Developers' Manual Version 1.35
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Developers’ Manual Version 1.35
Developers Manual
Revisions
The following clauses in this manual were revised on the dates shown.
Revision Issue Date Reason for Change
Number
1.0 4 August 1999 Initial Issue
1.1 6 April 2000 Amendments to clauses 2.1, 2.3.2, 4.1, 5.1, 18.1, 19.1.3, 19.1.5,
22.2, 23.1.2, 23.1.4, 26.1.1, 26.1.4, 26.2.1 and 27.1
Clauses 4.2 and 27.1.1 deleted
New sections 28 and 29 added
Modifications to table of contents, maps, glossary of terms and minor
editorial changes
1.2 16 January 2001 Amendments to clauses 2.1, 2.2, 2.3.2, 2.3.3, 9.4.2, 9.4.3, 18.1.1,
18.1.2, 19.1.5, 22.1.2, 22.1.3 (deleted), 24.3.6, 25.1.3 (added),
25.2.5, 25.2.6, 25.3, 26.1.1, 26.1.2, 27.1.1 and 29
Modifications to table of contents, glossary of terms and minor
editorial changes
1.3 10 September 2001 Amendments to clauses 2.1, 2.2, 10.1.3, 19.1.5, 24.1.1, 24.3.7
(added)
Modification to table of contents
1.4 May 2002 Amendments to clauses 2.1,18.1.1, 19.1.5, 24.3.1, 24.3.6, 29.3
(added)
Section 18 renamed and Section 10.1 clarified
Modifications to table of contents and glossary of terms
1.5 September 2003 Amendments to Clauses:-
2.3 numbered in body of document,
9.4.3 Category g) added; drawing guidelines changed to” WCX CAD
Standard (formerly WCX Pack)”,
2.2 Wastewater Manual Volume 2 replaced with “Design Standard
Number 51” and “for drawing standards WCX CAD Standard (formerly
WCX Pack)” added, and “Vacuum Sewerage Manual” added.
6. amended.
10.1.12 Vacuum Sewerage added.
25.2.6 inserted and existing 25.2.6 & 25.2.7 re numbered,
22.6.2 amended and 22.6.2.1, 22.6.2.2 and 22.6.2.3 added.
“Design Standards” added to Glossary of Terms and in general text
throughout manual as required.
Modifications to table of contents
1.6 January 2006 Contact details in Clauses 5.1 5.2 & 5.3 amended
Clause 2.2 – list of manuals amended to include External Approvals
Manual
Clause 8 Title changed to External Approvals – modifications to text
to accommodate External Approvals Manual and new location of
Prelims to Works
Clause 10 – Initial Submission. General amendments to replace
covering letter with Submission cover sheet included at Clause 10.1
Clause 12 – Final Submission. General amendments to replace
covering letter with Submission cover sheet included at Clause 14.1
1.7 July 2006 Requirement for Serviceable Lots list added at clause 10.1.7 – other
clauses renumbered to suit and Submission Cover Sheet for Review of
1.8 May 2007 Initial Engineering Design Submissions amended
Amendment to clauses
Clause 2.3.3 Added “The Construction Engineer is responsible for
arranging the construction of the works to meet the requirements of
the relevant manuals, codes and standards”.
Section 11 Numbering reformatted on Submission Cover Sheet
1.9 February 2008 External Approvals
Paragraph to added outlining requirement to obtain comment from
2 Developers’ Manual
Developers Manual
Revision Issue Date Reason for Change
Number
external agencies regarding developments adjacent to or crossing a
road reserve or asset under control of an external agency.
1.10 February 2008 Modifications to table of contents
Clause 9.6 Deleted “from the Design Coordination by fax request on
9420 2203” and replaced it with “by completing the Application Form
at
Attachment 3 and forwarding it to your Submission Contact.”
Added Attachment 3 ‘”Application for single use of Water Corporation
example drawings for pumping station facility in electronic format”.
1.11 April 2008 Submission Cover Sheet for Acceptance of Final Engineering
Submissions paragraph 5 external approvals amended to ensure that
the required actions are completed
1.12 May 2008 Clause 2.3.4 Paragraph to serve notice that the Corporation has the
right to accept or reject nominated engineers.
1.13 September 2008 Clause 10.1.13 paragraph amended following request from Principal
Engineer Infrastructure Design Branch
Clause 10.1.14 Paragraph titled “Low Pressure Sewerage” and
amended to explain in what circumstances Grinder Pumps are
permitted.
1.14 October 2008 Clause 6 of the Submission Cover Sheet for Review of Initial
Engineering Design Submission redrafted to indicate if adjacent lots
are likely to become serviceable as a result of the works.
Clause 6 of the Submission Cover Sheet for Acceptance of Final
Engineering Submission redrafted to indicate property details of lots
of lots rateable as a result of the works
1.15 February 2009 Paragraph 5.3 As Constructed Contact details amended
Clause 15.2 re drafted to outline the requirement relating to the Final
Design Submission for Urban Drainage works.
March 2009 Contact details for Kalgoorlie para 5.2 amended also 5.3 amended to
ensure all “as constructed” details are forwarded to the Spatial
Information Management Group
1.16 April 2009 Submission Cover Sheet for Acceptance of Final Engineering
Submissions paragraph 5 External Approvals amended to ensure that
all requirements relating to the External Works Manual and the
Utilities Code of Practice are met.
1.17 August 2009 Clauses 10.1, 11,22.5, 24, 24.5.3 and 26 aligned to similar provision
in the Advanced Works Agreement Manual .
Additional checklist examples added clause 11.2 also Attachment 4
(i.e. example of a Wastewater As Constructed plan)
1.18 September 2009 Amended the Wastewater Reticulation and Water Reticulation Initial
Design Checklists Paragraphs 10.4.4 and 11.4 deleted
Paragraph 24.5.2 relating to as constructed information for Water
Reticulation works revised
October 2009 Clause 22.7 Joint Final Inspection changed to Final Takeover
Inspection
Clause 24.5.3 Amended to attachment 4
Clause 24.5.4 Typographical error amended
Clause 24.5.5 amended to reflect details contained in 24.5.2
1.19 December 2009 Clause 5.1 Main Extension contact details amended
Appendix 4 Example Wastewater Reticulation As Constructed Plan
reformatted as A3
1.20 January 2010 Clauses 10.1, 11.3, 11.4 & 11.5 changed to incorporate requirements
of Urban Main Drainage Manual.
