For more than a year, the foundation has been collecting donations for the monument, which is approximately the same size as the McNutt Fountain, also sitting in front of City Hall.
The monument will have a model of Hall's P-40 Warhawk "The Maxine," named after his wife on top. Other additions include a face plate of Hall and a plaque listing the Tuskegee Airman's military accomplishment during World War II also appears on the monument.
Foundation representative Ted Paris told The Brazil Times a decorative slab of concrete was poured for the monument during the final week of June.
Paris added a ceremony is in the works to dedicate the monument but no date has been set.
On July 2, 1943, Hall's squadron provided cover for a formation of B-25 "Mitchell" bombers when more than 20 German fighter planes attacked over Castelvetrano Field, Sicily. Hall, then 22, was the first African-American pilot to shoot down a German Focke-Wulf FW190.
It was his eighth mission and also the unit's first aerial victory against the Luftwaffe.
Following the mission, Hall was awarded the Distinguished Flying Cross.
Upon retiring, he became an insurance agent in Oklahoma City, until he died in 1971.