Council is responsible for around 12,000 stormwater drainage pipes which are predominantly located under road reserves and run to a length of nearly 300km.
Council is also responsible for around 12,100 drainage pits, headwalls or other inlet structures, and a range of open drainage channels.
This stormwater system plays a crucial role draining rainwater from private and public buildings, streets and open space, particularly during heavy rainfall events.
However, this stormwater infrastructure has largely not been renewed since being built when the Ku-ring-gai area was first developed between the early to mid-1900s.
Recent reviews have found that 43% of Council’s stormwater assets were classified as being in a poor or very poor condition, with many of the assets coming to the end of their useful life and not operating as efficiently as they should.
Council currently only has available funds to renew around 900m of stormwater pipes and 30 kerb inlet pits each year.
Council’s infrastructure works backlog for stormwater currently stands at $41 million and, without the proposed rate increase, will grow to $79 million by 2034/35.
This will result in increased localised flooding, road closures and contamination of local waterways, along with more potholes, subsidence and road repairs.
With the proposed rate increase, Council would be able to renew 6.9km of stormwater pipes each year (that is a seven times increase in activity) and 250 inlet pits (an eight times increase in activity).
The infrastructure backlog would reduce to $13 million by 2034/35.
See an indicative list of all stormwater assets to be refurbished or replaced under the proposed rate increase here.