0TOTAL $1,300,000 $16,500,000 $6,400,000 $0 $0 $3,800,000 $28,000,000
Planned augmentations CAPEX per horizon ($) - from unit rate estimate based on length and diameter
Catchments CAPEX per horizon ($) - from unit rate estimate, allocated to catchments
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Sewerage Category 2 Infrastructure:
• Stapylton Sewerage Catchment
• Pimpama Sewerage Catchment
• Helensvale Sewerage District
• Coombabah Sewerage District
• Merrimac East Sewerage District
• Merrimac West Sewerage District
• Elanora Sewerage Catchment
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Pimpama Sewerage Catchment: Schedule of augmentations of gravity sewers
Pimpama
Reference ID Trunk infrastructure description Planning horizon (year)
Nominal diameter
(mm)
Length (m)
Average depth (m)
Establishment Cost Estimate
($ 2013)
XGMA50 225 mm gravity sewer - BEATTIE ROAD, COOMERA 2016 225 163 5.5 $680,875
XGMA51 225 mm gravity sewer - CREEK STREET, PIMPAMA 2016 225 139 1.5 $67,446
XGMA52 300 mm gravity sewer - PIMPAMA JACOBS WELL ROAD, PIMPAMA 2016 300 1003 2.6 $538,053
XGMA53 750 mm gravity sewer - FOXWELL ROAD, COOMERA 2016 750 1783 4.9 $5,670,171
XGMA54 450 mm gravity sewer - CHROME DRIVE, PIMPAMA 2016 450 1379 <1.5 $1,242,201
XGMA01 375 mm gravity sewer - OLD PACIFIC HIGHWAY, PIMPAMA 2021 375 318 5.0 $874,264
XGMA58 300 mm gravity sewer - FOXWELL ROAD, COOMERA 2021 300 826 2.0 $916,513
XGMA02 375 mm gravity sewer - CHRISTINE DRIVE, COOMERA 2026 375 562 3.3 $716,989
XGMA57 225 mm gravity sewer - BEATTIE ROAD, COOMERA 2031 225 41 >6 $344,240
XGMA03 450 mm gravity sewer - GEORGE ALEXANDER WAY, COOMERA 2036 450 1010 <1.5 $1,108,104
XGMA04 150 mm gravity sewer - RIVERMEADOWS DRIVE, UPPER COOMERA 2066 150 133 4.4 $126,256
XGMA05 150 mm gravity sewer - DAYS ROAD, UPPER COOMERA 2066 150 193 1.7 $90,495
XGMA55 225 mm gravity sewer - OAKEY CREEK ROAD, COOMERA 2066 225 42 2.4 $34,590
XGMA56 225 mm gravity sewer - CABBAGE TREE POINT ROAD, STEIGLITZ 2066 225 19 2.5 $42,079
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Council of the City of Gold Coast PO Box 5042 GCMC Qld 9729 P 1300 GOLDCOAST E [email protected] W cityofgoldcoast.com.au