1.21 July 2010 Section 3 Process Flowchart Prerequisites to Works amended to
External Approvals and Prerequisites to Works
Section 5 Perth Contacts amended to include Main Relocations
Section 11 amended to include Design Standard Variation Request
3 Developers’ Manual
Developers Manual
Revision Issue Date Reason for Change
Number
criteria
Section 13 Manager Land Development amended to Manager
Development Services Branch
1.22 October 2010 Section 11.2 Submission cover sheet for review of initial engineering
design amended
Section11.3 Water and wastewater reticulation initial design
checklists amended
1.23 March 2011 Section 24 Incomplete submissions will not be accepted or captured
until requested information is received.
1.24 June 2011 Section 5 Corporation Contacts
Section 5.2 Inspection Contacts
Section 5.3 As- Constructed Information
Amended following
Contacts
country re alignment
Section 5.4 State Map
Section 5.5 South West Region Map
Section 5.6 Metropolitan Map
1.25 December 2011 Point 10.1.7 deleted from Initial Submission Requirements
Section 28 Added reference to Section5 of the Working Near Water
Corporation Pipeline Guidelines
1.26 January 2012 Section 5.2 Amended contact numbers for the Southwest Region
Added Plan Number field to the Submission Cover Sheet for Acceptance
of Final Engineering Submissions.
Section 24 Added Water and Wastewater Reticulation As-Constructed
Submission Checklist
Section 28 Attachment 1 amended to include open drains
1.27 March 2012 Submission Cover Sheet for acceptance of final engineering
submissions – section headings numbered
Clause 24.1 Recording of as constructed information amended to
include Licensed Surveyors or Engineering Surveyors
1.28 May 2012 Section 5.1 Amended submission contact details
Section 5.2 Amended North West Region telephone / Fax numbers
1.29 February 2013 Section 2.2 Amended reference to Design Standards
Section 4.1.2 Revised paragraph 2_Connection to Existing Works
Section 5.3 As Constructed Information Contact details amended
Section 11 Added Water and Wastewater Headworks Initial design
checklists
1.30 July 2013 Amended the maps in Sections 5.4, 5.5 and 5.6
Section 11.1 amended to make reference to the Design Standard
variation Request Form and Inserted new form (page 27)
1.31 December 2013 Section 8 Amended legislative requirement to provisions of the Water
Services Act 2012
Section 9.4 Change phone contact to email inbox address
Section 9.5 Amended fax number
Section 11 Added Drainage Works Initial Design Check list
Section 20.3 Added Construction of assets without all relevant approval
requirements
1.32 April 2014 Amended Initial submission coversheet, Water and Wastewater retic
and Drainage works check lists
1.33 August 2014 South West Region map removed
Initial Submission Cover sheet removed
Headworks assets removed as scope of works
Process diagram revised
Application/Submission forms located at rear as appendices
Additional Pre-calculated information included
1.34 December 2014 Section 10.2 Site plan information to be included with digital copy of
design drawings
4 Developers’ ManualDevelopers Manual
Revision Issue Date Reason for Change
Number
Section 15.4 amended to include requirement where drawing
amended and cost of project increases a revised Final Subdivision
Cover Sheet must be included
Section 23 revised sub paragraphs 23.1.3 and 23.1.5 removed
Appendix 5 Final submission Cover Sheet added additional dot point
under Important information for Design Engineers
1.35 May 2015 Section 14 Additional information required i.e. Name of Construction
Engineer, Contractor , Sub contractor
Section 17 redrafted - Constructed Phase – Start-up
Section 18 redrafted.-. Construction Phase - Design amendment –
alterations to an accepted final submission
July 2015 Country Inspection Contacts amended
5 Developers’ ManualDevelopers Manual
Feedback Form
To provide feedback on the Developers’ Manual, please complete this form.
Publication Information Revision Status:
Title: Developers’ Manual
Your Information Address:
Name: Fax:
Phone:
Proposed Change Information
Page No.:
Section:
Para Reference (e.g. 1.2.3):
Description of change:
Reason for change:
Do you require a response to your suggestion/request? Yes No
Your signature: Date:
Please return completed form to:
Development Services Branch
Water Corporation
PO Box 100
LEEDERVILLE WA 6902
Fax: 9420 3193
6 Developers’ ManualDevelopers Manual
CONTENTS
1 Glossary of Terms 10
2 Introduction 12
3 Fees 13
4 Corporation Contacts 14
5 Process 18
6 Planning Phase - Preliminary Investigation 19
7 Planning Phase – Land Requirements 19
8 Planning Phase – External Approvals 19
9 Design Phase – Design of Works 20
10 Design Phase – Initial Submission 20
11 Design Phase – Design Standard Variation Requests 21
12 Design Phase – Review of the Initial Design 22
13 Design Phase – Objections to the Corporation’s requirements 22
14 Design Phase – Final Submission 22
15 Design Phase – Acceptance of the Final Submission 23
16 Design Phase – Alterations to an accepted Final Submission 23
17 Construction Phase – Start-up 23
18 Construction Phase - Design Amendment (Alteration to an accepted final 24
submission)
19 Construction Phase – Construction Requirements 25
20 Construction Phase – Isolation of New Works (Wastewater only) 25
21 Construction Phase – Inspection of Works during construction 26
22 Construction Phase – Connecting to existing assets 28
23 Takeover Phase – As-constructed Drawings 28
24 Takeover Phase – Takeover of the Works 29
25 Takeover Phase – Warranty Period 29
26 Takeover Phase – Final Acceptance Certificate 30
7 Developers’ ManualDevelopers Manual
Appendices
27 Appendix 1: Water Initial Design Checklist 31
28 Appendix 2: Wastewater Initial Design Checklist 32
29 Appendix 3: Drainage Submission Checklist 33
30 Appendix 4: Request for Variation to Design Standard 34
31 Appendix 5: Final Submission Cover Sheet 35
32 Appendix 6: Clearance to Works Guidelines 36
33 Appendix 7: Pre-handover Checklist 37
34 Appendix 8: As-Constructed Plan Checklist 38
35 Appendix 9: Example Wastewater As-Constructed Plan 39
8 Developers’ ManualDevelopers Manual Foreword The Developers’ Manual is an initiative by the Water Corporation in response to feedback from the development industry for greater standardisation of requirements for water, wastewater and urban drainage assets. The manual is made up of topics extracted from the technical manuals that deal with administrative rather than technical requirements. In bringing these requirements together considerable effort has been made to standardise, clarify and simplify them. The terminology of the manual reflects the reality that the only agreement the Corporation has is with the developer, not with any construction engineer or contractor. Please use the feedback form on page 3 if you have other ideas for improvements. Any feedback is welcome and all suggestions for improvement will be carefully reviewed and acknowledged. This manual refers to the Corporation’s technical manuals and design standards for technical information relating to water, wastewater and drainage works. These manuals will be updated in the future to remove information that is in this new manual and bring them in line with it where necessary. Should material in a technical manual or design standard conflict with information in this manual, this manual takes precedence. This manual does not apply to works required to serve large developments. For this type of development please refer to the Multi-Staged Development Works Manual. 9 Developers’ Manual
Developers Manual
1 Glossary of Terms
In this Manual the following words and expressions shall have the following meanings. These
meanings do not necessarily comply with the meanings given in the Water Corporation Act and
other Water Corporation publications.
