Union says Origin's Eraring coal deal leaves miners with uncertain future

Myuna colliery workers at a union meeting last month. Image supplied

The mining union says hundreds of workers at Myuna and Mandalong collieries face an uncertain future despite a short-term deal struck between Origin Energy and Centennial to supply coal to Eraring Power Station.

Eraring's owner and Centennial Coal reached a deal on Thursday to extend their existing supply contract for six months beyond its expiry date this month.