Peabody averaged 28% margins across its five mining segments.
It may represent the most ground penetrating radar evaluation performed on an Australian longwall.
Three of the mine's five openings remain temporarily sealed to reduce airflow into the mine.
Some workers are assisting with a number of projects to improve local amenities.
The investigation indicated the hardware and software are unique to Joy feeder breakers.
One-off costs associated with the company's Appin restart plan came to US$23 million.
Four new videos have now been produced.
Downer EDI lands another Cobar contract.
AusPac is continuing discussions with other potential mining contractors, and equipment suppliers.
The Longwall 14 was initially approved with conditions, which the department said were met.
The remainder of the seam will be extracted later in the mining sequence to enable maximum recovery.
On July 9 Yancoal announced that 200 Austar employees would be redoployed or stood down.
Grosvenor has become Anglo's top performing Australian coal mine.
The company produced coal at annualised rate of 6Mt in June.
All underground longwall production at Austar remains prohibited by the regulator.
The solution involved increasing the number and capacity of rib shields fitted to bolter miners.
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