As an example, say a 6 man pipe crew installing some 12' deep underground pipe. I know different utilities/pipe materials might yield slightly different scopes, but I'm looking for a general idea.
I would understand the crew to be made up something of the following:
Foreman
Underground pipe laborer (bottom guy)
Above ground pipe laborer (top guy)
Loader Operator
Excavator Operator (digging)
Excavator Operator (compacting backfill)
What are the general tasks for each laborer above for an open cut trenching operation.