SOUTH PORTLAND — The memorial for the state’s deadliest air disaster will be installed Thursday.

On July 11, 1944, Army Air Corps Lt. Philip “Phee” Russell crashed his twin-engine light-attack bomber into a trailer camp in the Long Creek area. Russell and 18 others died in the crash and explosion that followed.

The memorial will be erected near the crash site, by the entrance of Redbank Village.

City officials and a survivor of the accident are expected to attend the groundbreaking at 11 a.m. Thursday.

The formal dedication will be held at 2 p.m. on July 11.