Australian first for Sewer Network

Management Network modelling to develop an Asset Management Plan

8th Dec 2016

Agenda

2

1. Why improve Sewer Asset Management 2. Icon Sewer Network 3. New approach AECOM/ SEAMS UK.

1. Why improve Sewer Asset Management

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Regulatory Submission

Driving timeline for improvement

Sewer Network Asset

Management Improvement

Asset Management Excellence

Driving Prudent programme, efficiently done

New Business Processes

Driving documentation of new processes.

New Computer Systems

Driving need for new software.

ISO 55000

Cost, Risk & Performance to customers

Re Organisation

Reliability/ Planning roles & Training.

1. Why improve Sewer Asset Management

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Current approach : • not driven by customer requirements. • High preventative and reactive Maintenance spend. • Blockage rate, higher than national average. • CCTV inspections , low hit rate. • no integration of GIS, Condition Grading, Failure data.

National Performance Report 2014-15 time

2008

Reactive

Sewer Model Strategic Ian Mc Rae

2016

Mat

uri

ty

New Model Strategic + Tactical

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Mini Catchment Hot Spots drive cleaning, CCTV, Repair & renewals (reticulation system <300mm).

2. Icon Network

Mini catchment: •Calculate number failures + Length. •Gives failures per 100km. •Rank all Mini Catchment. •Clean + CCTV the worst. •CCTV drive repair or replacement.

2. Icon Network

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Network expansion and material of its life

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2. Icon Network

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2. Icon Network

Blockage rate over time (drought break & preventative prog from 2010)

30 National Ave

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Blockage by material and pipe diameter

Material Number of blockages Percentages

Clay 13,095 65.72%

Concrete (Reinforced) 5,372 26.96%

Polymer (PE, PVC) 1,392 6.99%

Metal 59 0.3%

Other 8 0.04%

Factors influencing blockage include: •soil type and compaction. •Soil moisture. •pipe material. •sewerage configuration and trade waste. •Pipe age. •Pipe location (road, verge, pathway). • Sewage volume flow. • Rainfall or drought. •Tree root intrusion

Network Performance over 10yrs

2. Icon Network

3. The new approach

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•Limited analysis & modelling optimization capability in Australia. •Engaged AECOM and SEAMS UK. •Track record , delivering Utilities customer requirements at minimum cost.

•Scottish Water, Yorkshire Water, Severn Trent Water and South West Water. •Track record, Regulatory compliant investment plans, UK’s Office of Water (OFWAT). • SEAMS developed software with University of

Exeter (UK) and Services for: • Forecast results for network management

scenario’s. • Find least cost solutions. • Visualize results with simple graphics. • Develop execution plans. • Analyse and Optimize GIS, failure history ,

asset condition data.

3. The new approach

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Assets

Intervention

Costs

Stakeholder: Customer

Regulatory Authority

Asset Condition

Optimiser

3. The new approach - Detail

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The new approach will: •Optimize for Cost, condition, blockage, collapse, internal flood, external flood, pollution. •Customer focus: Internal/ext Flood, pollution instead of interruptions (collapse/ blockage). •Balance regulator/customer drivers to manage future network integrity by setting agreed asset condition targets. •Consider critical asset integrity, sewer beside a waterway, allow condition to be managed. •Deliver lowest cost programme of works including:

•Individual pipes to be cleaned, CCTV, Repaired and Renewed in GIS (1,5,20yrs) •Improve CCTV “hit rate” 40% to 60% (currently 60% inspected do not require replacement or repair).

3. The new approach

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Dash board provides a visual, interactive summary of results

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Icon Water

Thanks you Additional Slides Only

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Element or Facility Description of activity Frequency Yearly total

Reticulation Sewer Mains

(<300mm)

CCTV (selected from mini catchments of hot spots analysis) Derived from Hot Spots database 50 km

CCTV (selected from priority pipes analysis) Priority pipes from multiple blockages

CCTV ( selected for locating and repairing manhole) As required ~2.0 km

Reticulation Sewer Mains

(<300mm)

Clean by Root Cutting, Jet Rodding and Hand Rodding (selected from priority

pipes analysis) Priority pipes from multiple blockages 300 km

Quality Control CCTV Only (selected after Reticulation Cleaning/Jet Rodding) Within 3 weeks of cleaning) 24 km

Clean by Jet Rodding Fat Prone and Other Critical Sewer Mains 2 Year Cycle 5.1 km

Maintenance Holes

Locate, Inspect, Clean and Repair, Adjust Height, Replace or reseat Rings and

Lids. As required

350

Inspection and maintenance of MH near sensitive waterways 1 Year Cycle

Mains and Maintenance Holes Dig up and Repair Reticulation Mains and Service Ties, Reinstate Area. As Required 226 Dig ups/yr

Trunk main (>300mm) Clean by Jet Rodding, Root Cutting and Debris Removal

(including Acton Siphon) As Required 12.8 km

Trunk Mains Maintenance

Hole

Condition assessment of specific MHs with focus on conditions and I&I ingress,

potential. As required 6.1 km

Mains including all valves &

appurtenances Inspection and maintenance, installing marker, clean around chamber 3 yearly cycle 39 assets

Current Sewer Network Programme

Icon Network

3. The new approach

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3. The new approach

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Proven results such as Severn Trent Water UK