The rescue operation began before 8:30 a.m. in the 1411 block of Hobard Boulevard, according to the Los Angeles Fire Department.
As crews evaluated the air-quality inside the trench, the trapped 50-year-old man was secured by a rope system and remained alert before being hoisted out of the hole.
He did not appear to be seriously injured as he walked to a waiting wheelchair and was placed in an ambulance.
DEVELOPING: More details will be added to this report as they become available.