I found this:
http://www.hawkesburyhistory.org.au/...es/floods.html
Flood depths since 1799 till the last in 1992
Quote:
1988 July - 10.74
1990 April - 9.80M
1992 February - 11.00M
Flood types and effects
MINOR
From about 5.8 m Causes inconvenience, minor roads & low-level bridges affected.
MODERATE
From about 6.9m Overbank flow occurs with damage to low lying homes and farms. North Richmond Bridge closes at 8.4m and Windsor Bridge at 6.9m.
MAJOR
From about 12.2m Widespread inundation. Large areas flooded, towns & properties isolated & waters encroach. Extensive damage and hardship can occur.
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