Whitehaven has lowered the company's 2020-21 production guidance to 20.4Mt.
Narrabri Stage 3 is a significant life extension and optimisation that needs a site re-approval.
The company said it had ample reserves of cash with $6.8 million on its books as at June 30 2020.
The scope includes the design and construction of the ventilation shaft.
A fall of ground at Moranbah delayed the completion of a longwall move.
The focus of everyone was changed to emphasise the value adding operations.
Metallurgical coal production guidance for 2020 is unchanged at 21-23Mt.
Its vision is to ensure all Australians have access to quality medical specialist service.
Myuna's bracket system removes the need for miners to install anything above their heads.
Aiming to break into the Australian mining market after success in South America.
Macmines continues to hold an exploration permit for coal and a mineral development licence.
The company is focused on achieving a substantial uplift in development rates at Appin.