Complex sentence: The present town was built in 1968 as a greenfields project to service the Upper Waitaki Hydroelectricity Scheme, and at the height of the project in the 1970s, had a population peaked of around 6,000.
Split into simpler sentences: The present town was built in 1968 as a greenfields project to service the Upper Waitaki Hydroelectricity Scheme. At the height of the project in the 1970s, had a population peaked of around 6,000.