The company's Red Bend, Wirrinya and Parkes sites all saw records tumble as the incredible 2020 harvest came in.

Red Bend's biggest intake had previously been 147,000 tonnes in 2015/16 and Wirrinya's 52,000 tonnes in 2011/12. This year, Wirrinya had to close at 67,000 tonnes.

"In almost 25 years working with GrainCorp, the 2020/21 harvest season was by far the biggest harvest I've seen and it was great to see growers coming in after a few years of drought," Mr Gallagher said.

"While we couldn't take everything from growers in the area at the peak of harvest, we're outloading as much grain as possible now to accommodate the on-farm receivals still trickling in and to be ready for the next season."

Mr Gallagher said the region had had a really good harvest season despite the challenges presented, at times, by high temperatures and winds.

All eight bunkers at Red Bend filled, with Red Bend and Parkes silos receiving an average 12,000 tonnes a day.

"In all, total grain receivals at (Parkes) reached over 260,000 tonnes - breaking our previous receival record of 248,000 tonnes during the 2010/11 harvest season," Mr Gallagher said.

"Even now, we're still seeing grain trickling in from late harvest activity and on-farm storage.

"With our nearby Wirrinya site filling and closing, and road trains bringing in grain from areas north of Trundle, west of Condobolin and south of Forbes, we arranged additional bunker storage at Parkes.

"We also started moving grain via rail from Parkes from November and Red Bend from December to help outload as much grain coming into the system as possible.

"Currently, we're loading several export and domestic trains from both sites a week, in addition to some road outloading from Parkes."