Agreement The formal legal document between the developer and the
Corporation with respect to delivering fit for purpose assets that
are acceptable to the Corporation.
Alignment The line on which the pipes are laid and measured from the
adjacent cadastral boundary.
As-constructed The document on which details of the constructed works are
Document recorded and submitted to the Corporation.
Asset Inspector An officer of the Corporation responsible for assessing and or
inspecting the works.
Beneficiary Lot Lots that acquire water supply or wastewater service availability,
as a result of an extension of the reticulation, without the owner
having paid, or been deemed to have paid, Headworks
Contributions.
Clearance to Work A permitting procedure to authorise a contractor to conduct work
Permit on, or near a designated asset, other than where the personnel
carrying out the work are being directly supervised by a person
who has operational control of the asset.
Construction The engineer or engineering firm appointed by the developer to
Engineer manage the construction of the works.
Contract The agreement between the developer and the contractor for the
execution of the works.
Contractor A person or organisation bound to execute the works under a
contract.
Contract Price The amount payable to the contractor for the execution of a
contract.
Corporation The body corporate known as the Water Corporation, Western
Australia.
Design Drawings The drawings prepared by the design engineer, showing the
proposed works.
Design Engineer The engineer or engineering firm appointed by a developer to
prepare design drawings and documents for submission to the
Corporation.
Design Standard The Corporation’s design standard relevant to the works being
undertaken.
Developer The person or organisation that has made an agreement with the
Corporation to provide drainage, water or wastewater
infrastructure.
Distribution Main A water supply pipeline to which standard services are not normally
connected.
10 Developers’ ManualDevelopers Manual
Easement A defined area of land over which the Corporation has a right to
enter for purposes defined by agreement or statute and subject to
any conditions/restrictions implied therein. Such purposes can
include for example, access, construction, maintenance and repair.
Engineer A person qualified to be a chartered professional engineer, and who
has appropriate engineering experience.
Final Acceptance A certificate issued by the Corporation at the end of the warranty
Certificate period provided conditions have been met.
Final Inspection A letter issued by the asset inspector confirming that the Works are
Clearance acceptable.
Final Inspection The inspection by the asset inspector, with the construction engineer in
attendance, to assess acceptance of the assets.
Headworks The infrastructure that provides water, wastewater and drainage
services, excluding reticulation and private plumbing e.g. dams,
wastewater treatment plants, main drains, etc.
Inspection Any activity undertaken to assess the condition of the works.
Land Development The formal legal document between the developer and Corporation
Agreement with respect to fulfilling any WAPC conditions imposed on a
subdivision application.
Main Drain An existing or proposed drain within the metropolitan area that is
controlled by the Corporation.
Main Sewer A wastewater collection sewer to which connections are not
normally made.
Precalculated A surveyor’s precalculated cadastral plan of the proposed
Cadastral Plan subdivision development.
Prerequisites To The procedure necessary to address the Corporation’s statutory
Works requirements under the Water Services Act 2012 for general and
major works as set out in the External Approvals Manual.
Pre-handover The inspection conducted by the construction engineer prior to booking a
inspection final inspection.
Region An area of the state designated as a region of the Corporation.
Regional Office The principal office of that region.
Reticulation The pipelines that connect private works to major works, and are
constructed to provide a water supply or wastewater service to a
property.
Shall A mandatory requirement.
Should A requirement to be adopted unless circumstances justify a
variation.
Specification The document containing the technical clauses to be read in
conjunction with the design drawings for the works.
Standard Drawings Registered Corporation drawings.
Takeover When the Corporation assumes ownership of the works and the
warranty commences.
Technical Manual The Corporation’s technical manual relevant to the works being
undertaken.
Warranty Period The period commencing from takeover.
11 Developers’ ManualDevelopers Manual
2 Introduction
2.1 Scope
This manual explains the administrative requirements for the provision of works that are covered
by an agreement, so they can be incorporated into the Corporation’s schemes and taken over by
the Corporation. It covers all aspects from the preliminary investigation stage to final acceptance of
the works by the Corporation. Works consist of the following categories:
a) Water and wastewater reticulation involving land subdivision
b) Water and wastewater reticulation extensions not involving land subdivision
c) Relocating existing headworks assets to facilitate land development*
d) Urban main drainage works*
Works covered by a MSWA are not included in the scope of this Manual.
