Baw Baw Shire Council

Flood information for the Baw Baw Shire Council, encompassing local flood guides and a Municipal Flood Emergency Plan. 

On this page:

 

Baw Baw Shire council municipal map
Baw Baw municipal map.

Baw Baw Shire Council has a history of flooding, including significant flood events in May and June of 2012 leading to a number of roads being cut and properties being isolated. 

Baw Baw Shire experiences both riverine and flash flooding events, mainly in Warragul, Trafalgar, Walhalla and on the Moe River Flats between Yarragon and Moe. 

Most residential flooding occurs in townships along the Princes Freeway (Highway) corridor, including: 

  • Warragul

  • Drouin

  • Drouin South

  • Trafalgar

  • Yarragon

Are you at risk of flood? 

 

Longwarry flood guide map
Click to enlarge 

Longwarry is at risk of both flash flooding and flooding from the local drainage network ifthe capacity of the drains is exceeded.

Flooding does not occur from the Tarago or Bunyip Rivers. Flash flooding occurs when the amount of rainfall from a storm is greater than the capacity of the existing drainage system to carry it away, resulting in water pooling in lower lying areas.

Often flooding happens when the ground is already saturated and cannot absorb any more water.

Even a small amount of additional rain will flow over land and into properties in low lying areas of Longwarry, especially near Mackey, Corduroy, Martin and Johnson Drains.

These areas are more regularly affected by short duration flash flood events, where water cannot drain away fast enough.

Properties along Bennett Street aren’t connected to the storm water network, so the water from these properties runs directly onto the ground. Water travelling from Drouin and down Mackey Drain is often the cause of Longwarry flooding in the centre of town.

Flooding from the drain network is caused by a combination of long term rainfall, high soil saturation and the rivers already being full. Longwarry is in a natural floodplain, so it could flood from local drains overtopping their banks from rainfall upstream, with minimal to no rain having fallen in the town itself.

There is no warning system such as flood gauges in the drains, so the best way to prepare for possible flooding is to keep an eye on official forecasts and warnings for the West and South Gippsland weather district.

The maps above shows the impact of a 1% flood in the Longwarry area. A 1% flood means there is a 1% chance of a flood this size happening in any given year.

Are you at risk of flood?

Moe River Flats Flood Guide map
Click to enlarge. 

The Moe River Flats experiences flooding on a frequent basis, with breakouts from the Moe Riveroccurring when the river flows exceed the channel capacity and flooding becomes widespread.

Flood water is unable to return to the drain because of the levees and water levels in the drain being higher than the surrounding land.

During significant flood events, the Moe River can exceed capacity and water can remain for extended periods of time in the Moe Flats area, causing property access issues, and damage to roads and farms.

There are many septic tanks and farm chemicals stored in farm sheds which may be inundated by flood water making it unhygienic or even toxic.

Are you at risk of flood?

 

Trafalgar flood guide map.
Click to enlarge. 

The older parts of the township south of the Princes Highway are largely free from significant flooding, even in larger flood events, with water only pooling in localised lower lying areas.

New development to the east of the township is largely flood proofed by the fill levels and internal drainage layout.

Some of the most significant flooding starts just south of the Princes Highway and stretches from Dodemaides Road through to Ashby Street. It can reach up to 0.8 metres deep. Alto Motors has flooded up to the front door in the past.

Water has broken out of the waterway channel and flowed west along the Princes Highway, eventually flowing over the road around the location of the new wetland feature inside the Strzelecki Views estate. This occurred in the 2012 flood event.

The Princes Highway can also be affected between Yarragon and Trafalgar by runoff from the hills to the south exceeding the capacity of culverted drainage lines on the sides of the road. Lois Court, December 2016.

Run off from the steep hills behind the town can sometimes combine with that from the township, overwhelming the drainage system. In major floods, water flow breakouts over the Princes Highway can occur between Reserve and Seven Mile Roads.

Are you at risk of flood?

 

Warragul flood guide map.
Click to enlarge. 

Warragul is at risk of flooding from sustained rainfall caused when Hazel Creek and SpringCreek reach capacity and overflow their banks into surrounding areas.

Warragul is also at risk of flash flooding from heavy rainfall over a short period of time.

Flooding from Hazel and Spring Creeks typically occurs within about six hours of heavy rainfall and can last around 24 hours.

Warragul’s major risk of flooding comes from heavy rainfall from a storm, causing flash flooding which can overload the town’s storm water system.

When a Severe Weather or Thunderstorm Warning is issued by the Bureau of Meteorology and heavy rainfall is expected in the area, stormwater flooding will occur quickly following the rainfall, typically within 30 minutes if rainfall is more than 20 millimetres per hour.

Many major roads through Warragul are likely to be closed during flooding to avoid further water damage to properties and to ensure the safety of residents. In the past, floods in Warragul have not caused extensive damage to homes.

The main issues are caused by drivers ignoring road closure signs and driving through water affected roads. It is unsafe and unnecessary to drive through roads with water over them.

The map shows roads likely to be closed in a flooding event and highlights that there are plenty of alternative routes available.

About Flood Guides

Communities can use local flood guides to identify and better understand their local flood risk. They include information about: flood history, how to prepare & respond to floods and who to contact.

Contact Information

For more information, contact the East Region Office.
For information on flood warnings, see the VicEmergency website
Visit the Baw Baw Shire Council website.
Your local Catchment Management Authority: Tarago

Local VICSES Units

Warragul VICSES Unit:
160 Queen St,
Warragul, Victoria

Erica VICSES Unit:
1A Lehmann Ct,
Rawson, Victoria

Municipal Flood Emergency Plan (MFEP)

Municipalities can use Municipal Flood Emergency Plans to prepare, respond and recover from flood and storm events.
Baw Baw Shire Flood Emergency Plan.