There has been a recent debate at our firm regarding the use of a single drawing that has both existing conditions and proposed conditions. We will then xref that into each sheet of the drawing package. Some feel that we should use multiple xref's....for example; one for existing conditions, one for proposed storm drains, one for proposed water, one for proposed paving, etc. Most of our projects consist of a work area of 10 to 20 acres. I'd like to get an idea of what others in the civil realm think. Your participation in this poll is most appreciated.