* Any works performed on headworks assets (category c & d) will be assessed to determine the
scope of works and level of risk to the asset. Works that are deemed significant may be required to
follow additional procedures that are not contained in this manual. Prior to lodging a submission,
you should contact us on 9420 2099 or email land.servicing@watercorporation.com.au to discuss
your options.
2.2 Technical and Other Manuals
The Corporation has design standards and manuals that outline how each type of asset should be
constructed. These are shown in the below table.
Asset Type/Process Design Standard or Manual
Water reticulation Design Standard 63
Wastewater mains Design Standard 50 and the Water Services
Association of Australia Sewerage Code.
Vacuum Sewerage Design Standard 53
Water distribution mains Design Standard 60
Urban main drainage Design Standard 66
Drawing Standards Design Standard 80
Prerequisites to Works External Approvals Manual
To protect pipelines from AC interference Earth Potential Rise Manual
To enquire about our design standards please email:
idb.standardsenquiries@watercorporation.com.au
Where this manual conflicts with another manual or standard, this manual takes precedence.
2.3 Roles and Responsibilities
2.3.1 Developer
The developer is the proponent of the works. The developer is responsible for:
Carrying out the requirements of this manual for the provision of the works,
Appointing a design engineer, a construction engineer and a contractor to carry out
the works in accordance with this manual, the technical manuals and design
standards.
2.3.1 Design Engineer
The design engineer is responsible for designing the works required to service land.
The design engineer must be a registered holder of all of the Corporation’s manuals and
design standards.
12 Developers’ ManualDevelopers Manual
2.3.2 Construction Engineer
The construction engineer is responsible for managing and arranging the construction of the
works in accordance with relevant manuals, codes and design standards, and to ensure the
works are acceptable to the Corporation.
2.4 Notification
The Developer should inform the Corporation in writing of the details of all the parties engaged to
deliver the works. The Corporation reserves the right to accept or reject nominations based on its
assessment of the capability, capacity and past performance of the nominated party.
3 Fees
The following fees are payable by the developer to the Corporation. Fees will remain valid for the
life of the submission.
3.1 Water Reticulation Planning
Fee – is a payment for water supply reticulation planning which is based on 3.75 per cent of the
Corporation’s estimate of the construction of the cost of the works.
3.2 Connecting to existing works
Fee – is a payment for the Corporation to connect new works to existing live works. This fee is
dependent on the type and size of connection and is required to be paid prior to the connection
being performed. Refer to 3.3, 3.4 and 3.5 for further information.
3.3 Potable and Non-potable Water Reticulation Connections
3.3.1 Metropolitan Perth Region
Standard connection fees may be provided as part of an agreement. Where the works
contain non-standard or complex connections, the land servicing consultant may direct the
design/construction engineer to obtain a quote from ‘Reimbursements’, Perth region, prior
to the start-up meeting.
3.3.2 Non-metropolitan Regions
As part of the works design, the land servicing consultant may give direction to the
design/construction engineer as to how the connections may be arranged. Connection
requirements shall be discussed at the start-up meeting with the asset inspector. The fees
and actions involved in connecting works in non-metropolitan regions may vary depending
on the location and circumstances.
3.4 Wastewater Reticulation Connections
3.4.1 Metropolitan Perth Region
All connection fees shall be paid prior to the connection. The design/construction engineer
shall obtain a quote from ‘Reimbursements’. The isolation and connection requirements
shall be discussed with the asset inspector at the start-up meeting.
3.4.2 Non-metropolitan Regions
As part of the works design, the land servicing consultant may give direction to the
design/construction engineer as to how the connections may be arranged. Connection
requirements shall be discussed at the start-up meeting with the asset inspector. The fees
and actions involved in connecting works in non-metropolitan regions may vary depending
on the location and circumstances.
13 Developers’ ManualDevelopers Manual
3.5 Headworks Connections
When connecting to headworks infrastructure there is the potential for negative impact on many of
the Corporation’s end customers. Options such as tankering and limited shutdown periods must be
considered as part of the works design to minimise any disruption. The design engineer shall
discuss these requirements with the land servicing consultant in the early stages of the design to
determine any specific requirements.
4 Corporation Contacts
The Corporation contacts are shown below:
4.1 Submissions Contact
State-wide - Manager Land Servicing Phone: 9420 2099
Subdivision Development Services Branch Fax: 9420 3193
Works Water Corporation
John Tonkin Water Centre
629 Newcastle Street, Leederville
PO Box 100 LEEDERVILLE WA 6902
4.2 Inspections Contact
Metropolitan Inspection Services Phone: 9424 8462
Perth Region Perth Region Fax: 9424 8535
273 Bannister Road , Canning Vale
PO Box 1525
CANNING VALE Delivery Centre 6970
Agricultural Regional Works Inspector Phone: 9622 4814
Region Agricultural Region Fax: 9622 4866
Water Corporation
263 Fitzgerald Street
PO Box 265
Northam, WA, 6401
Great Regional Works Inspector Phone: 9791 0495
Southern Great Southern Region Fax: 9842 4255
Region Water Corporation
215 Lower Stirling Terrace
Albany, WA, 6331
Mid-West Regional Works Inspector Phone: 9923 4906
Region Mid-West Region Fax:: 9923 4966
Water Corporation
SGIO Building, Cathedral Avenue
PO Box 43
Geraldton, WA, 6531
North-West Regional Works Inspector Phone: 9186 8237
Region North-West Region Fax: 9186 8210
Water Corporation
Welcome Road
PO Box 84
Karratha, WA, 6714
14 Developers’ ManualDevelopers Manual
South-West Regional Works Inspector Phone: 9797 0495
Region South-West Region OR 9791 0464
Water Corporation Fax: 9622 4866
PO Box 305
Bunbury, WA, 6231
4.3 As-constructed Contact
All water and wastewater as-constructed drawings are to be submitted to:
spatial.datacapture@watercorporation.com.au
15 Developers’ ManualDevelopers Manual 4.4 State Map 16 Developers’ Manual
Developers Manual 4.5 Metropolitan Perth Region 17 Developers’ Manual
Developers Manual 5 Process 18 Developers’ Manual
Developers Manual
6 Planning Phase - Preliminary investigation
To ensure that the concept and capacity of the proposed works are compatible with the
Corporation’s overall planning requirements; the design engineer shall discuss the broad planning
concepts of the design with a land servicing consultant. If a vacuum sewerage system is required
or another alternative servicing arrangement is proposed, its planning must be acceptable to the
Corporation. The requirements shall be discussed at an early stage in the planning of the works.
