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  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 9MBEffects
2.3 m
  • Water begins flowing over Bibbawarra Crossing
2.8 m
  • Lewers creek commences flowing
3.5 – 4.0 m
  • Lewers Island is now isolated
4.0 – 4.5 m
  • Grahams gully flowing
4.5 m
  • Gully overflows through Fahls gully and Lyalls gully
5.0 – 5.5 m
  • Water flows over North River Road approximately 1 km west of Bibbawarra crossing
5.5 m
  • Fusible levee at Sheridans Gully will be overtopped
  • Low lying plantations near Lewers Creek area will flood
6.5 m
  • Water flows over North West Coastal Highway at Geraldton turnoff
  • Water Flows across South River Road in vicinity of Giles Rd
  • Water is no longer contained in river channel and will start to break out
  • The old Nine-Mile Bridge would have been overtopped
  • Carnarvon town is now isolated by road
6.6 m
  • Water begins flowing into McNeil Clay pan towards Nickol Bay
6.7 m
  • All breakouts likely to be flowing both north and south of River
  • Water flows into Plantation Caravan Park
6.8 – 7.0 m
  • Water overflow into McGlades Road area
  • Boundary Road Levee would be overtopped if not reinforced
7.0 – 7.6 m
  • Water flowing over South River Road and East Carnarvon (east of Boundary Rd)
  • Water begins flowing into Kingsford area (Gibson & Glaris Roads)
  • Water flowing out of Nickol Bay Flats via North West Coastal Highway at 6 Mile south of Browns Range
7.6 – 7.8 m (7.77 m is highest ever level, Dec 20 2010)
  • Water flowing into Nickol Bay in excess of 1 metre deep over North West Coastal highway
  • Water flowing across Northwest Coastal Highway T section at approximately 1.5 metres
  • Water flowing through most of the Kingsford area

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