An on-going project for professional electrical engineering services from Hartwig Engineering Inc is the Light of the World Church in Phoenix Arizona. This project was started several years ago, and is presently still under construction. This is a very large and unusual structure. The most recent changes involving electrical engineering design service, architectural and mechanical design services is the elevator change. The client desired to change one elevator in this facility to a more traditional type, which increased the horsepower requirement and changed the location and size of the elevator machine room. This is requiring the consultants to revise the projects plans on several floors, along with revisions to electrical load and wire size calculations. Close coordination is required between all three disciplines to accomplish this task for this facility.