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Home>Water resources>Water storages>Pykes Creek Reservoir
 Location
History
Purpose
Statistics
Recreational facilities
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| Location | | Pykes Creek Reservoir is located on a tributary of the Werribee River, 72 km west of Melbourne on the Western Highway.
Melway reference – Map 611 E1
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| History | | The reservoir was constructed between 1908 and 1911. It was raised by 3.35 metres in 1930. It has a capacity of 22,119 megalitres (ML).
After its initial construction was the reservoir operated for several years but as demand increased, it was decided to increase the capacity. To achieve this, the dam was raised by 3.35m in 1930.
In 1945 the inlet to the outlet tower was raised by 4.7 metres to overcome a siltation problem that was inundating the original inlet.
In 1967, the Western Freeway was constructed to improve travel between Ballarat and Melbourne. These works resulted in part of the dam being buried underneath the Western Freeway embankment. As part of these works the outlet conduit of the dam was extended by about 73 metres to allow it to clear the toe of the highway embankment.
In 1968 the clay core of the embankment was raised by about 1.5 metres up to crest level.
Following the outcomes of a risk assessment study, the left side spillway training wall was raised in 1998 to prevent flows in the spillway chute from overtopping and causing damage to the embankment.
In 2003, major alterations were made to the outlet tower. The old low level inlet was found to be collapsing. This led to the construction of new low level inlet with the old inlet being plugged with concrete. In addition two new inlet valves were installed.
The new arrangement allows the tower to be dewatered for inspection and maintenance. In addition, it allows water to be drawn from closer to the surface, reducing the effects of cold water pollution.
In mid 2005, a dam safety upgrade project commenced with works being carried out at the embankment / spillway junction to reduce the probability of failure due to piping.
In 2009, $5 million remedial works were completed to improve the reservoir’s flood capacity and its defences against erosion through the embankment.
The works will include a filter buttress against the downstream face of the embankment, allowing any seepage to be intercepted and safely drained away. The embankment was raised by 0.8 metres and the spillway widened by 30 metres to improve flood capacity.
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| Purpose | | | The reservoir provides water for use within the Bacchus Marsh and Werribee Irrigation Districts. It also supplies a small amount of drinking water to Myrniong. Water is harvested from within its own catchment and is also supplemented by a diversion weir on the Werribee River and a tunnel through the hills to Myers Creek, which runs into Pykes Creek. Top
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| Statistics |
| RESERVOIR |
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| Capacity |
22,119 ML |
| Dead storage |
1,770 ML |
| Surface area |
203 ha |
| Full supply level |
396.57 AHD |
| Catchment area |
129 km2 |
| EMBANKMENT |
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| Maximum height |
39.8 m |
| Length |
351 m |
| PRIMARY SPILLWAY |
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| Crest length |
91.7 m |
| Discharge capacity |
100,000 ML per day |
| SECONDARY SPILLWAY |
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| Crest length |
29.8 m |
| Discharge capacity |
65,000 ML per day |
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| Recreational facilities |
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| Only boats powered by an internal combustion engine are permitted if the engine has a water-cooled exhaust system, discharging through the transom at or below the waterline.
All of our recreational facilities including Pykes Creek Reservoir have a carry in – out policy, meaning any litter you bring to the recreational reserve must be taken home with you.
Camping, firearms and horses are not permitted. Dogs must be on leads at all times.
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| More information | | If you require further information on Pykes Creek Reservoir please contact 1300 139 510 or send us an email.
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