Any requirements that will be imposed by other authorities on the operation of the works must be
discussed and agreed to by the Corporation.
7 Planning Phase - Land requirements
7.1 All easements, reserves and land to be owned by the Corporation required for a
project shall be shown on the design drawings.
7.2 Where easements or reserves are required and are outside the developer’s land
holding: written in-principle agreement of the arrangements necessary to acquire the
easements or reserves from the registered landowner is required.
8 Planning Phase - External approvals
8.1 During the preliminary stages of designing any works, the design engineer shall take
into account the requirements of the Corporation’s External Approval Manual. This includes
the statutory ‘Prerequisites to Works’ notification requirements as per the Water Services Act
2012.
8.1.1 Particular attention and early liaison needs to take place where any works are
adjacent to, within or crossing a reserve or asset that is controlled by Main Roads (WA),
Public Transport Authority, Western Power or Telstra.
8.1.2 Prior to discussing proposed works with all affected parties, the design engineer
should consider alternative options that reduce impacting any parties. The Corporation
may provide comments on a design prior to formal or informal approvals being sought.
8.2 Prerequisites to Works
Works are classified in Part 6 of the Water Services Act 2012 as either major, general or exempt.
Reticulation works will be either general or exempt works depending on where they are located.
The design engineer is responsible for determining the class of works and completing all
prerequisites to works requirements in accordance with the Act. If the proposed works are classed
as general, all relevant documentation, E.G. notice plan/letters etc. shall be included in the initial
design submission.
8.3 Objections
The design engineer should make every reasonable effort to resolve any objections. Any objections
that cannot be resolved shall be referred to the land servicing consultant.
8.4 Completion required
Confirmation that all requirements of the prerequisites to works process is required before the
Corporation accepts final design drawings. This includes full resolution of all objections.
19 Developers’ ManualDevelopers Manual
9 Design Phase - Design of works
9.1 Design requirements
Design drawings for the reticulation works shall be submitted by a design engineer.
9.2 Drawing certification
Each drawing and document that is submitted shall be signed by the design engineer who has the
authority to act on the behalf of the design engineer making the submission.
9.3 Design Responsibilities
The design engineer is responsible for ensuring the design of the works complies with the
Corporation’s manuals and design standards. Acceptance by the Corporation of a submission shall not
relieve the design engineer of this responsibility or the responsibility for any discrepancies, errors or
omissions in the submission or for the adequacy of the design.
9.4 Drafting Standards
The drafting for all submissions shall be in accordance with Australian Standard 1100, Part 101.
Drawings shall be suitable for microfilming.
9.5 Pre-Calculated Cadastral Plan
A digital copy of the precalculated cadastral plan will expedite the incorporation of information into the
Corporation’s spatial database. The digital file shall be in MGA94 coordinates. The plan shall be clear
and legible and only include information that is relevant. Unnecessary information that should not be
included is typically:
Road kerb lines,
Trees,
Power/light poles,
Stormwater pipes and gullies,
Other utilities services e.g. electricity, gas, Telstra etc.
9.6 Standard Drawings
Example standard drawings are available in the design standards.
10 Design Phase - Initial Submission
10.1 The purpose of the initial submission is to enable the Corporation to:
Ensure that the planned works conform with the overall planning,
Provide administrative details that are required to be shown on the final design drawing;
and,
Ensure that the prerequisites to works process has begun, if required.
* An initial submission will not be accepted where the relevant documents are not supplied, or are
incomplete.
10.2 The initial submission shall contain:
The Initial Submission Design Checklist for the relevant asset type.
A digital copy (PDF) of the design drawings, including site plan information.
The prerequisites to works documentation if the works are classed as general.
A letter from the owner of any land other than the developer’s, agreeing in principle, to
granting any easements or reserves required for the works.
20 Developers’ ManualDevelopers Manual
A list of any existing lots that becomes serviceable as a result of the works. The list shall
show the property address, owners name and mailing address and a description of the
land use (e.g. residence, industrial etc.)
10.3 Drainage
In addition to the documents required in section 10.2, submissions for drainage works shall also
contain:
One copy of the local water management strategy for the area.
One copy of the urban water management plan for the area.
A letter that includes:
A reference to the Department of Water’s drainage strategy for the area.
A statement setting out the developer’s understanding of who is responsible for
funding of any proposed future connection of a catchment to any part of the drain
covered by this submission.
A letter from the appropriate waterway/wetland catchment management agency (e.g.
Swan River Trust) detailing its comments on the drainage proposal where appropriate.
One copy of a soils investigation report where an investigation is required.
One copy of the summary of the proposed pollutant removal processes and mechanisms
within the drainage system including sizing calculations, where appropriate.
Two copies of the technical specification. The technical specification shall consist of the
technical clauses covering the work, or a statement shall be included in the covering
letter confirming that the specification is the same as one previously submitted.
10.4 Vacuum Sewerage systems
In addition to the points contained in section 10.2, any vacuum sewerage system submissions will
also require:
A statement from a supplier of an approved vacuum valve, as listed in the DS 36
Product Atlas stating that the supplier has received the system design prepared by an
approved designer. The statement must guarantee the hydraulics of the system and
confirm that the guarantee is transferable to the benefit of the Corporation. The review
must be carried out by a suitably experienced engineer and the engineer must be
explicitly identified in the statement referred to above.
