I work for an Electric Utility co-op and we don't do any digging or duct installation. It is largely due to our size (210,000 members) and the fact that we are in a rapidly growing area, but it is much cheaper and more time effective for us to provide specs and inspections and put that work on the contractor/developer/homeowner. Obviously, we do all the tie ins to energized equipment, but that's it. Also, this gives the flexibility for you to run your ditches whenever it suits you.
For even the Son of man came not to be served, but to serve.