| ELECTRICITY, GAS, WATER AND WASTE SERVICES: |
| Water supply: |
| Assets used by irrigation water providers: |
| Drainage
channels (measured from the point of intersection with another drainage
channel to the following intersection) | 100 years | 2.00% | 1.00% | 1 Jan 2005 |
| Sewerage and drainage services: |
| Chemical dosing pumps | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Dams: |
| Lined earth dams | 100 years | 2.00% | 1.00% | 1 Jan 2005 |
| Dam covers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Effluent outfalls: |
| Shoreline ocean | 100 years | 2.00% | 1.00% | 1 Jan 2005 |
| Extended ocean | 100 years | 2.00% | 1.00% | 1 Jan 2005 |
| River or estuary | 100 years | 2.00% | 1.00% | 1 Jan 2005 |
| Methane gas and cogeneration assets - see Table A Electricity supply (26110 to 26400) and Gas supply (27000) |
| Pump sets (incorporating switch boards, starters, motors and pumps) | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sewage pump station assets: |
| Detention tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Overflow screens | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sewage service connection assets: |
| Low pressure pumps | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Vacuum pumps | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sewage treatment assets: |
| Air filtration systems | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Air scrubbers | 10 years | 20.00% | 10.00% | 1 Jan 2005 |
| Chemical blowers | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Chemical feeders and hoppers | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Chemical mixers and blenders | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Chemical storage tanks | 30 years | 6.67% | 3.33% | 1 Jan 2005 |
| Grit removal assets | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Penstocks | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Screenings removal assets | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sludge processing assets: |
| Anaerobic digesters | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Anaerobic digester gas handling and blowing systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Anaerobic digester heating systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Bio-filters | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Dissolved air flotation systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Lime disinfection dosing units | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sludge dewatering assets: |
| Belt presses | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Centrifuges | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Screw conveyors | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Screw presses | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Sludge driers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Sludge heating units | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Sludge thickening tanks (incorporating scrapers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Treatment assets: |
| Primary treatment assets: |
| Primary clarifiers (incorporating scrapers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Primary sedimentation lagoons | 50 years | 4.00% | 2.00% | 1 Jan 2005 |
| Primary
sedimentation tanks (incorporating scrapers and weirs) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Scum collection and transfer systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Secondary treatment assets: |
| Biological nutrient removal (BNR) assets: |
| Aerators and blowers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| BNR
tanks (incorporating mixed liquor stream, anoxic, anaerobic and swing
zones and diffusers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Mixers | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Secondary clarifiers (incorporating scrapers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Secondary treatment lagoons | 50 years | 4.00% | 2.00% | 1 Jan 2005 |
| Secondary
treatment tanks (incorporating scrapers and weirs) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Sequenced batch reactors | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Sludge aerators and blowers | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Tertiary treatment assets: |
| Backwash air blowers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Chlorine contact tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Filtration tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Reverse osmosis assets: |
| Fine screening systems | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Micro filtration units | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Reverse
osmosis membrane filtration units | 10 years | 20.00% | 10.00% | 1 Jan 2005 |
| UV disinfectors | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Water storage tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Sewerage control systems assets: |
| Chlorine residual analysers and pH meters | 7 years | 28.57% | 14.29% | 1 Jan 2005 |
| Dissolved oxygen probes, level sensors, transmitters and meters | 10 years | 20.00% | 10.00% | 1 Jan 2005 |
| Flow meters | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Telemetry (including modems and remote transfer units) | 10 years | 20.00% | 10.00% | 1 Jan 2005 |
| Variable speed drives (VSDs) | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Sewer
mains: Being lengths of collection sewers measured from manhole to
manhole (including branch, main, pressure, reticulation, sub-main and
trunk sewers) (not being in the nature of a repair) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Valves: |
| Generally | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Pressure reducing valves | 30 years | 6.67% | 3.33% | 1 Jan 2005 |
| TRANSPORT, POSTAL AND WAREHOUSING: |
| Tramway and light rail passenger transport services: |
| Infrastructure assets: |
| Trackwork (incorporating track drainage): |
| Ballasted track | 25 years | 8.00% | 4.00% | 1 Jul 2010 |
| Curved track | 20 years | 10.00% | 5.00% | 1 Jul 2010 |
| Embedded track | 30 years | 6.67% | 3.33% | 1 Jul 2010 |
| Points (excluding automatic points) and crossings | 20 years | 10.00% | 5.00% | 1 Jul 2010 |
| Track within depots | 40 years | 5.00% | 2.50% | 1 Jul 2010 |