looks fine to me, although I haven't seen it done that way before. The poco's I work w/ require U/G temp service pole to be used if the building has an U/G service, and vice-versa for O/H services. I work w/ 3 poco's that require the service laterals to be in conduit and its the contractors responsibility to do it; in that case, we have to run the conduit for the service, and then a separate line has to be trenched for the temp pole. When they hook up the building service, we have to dig up the temp service line.