Christchurch Airport's Tarras project is slowing down. 

The airport had been developing a Central Otago airport on 800 hectares of land in the small town of Tarras. 

It's been put on hold due to the need of co-investment from both public and private sources. 

Queenstown Airport chief executive Glen Sowry told Mike Hosking that the Tarras project hasn't met community demands and expectations as Queenstown Airport has. 

He says they've been working hard on making sure their future plans are what the regional businesses and community wants. 

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