Southern Rural Water - Blue Rock Lake
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 Page Last Updated:
 Sunday, 27 March 2016

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Blue Rock Lake  Printer Friendly   
 Why does a storage sometimes show as more than 100% full?
 Power generation
 Public notices
 Other pages of interest

The Blue Rock Dam and Lake are located on the Tanjil River in West Gippsland - VicRoads Reference Map 97 E3

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The reservoir's construction began in 1979 and was complete in 1984. It has a capacity of 208,000 megalitres (ML).

Following construction of the dam, the safe yield of the Latrobe River system upstream of the Morwell River Junction was increased to 325,000 megalitres per annum.

The embankment of the dam is constructed from earth and rock fill material.

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With its rich reserves of brown coal, the Latrobe Valley generates 85% of Victoria’s electrical power and continues to be a vital base for the State’s economic growth. To meet the planned industrial expansion in the region, an assured supply of water is essential to meet industrial, private irrigation and domestic water requirements.

The Latrobe Valley electricity generating companies are able to extract 150,000 megalitres per annum of yield from Blue Rock, for use as cooling water in existing power stations and for future power generation expansion.

Gippsland Water, which is the urban water corporation for the Latrobe Valley, is able to draw 14,000 megalitres annually from Blue Rock to supplement Moondarra Reservoir.

Gippsland Water also pumps water from the Tanjil River to the township of Moe.

Water drawn from the storage is available to maintain minimum flows in the Latrobe River during periods of naturally low flows as required by the State Environment Protection Policy.

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Capacity   208,190 ML    
Dead storage   1,000 ML    
Surface area   873 ha    
Full supply level   140m AHD    
Catchment area   360 km2    
Maximum height   72 m    
Length (excluding spillway)   600 m    
Crest length   41.5 m    
Discharge capacity   100,000 ML per day    

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Why does a storage sometimes show as more than 100% full?
Sometimes our storages show as a little bit more than 100% full.

This happens when the reservoir is already 100% full, and water flows into the reservoir faster than it is being released. The dam cannot permanently retain this additional water as it is above the spilling point, but temporarily ponds it until water flowing in slows to a point where releases are higher, and the reservoir returns to a normal level.

During this period, the storage shows as slightly more than 100% full.

All of our dams have been designed to cope with this temporary ponding.

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Power generation
In1992 Pacific Energy installed a small hydroelectric generator at Blue Rock Lake that gives a total capacity of 2.4 megawatts of power into the state network.

For more information please visit Pacific Energy .

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Public notices
There are currently no public notices.

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Other pages of interest
 Storage levels
 Fact sheet - SRW's role during floods in the Latrobe System

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