According to WJLA, the incident occurred Tuesday morning in the 4600 block of Dexter Street, NW.
Authorities responded to free the man but were unable to save him. His body was recovered the following day.
The man was working on a construction site for a new home when the accident occurred.
Authorities have not determined what caused the trench to collapse. The incident remains under investigation.
The following information was provided by the Occupational Safety and Health Administration (OSHA):