1 launch of development & construction manual launch shepparton 2 may 2007 broadford 9 may 2007...

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Launch of Launch of Development & Development &

Construction Construction ManualManual

LaunchLaunchShepparton 2 May 2007Shepparton 2 May 2007Broadford 9 May 2007Broadford 9 May 2007

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INTRODUCTION TO INTRODUCTION TO DEVELOPMENT & DEVELOPMENT &

CONSTRUCTION MANUALCONSTRUCTION MANUAL Les Goudie – Manager Network Planning Les Goudie – Manager Network Planning

& Development& Development

• Welcome

• Introduction to the Manual

• Benefits for developers, consultants & GVW

• GVW expectations of consultants &

contractors

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Development & Development & Construction ManualConstruction Manual Steven Nash & Ignatius Steven Nash & Ignatius

AlampiAlampi• Manual comprises of

– Melbourne Retail Water Agencies (MRWA) water supply & sewerage codes

– Goulburn Valley Water (GVW) supplements to the MRWA codes

– GVW sewage pump station design manual

– Standard proformas and operating instructions

– Construction Agreements

– Process flowchart

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Developers Actions Authority Action

Preliminary subdivision and servicing proposal

Authority Review and provision of existing services information

(if requested)

Preliminary Conditions

Authority Review

Offer / Agreement DEVELOPER IS PRINCIPAL

Authority Review

Independent Authority Audit

Preliminary Acceptance

Acceptance by Authority

Certificate of Release

Feasibility Report

Detailed Design

Construction

Commissioning

Maintenance Period

Asset Transfer to Authority

Preliminary Acceptance Conditions

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MRWA Water Supply MRWA Water Supply & Sewerage Codes& Sewerage Codes

• GVW is using the MRWA edition of the Water Services Association of Australia (WSAA) Water Supply and Sewerage Codes

• These codes replace Goulburn Valley Water and Water Industry Technical Standard (WITS) codes

• Available from WSAA Victoria

• GVW will review any new versions

• Advise upon acceptance and update Manual as required

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WaterWater• Changes from previous standards

−All mains to be looped in court ends

−Water mains up to and including 300mm diameter allowed in PVC

−Cover reduced as per MRWA

• DICL pipe under roads still required

• Pipe material accepted−Refer to Water Services Association of

Australia (WSAA) technical selection chart

−OPVC, uPVC, MPVC, PE, DICL

−To be a minimum of Class 12 and stiffness of 10,000Nm

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SewerageSewerage• Changes from previous GVW Standards

−PVC sewers allowable in all residential areas (including Shepparton)

−CCTV inspection of all new sewers−Marker tape required above all sewer

rising mains−Max length of property drain 10m

• Variations from MRWA– 1.0m clearance required from outside

pipe to boundary and/or easement – Maintenance Shafts are not approved

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Sewage Pump Sewage Pump StationsStations

• Changes from previous GVW Standards−Minimum internal diameter of 2m

−PE for discharge pipe work

−No light weight or thin walled fittings

−New permanent hand rail system

−Flow meters on all distribution pump stations

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Feasibility Feasibility ReportsReports

• Project Initiation to GVW

• To be completed in accordance with pro-forma

• Need to include justification for any GVW

contributions to project costs and GVW is to be

treated as a client

• Common omissions– Developers name for the Deed of Agreement

– Overall Servicing Strategy plan

– Plan of Subdivision

– GVW Contributions• Need to keep GVW informed of tenders, variations

and extras for expenditure relating to GVW contributions

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ProcessProcess• Certification forms updated and now

include– Reference to new codes– CCTV inspection details

• GVW requires adequate time to process and arrange inspections, where required, for– Feasibility Reports – Preconstruction – Water main shutdown – Confined Space Entry – Preliminary Acceptance

• CCTV tapes/report to be provided• Justification report of GVW expenditure, if

required

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Construction – Construction – WaterWater

Peter FrenchPeter French• Water assets to be constructed in

accordance with MRWA Water Code and GVW’s supplement

• Common Non-Conformances– Unsupported hydrant and valve covers

– Inadequate anchor and thrust blocks (concrete preferred)

– Hydrant & valve marker posts• Not installed correctly

• Offsets not clearly painted onto posts (80mm high)

• Non approved marker posts used (Note: GVW valve marker posts are black rather than MRWA blue)

– No corrosion protection applied to Flanges & Gibaults

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Construction – Construction – WaterWater

• AC Handling– Ensure contractors are meeting Workcover

requirements – Submit form to Workcover as required. Form

to be submitted to Goulburn Valley Water also

• Connections (cut ins) under pressure are preferred

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Construction – Construction – SewerSewer

• Sewer assets to be constructed in accordance with MRWA Sewer Code and GVW’s supplement

• Common Non Conformances– Poorly constructed maintenance hole bases– Step irons installed incorrectly (first step should be

between 500-600mm from top of maintenance hole)

– Maintenance hole covers overfilled with concrete (should be installed in accordance with manufacturers requirements and key holes left clear)

– Properly constructed jump-ups chased into the trench wall to allow compaction next to the connections

• Channel Baskets must be used to catch debris

• Confined space notice to be submitted to GVW prior to entry into a live Authority sewer

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Endorsement of Endorsement of DesignsDesigns

Steven Nash & Ignatius Steven Nash & Ignatius AlampiAlampi

• Design Plan– Pipe material and class – Offsets from boundaries– GVW endorsement template– Reference to correct standards/codes

(MWRA edition, GVW supplements)

– Other civil infrastructure (SWD, roads, etc)

– Fittings clearly labelled– Plans produced to reasonable size e.g.

text legible– 3 copies

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Preliminary & Preliminary & Final Final

AcceptanceAcceptance• GVW may audit the site upon request by the

consultant for Preliminary & Final Acceptance• Consultant is expected to have visited the site• Joint inspections are encouraged• GVW frequently receives requests directly

from developers for compliance immediately upon submission of documents for Preliminary & Final Acceptance

• Consultants to inform clients on status of projects

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Preliminary & Preliminary & Final Final

AcceptanceAcceptance• Preliminary Acceptance Issues

– Sewer – CCTV Inspection report to be included after review by consultant

– Actual costs– Justification, documentation for

GVW contributions

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Trench BackfillTrench BackfillDamien Byrne – BM Damien Byrne – BM

ConsultingConsulting

• Methods of compaction• Difference between standard &

modified compaction testing• Optimum moisture content • Watering in

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• GVW encourage feedback and comments from industry, particularly consultants & contractors who use the documents

• The Development & Construction Manual is available on the GVW web page

• Water and Sewer Codes are available from WSAA Victoria

• Advice to consultants & contractors via email of updates and important information

SummarySummary

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DiscussionDiscussion&&

QuestionsQuestions

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Thankyou for Thankyou for your your

attendanceattendance

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