Average age of bridges and overpasses in British Columbia, which accounted for 9% of total public infrastructure stock in 2007, did not show much change since the mid-1980s when it hit an historic low of 21.3 years for the first time. The trend has been fairly flat since then, as the age fluctuated between 21.3 and 23.1 years. Investments in recent years in this asset were at a level just sufficient to maintain the average age of bridges in British Columbia under the national average.
As a percentage of estimated useful life, British Columbia matched the national average in the early 1990s, but has since been under it. In 2007, bridges and overpasses in British Columbia had reached 53% of their estimated useful life, compared with 57% nationally.