SUSTAINABLE INFRASTRUCTURE

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SUSTAINABLE INFRASTRUCTURE

• December 2008

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Sustainable Infrastructure

• Sustainability of Infrastructure is about
  correct design (including cost recovery
  affordability) and maintenance over the life of
  the infrastructure
• Consideration Given To
• Roads
• Sewage Network and Treatment
• Water Purification and Network
• Storm Water
• Electrical Reticulation

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Roads

• Road design is based on geometrical and pavement
  design
• Geometrical design is set for the lifetime of the
  road
• Pavement design incorporates certain maintenance
  actions along the life of the road structure
• For pavement design roads are divided into four
  categories
• Category (A)- Road Class 1,2 Freeway Major
  Arterial
• Category (B)- Road Class 3,4 Minor arterials
  and collectors
• Category (C)- Road Calls 5(a), 5(b) Residential
  access collectors and car parks
• Category (D) Road Class 5(b), 5(f)- Local
  access roads, loops, cul-de-sac etc

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Roads

• Category A Maintenance
• Lower capital cost with structural design for 20
  years
• Resurfacing at 12 years
• Structural rehabilitation at 20 years
• Resurfacing at 26 years
• Higher capital cost with structural design for 30
  years
• Resurfacing at 8, 16, 23 years

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Roads

• Category B Maintenance
• Structural design for 20 years
• Resurfacing at 12 years
• Structural rehabilitation at 20 years
• Resurfacing at 26 years
• Category C Maintenance
• Structural design for 20 years
• Resurfacing with overlay 10 years and patch
  repair as and when required
• Category D
• Resurface and patch repair 12 years

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Sewage Network and Treatment

• Sewage Treatment
• Design is based on per capita usage
• Design should be modular
• Design treatment works for regular maintenance of
  plant without have to shut plant down
• Maintenance schedules should be documented (e.g.
  daily maintenance, monthly, annual etc)
• Maintenance staff should be well trained
• Full compliment of maintenance staff required
  (electrical, fitters, welders, foreman etc)
• Fully stocked maintenance store required

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Sewage Network and Treatment

• Sewage Network
• Design is based on per capita usage
• Network should be designed for ease of access
• Maintenance schedules should be documented (e.g.
  daily maintenance, monthly, annual etc)
• Maintenance staff should be well trained
• Full compliment of maintenance staff required
  (electrical, fitters, welders, foreman etc)
• Fully stocked maintenance store required

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Water Reticulation and Purification

• Reticulation
• Water a scarce commodity
• Need for meters to measure consumption and
  leakage
• Water reticulation is pressurized
• Maintenance of network to minimize leaks,
• Maintenance of pressure valves etc
• Maintenance schedules should be documented (e.g.
  daily maintenance, monthly, annual etc)
• Maintenance staff should be well trained
• Full compliment of maintenance staff required
  (electrical, fitters, welders, foreman etc)
• Fully stocked maintenance store required

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Water Reticulation and Purification

• Purification
• Purification plants designed per capita demand
• Maintenance schedules should be documented (e.g.
  daily maintenance, monthly, annual etc)
• Maintenance staff should be well trained
• Full compliment of maintenance staff required
  (electrical, fitters, welders, foreman etc)
• Fully stocked maintenance store required

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Storm Water Drainage

• Design influenced by catchment factors, slope
  runoff surface, predicted storm size and
  frequency
• Maintenance often over looked however schedules
  should be documented (e.g. daily maintenance,
  monthly, annual etc)
• Maintenance staff should be well trained
• Full compliment of maintenance staff required
  (electrical, fitters, welders, foreman etc)

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Electrical Reticulation

• Maintenance schedules should be documented (e.g.
  daily maintenance, monthly, annual etc)
• Replacement of cables, transformers and
  switchgear required and frequency needs to be
  determined
• Maintenance staff should be well trained
• Full compliment of maintenance staff required
  (electrical, fitters, welders, foreman etc)

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Maintenance Planning

• All services require maintenance plans that
  detail
• Item to be maintained
• Frequency of maintenance
• Shut down/isolation procedures
• Stock required in stores
• Communication with stakeholders
• Staff compliment and plant required
• Authorization sequence
• Cost of maintenance program for each item

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Maintenance Planning Required for New
Infrastructure Investment
Infrastructure Spend 2006-2010 R 420 billion
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Maintenance Planning Required for New
Infrastructure Investment Including Peter Mokaba
Stadium