Loddon Valley Irrigation Area delivery system map

We have developed a simplified map of the Loddon Valley Irrigation Area delivery system. This map shows the capacity of channels and regulators downstream of Waranga Basin and along the Loddon River.

Loddon Valley Irrigation Area delivery system map - July 2025

Map context

Channel from Waranga Basin to Loddon River

  • Capacity decreases from 3200 ML/d to about 550 ML/d at Loddon River.
  • Maximum flow into Loddon Valley Irrigation Area is 2000 ML/d at RO858 (95 Mile Regulator) – not all this water is available for delivery as some will be needed to meet evaporation, leakage and seepage.
  • There are 1960 ML/d of delivery shares downstream of the RO858 Regulator (1250 ML/d in Pyramid Hill and 710 ML/d in Boort).
  • The Boort delivery share of 710 ML/d is more than the capacity of the Waranga Western Channel at the eastern side of Loddon Weir.

Waranga Western Channel downstream of Loddon River

  • The Waranga Western Channel downstream of the river has a capacity of 1200 ML/d at the top and this decreases to 150ML/d towards the end of the channel. Again, note some water will be needed for evaporation, leakage and seepage losses.
  • The Boort delivery system (LVIA west of Loddon River) is large enough to meet demand of all Boort delivery share holders.
  • However, the ability to meet the demand is heavily dependent on water from the Loddon storages (Cairn Curran and Tullaroop) - known as the Loddon Supplement.

What causes rationing

  • When there is little or no Loddon Supplement and demand is high, Loddon River water can not be used to meet Goulburn water allocations. Deliveries in the Boort system must come only from Waranga Basin via the Waranga Western Channel.
  • This can lead to the rationing of demand (ie. when demand has outstripped supply) for Boort and Pyramid Hill customers in order to share available water.

Download a PDF version of the Loddon Valley Irrigation Area delivery system map

Please note:  The flow capacities listed are indicative maximums only. Actual delivery capability may vary due to operational requirements, channel conditions, system losses (including evaporation, leakage and seepage), and the availability of Loddon Supplement water.