Gurrundah Road at Sandy Creek Rd, Chinamans Lane, Gurrundah Road at Baw Baw bridge and Towrang Rd at the bridge are all closed. The water is stiull rising at Towrang, Goulburn SES reports.

Goulburn Mulwaree Council is also alerting people to water over the road at Painter's lane, Bullamalitta Road and Windellama Road at Hawkes Lane.

In Goulburn, May Street at the bridge, Blackshaw Road, Park Road, the Goulburn Golf Course bridge and the Eastgrove Subway are also cut to traffic.

Several other roads were closed on Wednesday but have since been opened. These are Currawang Rd at the Komungla Bridge, Breadalbane Rd and Parkesbourne Rd.

​Goulburn registered 20mm from early Wednesday through until Thursday morning. At Bradfordville, Leon Oberg reported 27mm, plus 4.5mm from the weekend. The district recorded more, including Roslyn at 39mm to 49mm. 

While not normally enough to close roads, Goulburn SES controller Robert Bell says continuous falls over the past month or more are responsible for the build-up.

“We’ve had 20mm on average across across different parts,” he said.

“Some have had more, some less but all the watercourses are already near full so it doesn’t take much to fill them up.

“More rain is headed our way and if it gets over the range, it will be more than just a shower.”

The SES had teams out on Wednesday night monitoring.

At Komungla Bridge on Wednesday, personnel were told by locals that a person had been trapped after driving through the causeway but a tractor pulled the vehicle out.

Mr Bell remains exasperated by people driving through flood water.

“We are constantly out there telling people not to do it,” he said.

The Wollondilly River at Marsden Weir is gushing and Eastgrove waters are still rising but Mr Bell doesn’t expect it to inundate homes.

Nevertheless, two flood rescue teams are monitoring locations that typically flood.

Goulburn has recorded 91.4mm of rain across 18 days this month. It is nearly twice the 43-year average to 2014 of 49.2mm and is nudging the wettest year (97.8mm) in 1997, according to Weatherzone.