Infrastructure Asset Useful Lives Report
The Infrastructure Asset Useful Lives Report is a report written by Tonkin Consulting in March 2009 for the Local Government Association of South Australia. The full title of the report is "Infrastructure Asset Useful Lives - SA Councils' Current Practices".
The report collates asset useful life data contributed by 14 South Australian Councils.
Data from a number of tables included in the report is given below.
Urban Sealed Surface Lives
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Normal Use Hotmix | 11 | 20 | 30 | 26 | 25 |
| High Use Hotmix | 8 | 18 | 28 | 22 | 21 |
| Normal Use Spray Seal | 13 | 13 | 30 | 20 | 20 |
| High Use Spray Seal | 7 | 15 | 22 | 18 | 20 |
| Normal Use Cold Overlay | 8 | 10 | 25 | 16 | 15 |
| High Use Cold Overlay | 3 | 7 | 16 | 13 | 15 |
Urban Sheeted Lives
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Township Sheeted | 9 | 5 | 20 | 15 | 15 |
Rural Sealed Surface Lives
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Normal Use Hotmix | 3 | 19 | 26 | 23 | 25 |
| High Use Hotmix | 2 | 16 | 26 | 21 | 21 |
| Normal Use Spray Seal | 2 | 16 | 30 | 22 | 20 |
| High Use Spray Seal | 1 | 15 | 20 | 17 | 16 |
| Normal Use Cold Overlay | 6 | 16 | 19 | 17.5 | 17.5 |
| High Use Cold Overlay | 6 | 16 | 16 | 16 | 16 |
Rural Sheeted Surface Lives
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Rural Arterial (Poor Material) | 2 | 5 | 13 | 9 | 9 |
| Rural Arterial (Good Material) | 6 | 10 | 20 | 15 | 14 |
| Rural Collector (Poor Material) | 3 | 5 | 24 | 12 | 8 |
| Rural Collector (Good Material) | 7 | 12 | 27 | 18 | 15 |
| Rural Local (Poor Material) | 3 | 6 | 19 | 12 | 10 |
| Rural Local (Good Material) | 7 | 15 | 35 | 23 | 20 |
| Rural Track (Poor Material) | 4 | 10 | 24 | 16 | 15 |
| Rural Track (Good Material) | 3 | 30 | 55 | 38 | 30 |
Road Pavements
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Normal Use | 11 | 50 | 100 | 77 | 80 |
| Heavy Use | 10 | 20 | 60 | 47 | 50 |
Footpaths
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Block Paved | 12 | 10 | 50 | 43 | 50 |
| Insitu Concrete | 13 | 20 | 50 | 44 | 50 |
| Hotmix | 12 | 20 | 50 | 29 | 28 |
| Spray Seal | 8 | 10 | 50 | 23 | 20 |
| Crusher Dust | 10 | 10 | 50 | 19 | 50 |
Kerb & Gutter
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Upright Kerb & Gutter | 12 | 40 | 75 | 65 | 70 |
| Median Kerb | 11 | 30 | 75 | 59 | 70 |
| Valley Drain | 10 | 40 | 75 | 65 | 70 |
Stormwater
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| RCP | 8 | 50 | 100 | 89 | 100 |
| FRC Pipe | 4 | 80 | 100 | 96 | 100 |
| uPVC | 5 | 20 | 100 | 70 | 80 |
| Box Culvert | 6 | 50 | 100 | 73 | 75 |
| SEP | 4 | 50 | 80 | 60 | 55 |
| Junction Box | 4 | 50 | 80 | 60 | 55 |
| Headwall | 5 | 50 | 80 | 58 | 50 |
| Lined Channel | 4 | 50 | 100 | 78 | 80 |
| Unlined Channel | 4 | 10 | 100 | 78 | 100 |
Community Wastewater Management System (CWMS)
| Asset | Sample (no.) | Lowest (years) | Highest (years) | Average (years) | Median (years) |
|---|---|---|---|---|---|
| Earthernware Gravity Pipe | 2 | 50 | 50 | 50 | 50 |
| PVC Gravity Pipe | 2 | 50 | 50 | 50 | 50 |
| PVC Rising Main Pipe | 2 | 50 | 50 | 50 | 50 |
| Pump Chamber | 3 | 30 | 100 | 60 | 50 |
| Pump | 3 | 30 | 50 | 43 | 50 |
| Pump Mechanical & Electrical | 3 | 25 | 50 | 35 | 30 |