Stormwater is the asset class most NSW councils know the least about — and the one where that gap costs the most when it fails.
Roads and buildings get inspected because you can see them deteriorate. Stormwater drainage runs underground, out of sight, until it doesn't work — and by then the failure usually shows up as flooding, property damage, or a legal claim, not a maintenance job.
A few reasons this asset class consistently underweights in council AMPs:
The register is often incomplete
Pipes laid before digital records existed, informal connections added over decades, easements that were never surveyed. You can't manage condition on assets you haven't confirmed exist.
Condition assessment is expensive and disruptive
CCTV inspection of underground pipe networks costs more per metre than visual inspection of an above-ground asset, and it competes for the same limited renewal budget as the roads and buildings everyone can see. The assets that are hardest to inspect tend to get inspected last.
Failure consequence is high, but failure probability looks low — until it isn't
A blocked or collapsed pipe rarely fails gradually. It fails during a storm event, when demand on the system peaks and the cost of failure — property damage, business interruption, liability exposure — is highest.
The risk sits with the council either way
Whether or not the AMP reflects it, a council carries the liability for a drainage failure that damages private property. An AMP that's silent on stormwater condition isn't managing that risk down. It's just not showing it.
The fix isn't a full network CCTV program overnight. It's a risk-based prioritisation — critical trunk drainage and known problem catchments first — backed by a register that's honest about what's confirmed and what's assumed.