Gascoyne River flow advice

Updates on the Gascoyne River flow
Last updated:

Latest river flow advice

River flow advice No. 07 2024 (PDF 240 KB)

After significant rainfall in the Gascoyne catchment we regularly update information on the 1800 674 897 message bank, via email and twitter.

For more information, please contact our Geraldton regional office on 08 9965 7400 or Carnarvon office on 08 9941 6100. 

River level and rainfall data

You can access river level and rainfall data from the Bureau of Meteorology or our river monitoring stations.

Gascoyne River flooding

What do the river heights mean for you?

After significant rainfall in the Gascoyne catchment we regularly update information on the 1800 674 897 message bank, via email and twitter.

Once heights at Fishy Pool and Jimba Jimba gauging stations have peaked, an analysis of 50 years of river flow data can be undertaken and accurate levels expected at Nine Mile Bridge can be given.

In the very large events (ie 1980, 2000, 2010), river levels at Nine Mile Bridge Carnarvon will already be greater than 7 metres when Fishy Pool peaks. Meaning preparations need to be undertaken before the peak at Fishy Pool.

The table below outlines some of the river flow effects at different river levels at Nine Mile Bridge. These may change depending on local rainfall and how the river flows.

Level at Nine Mile Bridge (m)Effects
2.3 m
  • Low level crossing at Bibbawarra Road is overtopped.
2.8 m
  • Water flowing in Lewers Creek.
3.5 – 4.0 m
  • Lewers Island is isolated.
4.0 – 4.5 m
  • Water flowing in Graham’s, Fahl’s and Lyall’s Gullys.
5.0 – 5.5 m
  • North River Road is overtopped approximately 1km west of Bibbawarra Road.
5.5 m
  • Sheridan’s Gully starts to flow.
6 to 6.5
  • Water flowing over North West Coastal Highway at Geraldton turnoff.
  • All breakouts flowing.
  • Gascoyne Junction Road is closed due to flow through Coburn Creek.
  • Overflow to McGlades Road area.
6.5 to 6.9
  • Water begins flowing into McNeill Claypan.
  • Carnarvon town is now isolated by road.
  • The old Nine Mile Bridge would have been overtopped.
  • Boundary Road levee would be overtopped if not reinforced.
6.9 to 7.2
  • Increased flooding in McGlades Road area spreading west toward North West Coastal Highway.
  • Properties along South River Road (outside of levee) flooded.
  • North West Coastal Highway overtopped between South River Road levee and Nine Mile Bridge.
Greater than 7.2
  • Water spreading through Kingsford area (Gibson and Glaris Roads).
  • Water flowing out of Nickol Bay Flats over North West Coastal Highway at 6 Mile south of Browns Range.

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