24 January 2008

South East Queensland Dam Storage and Features

SOUTH EAST QUEENSLAND WATER CORPORATION LTD
KEY FEATURES OF DAMS AND STORAGES
Wivenhoe Dam
Somerset Dam
North Pine Dam
Catchment Area (sq km
5,554
1,503
348
Capacity – Water Supply (ML)
1,165,000
380,000
215,000
Capacity – Flood Storage (ML)
1,450,000
524,000
N/A
Submerged Area (ha) at Full Supply Level
10,940
3,967
2,121
Stream Bed Level at Structure (AHD)
23.0
60.4
4.3
Full Supply Level (AHD)
67.0
99.0
39.63
Spillway Level (AHD)
57.0
100.45
32.01
Embankment or Crest Level (AHD)
79.0
107.45
43.2
Type of Structure
Embankment - 4 million m3
Concrete 140,000 m3
Concrete 203,000 m3
Embankment 275,000 m3
Concrete 175,000 m3
Year of Completion
1985
1959
1976
Design
Water Resources Commission
Bureau of Industry Stanley River Works Board
Department of Local Government
Length of Wall (m)
2,300
305
1,375
Shoreline (km)
462
237
166
Spillway Gates
5 of 12.0m x 16.6m
8 of 7.97m x 7.01m
5 of 12.2m x 8.3m
Sluice Gates
N/A
8 of7.97m x 7.01m
N/A
Regulator Valves
2 of 1.5m diameter
4 of 2.3m diameter
2 of 1.4m diameter
Average Evaporation (mm/year)
1,872
1,775
1,375
Average Rainfall (mm/year)
940
1,230
1,175
Average Water Supply Yield (ML/year)
With 1% risk of depletion
Currently Under Review
54,750
SEQWater’s Allocation
345,000 Megalitres
Hydro Electric Station/dam structure
4.5 megawatts
4 megawatts
N/A
Major Water Supply Customers at 30/6/04
Cities of Brisbane, Ipswich , Logan, Gold Coast,
Shires of Beaudesert, Esk, Gatton, Laidley, Kilcoy and Nanango, Tarong Energy, CS Energy
Cities of Redcliffe & Brisbane
Shires of Pine Rivers & Caboolture G:\MW\Brochures\Key Features 2005
G:\MW\Brochures\Key Features 2005