Current approved vacuum valves are:
Air vac (contact Watercon) and,
Flovac (contact Flovac Vacuum Sewerage Systems)
*The initial submission should be emailed to dsbdesign.submission@watercorporation.com.au
11 Design Phase - Design standard variation requests
11.1 The Corporation’s design standards are developed to ensure fit for purpose assets that
achieve their economic design life with minimal operating and maintenance costs are delivered.
11.2 Occasionally a design may not meet the requirements of the design standard or proposes
an alternative solution. Where this occurs, the design engineer shall complete the request for
design standard variation form (refer to Appendix 4) and include it with the initial submission
documents.
11.3 When proposing a variation, the design engineer shall include at a minimum, the
following:
Details of the reasons/circumstances for the variation.
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An assessment of the impacts and benefits for the Corporation and the developer.
Details of options considered to negate the variation.
11.4 The following reasons for a variation will not generally be accepted by the Corporation:
Inadequate site investigation that results in obstacles or constraints of a non-latent nature.
Seasonal impacts that will resolve themselves over time.
Where the design engineer’s assessment will cause a significant impact to the
Corporation’s fundamental objectives.
Where the request’s fundamental objective relates to financial benefit for the developer.
Where the request is lacking sufficient information to be able to assess.
12 Design Phase - Review of the Initial Submission
12.1 The submission will be checked for conformity with the Corporation’s overall planning
requirements. The submission will be:
Accepted - if the submission is acceptable to the Corporation, it will be stamped as
accepted, the Corporation reference numbers and one copy of the drawings will be
returned to the design engineer. The design engineer will then be in a position to
proceed with the final submission; or
Accepted with amendments – if the submission is acceptable to the Corporation with
minor amendments, it will be stamped as accepted conditional to the amendments
being made, or
Rejected – if the initial submission is not acceptable, the Corporation will reject the
submission and request that the design be reconsidered.
13 Design Phase - Objections to the Corporation’s requirements
Any objections to planning or design requirements by the Corporation shall be made in writing to
the land servicing consultant. The objection shall state the reasons and efforts made to resolve any
issues. Any unresolved objections between the design engineer and the land servicing consultant
shall be referred to the Manager, Development Services.
14 Design Phase - Final Submission
The Final Submission shall consist of:
The final submission cover sheet (refer appendix 5).
An agreement in writing that formalises the arrangements for the Corporation to acquire
any easements or reserves required as a result of the works.
Confirmation that the prerequisites to works process has been completed, including
resolving any objections.
Six (6) A1 hard copies of the design drawings which shall incorporate the comments and
details provided by the Corporation.
Two (2) A1 hard copies of the design data plan (for wastewater submissions only).
Where already known:
The name of the construction engineer and contact details
The name and contact details of the contractor and any sub-contractors.
The contract price for the works.
The proposed date of commencement of work.
Where contract details are not known at the time of submitting the final submission these details
are to be provided prior to booking a Start Up Meeting.
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*Final submissions that are related to a subdivision application cannot be accepted prior to the
application reaching conditional approval.
15 Design Phase - Acceptance of the Final Submission
15.1 The final design drawings will be signed by the Corporation to indicate that the
submission is acceptable and one copy will be returned to the design engineer.
15.2 The final submission is valid for 12 months from the date of acceptance. If construction
has not begun within this period, the submission will no longer be valid and a new submission
will be required.
15.3 Acceptance of the design does not relieve the design engineer of any responsibilities for
any discrepancies, errors, omissions or for the adequacy and conformance of the design with the
relevant manuals and design standards.
15.4 Amended drawings
When drawings are amended and resubmitted, they shall be distinguished from previous
submissions by a new revision identifier. A brief description and date of the amendment shall
be included in the title block. If the revised amendment alters the overall cost of the project,
a Final Subdivision Cover Sheet must be included with the revised plans.
16 Design Phase - Alterations to an Accepted Final Submission
16.1 Once a plan has been accepted and before construction has started, any alterations to
the design shall be discussed with the land servicing consultant who will determine whether a
revised submission is required.
17 Construction Phase – Start-up
17.1 Prior to the start of the works, the construction engineer shall arrange and attend a
‘start-up’ meeting with the asset inspector
17.2 Once the design engineer receives the Corporation’s acceptance of a final design and
contract details have been provided, if not provided with the final submission (see
clause 14), the construction engineer can book a Start Up Meeting by contacting the
relevant Inspections Contact (see clause 4.2).
17.3 The Corporation requires a minimum of 5 business days’ notice to arrange a Start Up
Meeting
17.4 The construction engineer shall ensure that a record of the meeting is made. This record
shall detail any key information and agreements reached.
17.5 The following matters shall be addressed at the ‘start-up’ meeting:
Indicative dates for the start and completion of construction of works.
Method of isolating the new works from the existing works during construction.
Inspection plan, detailing which parts of the works (including testing) the asset
inspector will inspect, when these inspections are proposed to take place and any
requirements necessary to facilitate these inspections.
Nomination of additional staff that will access the site of the proposed works to carry
out Inspections.
Contact and reporting arrangements including signing of site inspection reports.
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Arrangements for the protection of Water Corporation assets.
Arrangements for the connection of new work to existing infrastructure.
Milestone meetings at which joint attendance is required.
Arrangements for inspection and testing processes.
17.6 A copy of the meeting record shall be forwarded to the asset inspector within five days
of the ‘start-up’ meeting occurring.
17.7 Before construction begins the construction engineer shall ensure:
The inspector has authorised construction to start.
A Clearance to Works Permit has been obtained from the Corporation’s Customer
Service Delivery group, where necessary.
The contractor employs personnel that are capable and accredited to perform the
works. Refer to the relevant manual or design standard for details of the appropriate
accreditation required.
17.8 Notice of Proposed Works
Where property, other than that owned by the developer, will be affected by the proposed works,
the construction engineer shall ensure that written notice has been given to the occupiers of such
property at least 10 days prior to the start of works.
