Under questioning from National MP Chris Tremain, chief strategy officer Bill Luff said the price at which the company's hard coking coal output was sustainable was US$140 - US$150 a tonne.
At present the spot price was about US$119 a tonne although Mr Diack indicated Solid Energy received somewhat more than that under its supply contracts. Mr Luff said while the company expected prices to recover to US$200 a tonne by 2021, there was ``little or no change'' expected over the next 12 to 18 months.
Mr Diack later told reporters that could derail an expected reduction in debt over the next two years and also force the company to draw on as yet unused credit facilities extended by the Government which total $130 million.
Responding to questions from Green MP Catherine Delahunty, Mr Diack confirmed the company had discussed selling West Coast mining operations with the visiting Indian Steel Minister recently.
However he suggested that was not unusual. The company had dealt with Indian interests for more than 20 years and they had "always'' expressed interest in purchasing coking coal mining assets in this country.
Mr Diack said the company was not still in discussions about selling mines to Indian interests, but the matter was a "Government to Government'' issue which was being handled by ministers. He did not know whether those discussions were continuing.