Singerly firefighters were called to the scene, at 320 Brick Hill Road, Elkton, about 8 a.m. on Tuesday, August 11.
Numerous techniques were employed to rescue Mackie.
Firefighters initially formed an assembly line hauling buckets of corn out of the bin. Several shop vacuums were put to use. The county's public works vacuum was also brought to the scene. Also, a hole was cut into the corn bin to drain the corn from the bin.
Dams - both a manual dam and a mechanical dam - were set up inside the bin. Harford County's Technical Rescue Team was called to the scene. Members of the Shock Trauma's Go-Team were also called to the scene. Go-Team members provide care at casualty scenes.
"This is out of the norm for us. But we have agriculture in the area, This is not something we haven't seen before," said Vic Costa, public information officer for Singerly Fire Company.
Shortly after noon, Mackie was freed from the auger taken out of the corn bin.
"We had a lot of cooperation with the technical rescue team, Cecil County government, and the local farmers who came to help. It was a combined effort," said Singerly Deputy Fire Chief Fred Hill, Jr.
He also said that medical personnel worked to stabilize Mackie, who was alert. Mackie was transported by ambulance to Christiana Hospital in Delaware.
Last month, firefighters took training regarding agricultural rescues during the Cecil County Fair. Firefighters said the skills learned in that class were used during this rescue.