18 Construction Phase – Design Amendment (Alterations to an
accepted final submission)
18.1 Prior to the start of the works, the construction engineer shall arrange and attend a
‘start-up’ meeting with the asset inspector
18.2 If construction has started, any requests for minor realignments of pipes, alterations to
connections and relocation of access chambers and valves shall be discussed with the asset
inspector. The asset inspector will provide guidance on these matters or may refer complex
matters to be dealt with by the land servicing consultant
18.3 A copy of the meeting record shall be forwarded to the asset inspector within five days of
the ‘start-up’ meeting occurring.
19 Construction Phase – Construction Requirements
19.1 During construction the construction engineer shall liaise with the asset inspector for any
matters that arise. The construction engineer shall ensure:
If a change of contractor becomes necessary, the construction engineer notifies the
Corporation of the new contractor’s name and contact information.
Any requirements by the Corporation regarding the contractor’s work are directed to
the construction engineer and NOT to the contractor.
Work shall be carried out in accordance with the requirements of the relevant technical
manual or design standard, relevant acts and by-laws and this manual.
The construction engineer shall ensure that the contractor is aware of, and agrees to
comply with, the requirements of any authority in regard to the protection, diversion or
relaying of any service affected by the works.
The construction engineer shall ensure that the contractor is conversant with any
agreement with any authority such as the Department of Aboriginal Affairs or
Department for Planning and Infrastructure into which the design engineer, the
developer or the Corporation may have entered for the works.
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The construction engineer shall ensure that the contractor verifies by survey the
location and level of the point of connection of the works to the existing system.
19.2 Protection of Corporation Assets
19.2.1 Corporation assets shall not be disturbed without the approval of the appropriate
regional office on each and every occasion, OR excavation or construction work shall not be
performed in close proximity to any existing Corporation asset until:
A joint inspection of the asset has been performed by the Corporation and construction
engineer to ascertain the condition of the asset, and
The asset inspector has been given two working days’ notice of the intention to
commence working.
19.2.2 The construction engineer ensures adequate measures are taken to protect the
Corporation’s assets from damage during construction of the works
.
19.2.3 If any damage occurs to existing assets, the construction engineer shall immediately
notify the Corporation. The Corporation will assess the damage and advise what action is to
be taken. This may include the developer being charged the costs to repair any damage.
19.3 Construction of Assets without All relevant approvals
Where the Corporation becomes aware that construction has commenced and due process has not
been followed, the following actions will result:
19.3.1 The Corporation will instruct that works cease immediately. Should a cease work
instruction not be complied with the Corporation may decline to accept any further
involvement in the works.
19.3.2 A third party certified assessment of the works already constructed will need to be
provided, at the developers’ cost, for the Corporation’s review.
19.3.3 The Corporation reserves the rights to refuse and accept the choice of the third party
assessor.
19.3.4 Where the third party assessment identifies non-compliance with the relevant standard,
faults will need to be remedied where possible, or the works removed.
19.3.5 Only after points 18.3.1 – 18.3.4 have been resolved and the requirements of any
manual have been met, will works be able to recommence.
19.3.6 The Corporation will not offer the availability of early clearance of subdivision conditions
associated with these works.
19.3.7 The Corporation may at its discretion decline to accept the involvement of the
engineering consultant in future Corporation funded projects.
19.3.8 The warranty (defects liability) period for the works will be increased to two years.
20 Construction Phase – Isolation of new works (wastewater only)
20.1 The purpose of isolating non-commissioned sewers from live sewers is to provide a safe
working environment for construction, testing and inspection of the new work. Where the non-
commissioned sewer system is not isolated from the live sewer, entry to and work within the
new sewer system is subject to the provisions of Australian Standard AS.2865, ‘Safe working in
a confined space’.
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20.2 The construction engineer shall make the necessary arrangements for the new works to
be isolated from the live sewer prior to the commencement of construction and ensure that the
isolation is maintained until the final inspection clearance has been issued by the asset
inspector.
20.3 The new works shall be either not connected (physical break) or shall be physically
isolated from the live sewer. A physical break is the preferred method and should be used
wherever practical.
20.4 Where a physical break is not practical, the construction engineer shall apply to the
Corporation’s Building Services department to have the live sewer sealed off prior to
construction and removed following the issue of the final inspection clearance of the works.
20.5 The Water Corporation will notify the construction engineer in writing when the line has
been isolated (seal installed and ready for testing) and again when the isolation has been
removed.
20.6 Where the live sewer has been plugged (150 or 225mm sewers), the construction
engineer shall arrange for the plug to be tested to 50 kPa for one minute with no drop in
pressure. The test shall be conducted on the ‘upstream’ side of the plug prior to any entry by
Corporation staff. The test shall be logged in the construction engineer’s log of inspections and
tests.
20.7 Where an isolation of a live sewer involves sealing with a plastic membrane and
brickwork (sewers 300mm and above), it is the responsibility of the construction engineer to
develop and administer a test plan over the period of isolation to ensure the integrity of the
isolation.
21 Construction Phase – Inspection of works during construction
21.1 In general, inspections will not be undertaken by the Corporation during construction of
the works; however the Corporation reserves the right to request an inspection at any time for
the purposes of auditing compliance.
21.1.1 The construction engineer shall make provision for access by Corporation officers or its
representatives to inspect the works during construction when requested.
21.1.2 The asset inspector (including additional staff) shall have access to the site at any time
provided the construction engineer or contractor is on site.
21.1.3 Inspections by the Corporation do not in any way relieve the construction engineer of
the responsibility for ensuring that construction of the works is in accordance with the design
documents and that it complies with the requirements of the technical manual or design
standard.
21.1.4 The construction engineer shall arrange for the provision of all personnel and
equipment required for any scheduled inspection and testing.
21.2 Construction Engineer’s Log of Inspections and Tests
21.2.1 The construction engineer shall arrange and undertake inspection and testing of the
works to ensure that the requirements of the technical manual or design standard are
satisfied. The construction engineer shall maintain a log of all inspections and tests
undertaken, which shall be presented to the Corporation, if requested. The log shall record
the following information:
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Inspections and/or tests witnessed by the construction engineer of the works, which
were considered satisfactory. To this effect the construction engineer shall sign the
following statement on the construction engineer’s log: “I am satisfied that the above
inspection and tests have been carried out.”
