Rhe federal government granted the company an extension to register binding covenants.
Higher-energy, lower-impurity coals are strongly aligned to environmental reforms.
In 2020, there are 64 young men across years 7 to 12 participating in the program at Narrabri High.
More than 75% of written submissions supported the project.
A daytime noise level of 39Db, recorded at a local property, breached the licenced limit of 35Db.
The company has allocated between $50-$58 million this financial year for expansion capital.
The notice indicates EPA was aware of problems last year.
Whitehaven continues to work on a range of measures to underpin water security.
Net profit after tax was down 91% at $27.4 million.
The upgrade supports the mine's ramp-up to its newly approved production rate of 3Mtpa.
Miner understood to be investigating landholders' claims.
This extension accesses 80-100 million tonnes of coal using the established infrastructure.