Pumped Irrigation Service Standards

Pumped Irrigation Service Standards

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The Tresco and Nyah districts are currently part of a GMW project to identify the future service needs of our customers.


As Goulburn-Murray Water (GMW) customers in the Nyah, Tresco and Woorinen districts,you have much in common. GMW recognises that, in rural terms, you are neighbours living in relatively close proximity - many sharing common agricultural pursuits in stone fruit, vegetable and grapes.

GMW provides pumped irrigation services and drainage facilities to all these districts with similar or the same service standards. These similarities have in the past prompted discussion for a common pricing regime across the three districts. This would have added appeal to customers with property in different districts, incurring different service charges.

Nyah, Tresco and Woorinen are, however, significantly different in that they have separate pumps and irrigation infrastructure supporting each district. You, as customers, may share similar needs and have common service concerns yet there is different pricing in place to support the different infrastructure delivering your water.

Woorinen was previously served by an ageing gravity irrigation system. This system was replaced with new pumped infrastructure that has been serving the district for more than 15 years.

The separate pumps and associated infrastructure that serves the Tresco and Nyah irrigation districts were constructed in the 1960s and 70s and are nearing the end of their operating life.

The Tresco and Nyah districts are currently part of a GMW project to identify the future service needs of our customers in these areas. This is to develop a viable,sustainable plan to eventually replace infrastructure in both areas.

GMW thanks its Tresco and Nyah customers who have contributed to this project.

Your input so far has also served to identify Issues with the delivery of current services. We have identified these Issues part of this briefing paper.

Who are our pumped district customers?

The Tresco, Nyah and Woorinen districts comprise 170, 262 and 247 customers respectively. Latest GMW data on your water use across these districts is detailed in the table below:

2017/18 Data

What services do we provide our pumped district customers?

All customers receive two major services from GMW:

- The management of the pumped irrigation schemes delivering water to 679 properties by pipeline;

- The provision of drainage facilities to our customers in the three districts.

How do we measure our performance?

The table below summarises the service standards by which GMW currently measures the performance of our service to pumped district customers.

Questions for our customers

- Are the service standards we currently have(delivery management, supply interruption management and efficiency) relevant?

- Is the provision of these service standards meeting customer needs?

- What services standards might we be missing?

Through our engagement with Nyah and Tresco customers we heard there were three important topics for these customers about pressure, water quality and supply interruption notifications. Because we have heard this we would also like to ask our customers:

1.   PRESSURE: The pipelines serving the Tresco, Nyah and Woorinen systems are currently designed to deliver three metres of head pressure.

Do you consider it important for GMW to monitor and report on system pressure at particular locations within the network?

Is the current minimum level of service (three metres of head pressure) sufficient to meet your service needs?

2.   WATER QUALITY: For some customers, brackish water requires frequent on-farm filtering.  

Is this an important issue for you?

Is improving water quality something that you would be willing to pay for?

Is improving water quality better managed on an individual basis?

3.   SUPPLY INTERRUPTION NOTIFICATIONS: GMW currently notifies customers of supply Interruptions via a text-message to their mobile phone.

Is our current method of notifying customers sufficient?

Would digital mapping of supply interruptions, similar to that employed by power companies or GMW blue-green algae alerts, be of benefit?

What is the most important information you need to receive within what time frame do you need to receive it?

4.   DRAINAGE: Currently all pumped irrigation districts receive a drainage service.

How important is the current drainage network to your operations?

What do you consider would make effective measures(s) of drainage service?