Inspections and / or tests witnessed by the construction engineer of the works, which
were considered unsatisfactory.
Any remedial action undertaken to the works as a result of an unsatisfactory inspection
prior to re-inspection.
21.2.2 A copy of the construction engineer’s inspection log and test results shall be submitted
to the asset inspector prior to a final inspection being undertaken. The log shall include but
not be limited to the date, time, item tested, type of test, result of test and the name of the
witness.
21.3 Site Safety
21.3.1 Asset inspectors will comply with the contractor’s site safety procedures while on site.
21.3.2 Asset inspectors will not enter sites that they consider unsafe by Worksafe Standards.
21.3.3 Where safety issues relating to the inspection cannot be resolved between the
construction engineer and the asset inspector they shall be referred to Worksafe for
advice/resolution.
21.4 Pre-Handover Inspection and booking of a final inspection
21.4.1 At least two (2) weeks prior to a planned final inspection date the
construction engineer shall contact the Corporation’s inspections contact and make a
tentative booking for a final inspection.
21.4.2 The construction engineer shall then confirm and book a final inspection giving a
minimum of 5 business days notice.
21.4.3 Prior to confirming a booking for a final inspection the construction engineer shall
undertake a pre-handover inspection.
21.4.4 A pre-handover inspection checklist shall be completed by the construction engineer
and provided to the asset inspector with all test logs at the time of confirming a final
inspection date.
21.5 Final Inspection
21.5.1 When the works have been completed and the construction engineer has conducted a
pre-handover inspection, the construction engineer shall arrange a final inspection with the
asset inspector.
.The asset inspector will inspect the works with the construction engineer in attendance.
21.5.2 Where the number and/or seriousness of non-conformances indicate that the pre-
handover inspection has been inadequate the asset inspector shall terminate the final
inspection and require the construction engineer to carry out further inspection of the works
before booking another final inspection. A fee may be charged to the developer where a pre-
handover inspection is deemed to have been inadequate.
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21.5.3 Where the works are deemed to be acceptable the asset inspector shall arrange for a
final inspection clearance to be issued to the construction engineer.
22 Construction Phase – Connecting to existing assets
22.1 Connections or alterations required to the Corporation’s existing infrastructure as a result
of new works shall be made by prior arrangement with the Corporation. All such work shall be at
the developer’s expense.
22.2 The construction engineer shall make the necessary arrangements for the payment of
fees for the connection of the new works to the existing assets.
22.3 When the works are deemed to be acceptable, the asset inspector shall initiate the
connection of the works upon the request from the construction engineer.
22.4 Works will not be connected to existing assets until payment of all associated fees has
been made and a final inspection clearance has been issued.
23 Takeover Phase – As-Constructed drawings
23.1 The as-constructed drawings shall be certified "as-constructed", signed and dated by the
design engineer, the construction engineer and by the surveyor (who is eligible for membership
of I.E.M.S.A. or I.S.A.) responsible for the survey. The as-constructed drawings shall be in
accordance with the relevant technical manual, design standard or this manual.
23.2 The completed and signed as-constructed submission shall be submitted to the as-
constructed submission contact.
23.3 All as-constructed plans shall clearly display the Planset number which shall have the
bundle number revised to indicate that it is an as-constructed plan, as per DS 80.
23.4 One copy of the as-constructed submission shall be submitted except where specified
below.
23.5 As-constructed Information for Water works
The as-constructed information shall consist of:
23.5.1 The as-constructed plan in accordance with the typical information provided in Water
Corporation Design Standard 60 or 63.
23.5.2 A precalculated cadastral plan for areas which are not sewered, in electronic form
whenever possible and particularly for large areas; otherwise a hard copy for small
subdivisions.
23.5.3 A copy of the final new works site inspection report.
23.6 As-constructed Information for Wastewater works
23.6.1 The as-constructed plan in accordance with the typical information provided at
Appendix 9 of this manual.
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23.6.2 All aspects of Section 6 of Design Standard 50 must be complied with, other than the
as-constructed plan mentioned at 22.5.1. replacing all references to field notes.
23.6.3 A precalculated cadastral plan, in electronic form whenever possible and particularly for
large areas; otherwise a hard copy for small subdivisions.
23.6.4 A copy of the final new works inspection report.
23.6.5 A contour plan if earthworks have been carried out that has changed a contour by 0.5
metre or more.
24 Takeover Phase – Takeover of the works
24.1 Requirements for takeover
Subject to connection to the existing system being available, takeover is achieved when:
24.1.1 A final inspection has been completed and a final inspection clearance has been issued
by the asset inspector.
24.1.2 The construction engineer has certified that the works have been constructed in
accordance with the documents accepted by the Corporation and the requirements of the
technical manual or design standard.
.
24.1.3 The construction engineer has certified that restoration has been performed to the
satisfaction of any affected property owner and authorities.
24.2 Date of Takeover
The Corporation will notify the developer in writing that takeover has been achieved.
The date the Corporation takes over the works will be the date that final inspection clearance has
been issued
25 Takeover Phase – Warranty Period
25.1 The warranty period shall commence on the date of take-over.
25.2 The warranty period shall be for one year.
25.3 During the warranty period, the Corporation shall be responsible for operational
maintenance of the Works.
25.4 Remedial repairs during warranty
25.4.1 During the warranty period the developer shall be responsible for ensuring that
satisfactory remedial repairs arising from faulty design, workmanship or materials are carried
out. The cost of any consequential damage and claims resulting from such defects shall be
charged to the developer.
25.4.2 During the warranty period, the Corporation may, at its discretion carry out remedial
repairs where the fault affects the service to customers and/or public safety. The Corporation
will notify the developer of the work carried out as soon as practicable where the remedial
repairs are attributable to the construction of the works. The cost of the remedial repairs shall
be charged to the developer.
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