I'm no fan of Adani and its practices, but that spill occurred under the extreme conditions of a Category 4 Cyclone and 400mm of rain falling in less than 24-hours. The wetlands are also man-made and less then forty years old - however there's substatial wildlife diversity living there. Much was made of this spill, but I doubt any coal handling facility in Australia could have avoided spillage under these conditions. Cyclone Debbie was a monster cyclone that flooded every river between Bowen and Rockhampton, destroyed hundreds of buildings, and is the most powerful storm to ever hit a modern export port facility on the east coast of Australia.As I understand the incident, Adani applied to increase their discharge limit knowing the cyclone would result in an un-containable release of coal slurry, then applied to increase it again, both of which were granted. Adani then breached the amended, increased limit by a factor of 8.
Happy to be corrected, but if they knew they were going to need X, why not apply for X instead of Y, unless they knew if they were truthful they would not have got approval at all? "It's better to ask forgiveness, than for permission..."
The reason you understand the incident the way you do is because you believe the word of the green groups and their supporters in the media.
They like to use emotive terms like "coal slurry" but its just coal dust mixed with a lot of rain water. Notice how there are no stories of the environmental destruction all this "coal slurry" caused? That's because there wasn't any, it was just the same amount of coal dust mixed with a lot more rain water. The size of the fine reflected this fact.
The black after picture you posted is certainly emotive but after a day or two the coal dust will settle to the bottom and it will again be clear. The wetland was created for just this task.
The green groups of course know this but they have an agenda to shut down the coal industry completely so they choose to beat it up.
You should also know that the Labor government up here gives all non essential public servants the day off whenever there is a big rain event. Its quite possible the Adani manager in charge of the pumps had no one from the government he could call to get an increase.