The company which reported a half yearly underlying EBITDA of $2.7 million compared to the $0.8 million in the previous corresponding period had also improved revenue by 16% to $36.3 million for the six months to June 2015.

Debt reduction has delivered a positive cashflow impact of $500,000 per month.

The company had no material contract work lost and had been awarded most replacement contracts, it said.

“The coal sector downturn is still impacting on hours worked,” Delta SBD said in a result presentation.

“The hours worked are the highest level in 24 months.”

The company now employs 389 full time equivalent workers, up 18% from June 2014.

New and varied Enterprise Agreements secured by the company with its workforce demonstrates employee commitment, it said.

Delta SBD had its contracts at two units of South32’s Appin mine in NSW extended, including secondary support, civils, drill and blast excavation and other mine services activities.

The company also had a contract extended with Peabody’s Metropolitan mine in NSW for secondary support and other mine services activities.