Infrastructure Density looks at the City’s efficiency in providing infrastructure. It is calculated as a ratio of the city’s population divided by the quantity of infrastructure assets. The quantity of infrastructure assets is represented by the total estimated length of the following:
- Arterial, collector and local roads (centre-line kilometres)
- Alleys (kilometres)
- Sidewalks (kilometres)
- Sanitary, storm and combined sewers (kilometres)
The infrastructure data for a particular year is based on information from City Operations as of the end of the previous year. For example, the 2016 quantity of infrastructure assets is based on the data as of December 31, 2015. It should be noted that although assets are reported on an annual basis, some assets are not physically assessed every year. There may have been some revisions to data for this year and prior years related to sanitary, storm and combined sewers (kilometres). In 2016 Drainage Services moved to leveraging DRAINS (Drainage Inventory Network System) as the single source for Inventory information for reporting and analysis. This database contains very detailed attribute information at the individual asset (per pipe, per manhole, etc.) level. DRAINS has been in place for many years, and is the most comprehensive source of data that exists for the drainage system. This is the system used to record and map all drainage assets.
Previous inventory reporting methodology was not solely based on drains, as it considered numerous sources; asset accounting, input from private development projects, in-house construction projects, and some drains analysis. This process was more of an estimate rather than linked to individual assets. Data has thus been revised retroactively to represent the more accurate information that is now available and this revision will ensure that data is consistent from year to year. The dataset was updated in 2016 to reflect the updated methodology.
This measure helps assess the sustainability of the city’s overall infrastructure. Incrementally more people are making use of the existing infrastructure, which increases sustainability and cost effectiveness.
Data Sources: Infrastructure data is from City Operations and Lifecycle Management; Population information is from Statistics Canada, Municipal Census and the City of Edmonton Chief Economist estimates.
Explanation of Performance
The 2017 result of 56.5 shows an increase of 6.0% from 2016’s result.
The general trend since 2012 has been a slow steady increase and
then a plateau from 2014 to 2016. This measure is based on the
overall population growth of the city of Edmonton, it is contingent
on the city seeing steady population growth, which is impacted by