This material provides guidance on the required geodetic reference datums and coordinate systems for USACE navigation and flood control projects. General guidance is also provided on setting survey control for dredging projects and positioning aids to navigation in these projects. The major emphasis in this chapter is on vertical reference datums for navigation projects–tidal, river, lake, pool, and flood control reservoirs. This material has minimal coverage of horizontal coordinate systems, horizontal datums, and control survey methods since this material is fully covered in other engineer manuals listed in Appendix A. In addition, nearly all hydrographic surveys and dredge positioning are now controlled by established, nationwide DGPS networks; thus reducing the need to establish supplemental horizontal control on dredging and navigation projects (from U.S. Army Corps of Engineers).
- Horizontal and vertical control for navigation and flood control projects
- Tides, tide stations and tidal datums
- Equipment and field work associated with operating tide stations
- Water level reference planes and systems
Professional Development Hours: 4