Location 5 Located upriver from location 4 this dam was commissioned in 1956.
Commissioned in 1956, the dam, reportedly, had a design life of 50 years, and although it has resource consent for a number of years, decommissioning is inevitable.. The reservoir's sedimentation issue is well-known, but what is not widely known is that, geo-technically, the Gorge has an earthquake faultline close by and landslide areas. A major quake along the Great Alpine Fault is expected in the next 1-20 years. But it is the sediment build-up or aggradation issue that is the immediate problem. Build up of silt will eventually stop the dam from working properly.
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