[Description of the Accident]
This accident
occurred during the work to lift a drain pump through a manhole in a
sewerage construction work.
The work was to replace the pipes for
rain water. As another drain pump became necessary, it was decided to use
the drain pump in another manhole for which work was almost
completed.
Accordingly, two workers opened the cover of the manhole
and entered by using a ladder.
After a short while, a colleague who
was going to the material shed spotted the two workers lying at the bottom
when he looked into the manhole, and raised an alarm with other workers.
One of the workers who ran to the spot entered the manhole and called out
to them, but received no answer. Immediately after this, this worker also
collapsed.
Although the three were taken to a hospital by a rescue
team, the two workers died and the would-be rescuer was hospitalized with
brain damage caused by hypoxia.
The two fatalities were attributed
to anoxia.
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