6.25.3 Guarding Opened Manholes and Similar Structures
A single crew must not have more than two (2) manholes opened at any one time. Exception: Three (3) may be opened for short durations during outside agency and client inspections. An extra manhole guard should be posted if needed.
An opened manhole not properly barricaded for any reasons (refer to (b), above) must be attended at all times. A manhole is considered unattended if there is no employee above ground within arm’s length of the opened hole keeping persons away from it.
Where several manholes on a jobsite must be accessed periodically throughout a work day, temporary plywood manhole lids may be used to cover those manholes not otherwise barricaded.
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