316+00_LookingWestSGC believes that one of the best ways to control costs is to have the most accurate plan possible. The preliminary survey is the foundation that the rest of the project is built from. Accuracy matters.  Minor measurement errors pushed out over a long distance may lead to regulatory and trespass issues. Preliminary survey includes gathering geospatial data about the proposed route and the project requirements for data outputs. This includes the establishment on the ground of the proposed route and location of terrain and physical features (both man made and environmental).  The preliminary survey is more than just survey, it is understanding the appropriate horizontal and vertical datum, the standard data libraries and building the foundation for future work on the project.