The incident happened just after 7pm Friday at a construction site behind an apartment complex on Beechnut near Club Creek.
Witnesses said a group of contractors working on a drainage project came running up to them asking for help.
Houston Fire Department Capt. Ruy Lozano said a slough around a trench pushed a pipe, pinning one worker and burying another under as much as three tons of soil. The construction area is about 12 feet deep and 8 feet wide.
Witnesses said they grabbed shovels and tried to rescue the workers before firefighters arrived.
Firefighters rescued a 28-year-old worker and rushed him to Herrmann Hospital in Medical Center. Rescuers still are working on retrieving the body of the second worker, who is around 30 years old.
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