Overview – WA HMMS Scheme

The Harvest Mass Management Scheme (HMMS) is a scheme implemented by the West Australian Government and Main Roads WA. It allows for the weight variances that come from ‘off paddock’ loading and acknowledges the difficulties faced with loading techniques.

To help with the difficulties of loading from the paddock, a tolerance of up to 10% is given to registered operators outside of the VRL (capped at 10 tonnes) and within the designated harvest period.

Within the Scheme there is a limit of five non-compliance strikes across ALL approved grain receivers (not just Bunge) before the vehicle loses its tolerance entitlement. In addition to this, if Main Roads WA finds that greater than 20% of a truck’s deliveries were more than 7% above the legal limit they may exclude that vehicle from the Scheme the next year.

Bunge Grain Services is a registered grain receiver within the scheme, and can accept HMMS loads within all of its receival sites, however all transport operators must register their vehicles before delivery at the start of each harvest period.

It is also a requirement by Main Roads WA that every vehicle must carry a copy of the Special Government Gazette and a Bunge Grain Delivery Document (GDD) at all times to be included in the scheme.

Further information on the Harvest Mass Management Scheme can be found HERE:

Truck Registration

To participate in the Harvest Management Scheme, operators must register their vehicles with Bunge. Download the form HERE:

Load Forfeiture Approval

The Harvest Mass Management Scheme (HMMS) allows for a tolerance of up to 10% of the total vehicles VRL, however any vehicle that exceeds this limit will be deemed as overloaded and the details of the vehicle recorded with Main Roads WA.

The transporter has the option to either leave site and correct his load or forfeit the overloaded tonnes.
Note: If a vehicle leaves site when overloaded, they will be lose the 10% tolerance of the HMMS and will be operating on the road under the VRL.

Under the Chain of Responsibility legislation, the drivers of the vehicle (growers representative) can forfeit the overloaded grain on behalf of the grower by signing the forfeiture section of the Grain Delivery Document (GDD).

All forfeited grain is sold by Bunge at the end of the harvest period and the money received is donated to a charitable organisation. For more details please see HERE:

Grain Delivery Document

Any grain delivered to a Bunge site must be accompanied by a completed Grain Delivery Document (GDD).

A Grain Delivery Document (GDD) is a legal document which provides Bunge with important information needed to correctly grade and store loads as well identifying the correct grower information, carrier information and treatment information.

Grain Delivery Documents (GDD) can be obtained from each site or by ordering from WA Logistics.

Note: Grain Delivery Documents from other receivers will not be accepted.

For an example of a correct example, please see HERE:

Mass Limits

To ensure your vehicle is loaded to the correct mass limits before delivery, please follow the Mass Limit Chart, outlining the mass limits for various combinations and schemes: