Native title holders say coal seam gas (CSG) companies have desecrated sacred Aboriginal sites near Gladstone in central Queensland.

Santos, QGC and Australia Pacific LNG are each building massive pipelines from the Surat Basin north-east to Gladstone to feed into liquefied natural gas export plants further north-east at Curtis Island.

But the Port Curtis Coral Coast Native Title Group says the companies have destroyed cultural heritage sites and dumped construction spoil on sacred gathering spots.

Group spokesman Nat Minniecon says it is the "ultimate sign of disrespect".

"I suppose the example is if somebody bulldozed down a heritage building, whether that be a post office in Rockhampton or a mosque or a Catholic Church from the early 1900s, that's deemed to have heritage value," he said.

"Why is ours looked at differently?"

Mr Minniecon says one of the gas companies has even dumped construction spoil on an ancient sacred gathering spot near Gladstone.

"Normally what happens is before they go and put a grader or a bulldozer through it, they get our people to check it to see whether or not there's any cultural heritage that might be there," he said.

"In these instances they've neglected to do that and in other instances they've put their spoil on sites near creeks etc that weren't surveyed.

"Yet we know them to be sites where our people used to gather."