I am using ArcMap 10.2.1.
I have displayed some contours from a DEM and right clicked on the contour layer to select Export Data. The USGS NED metadata states the data coordinate is NAD83, vertical datum is NAVD88 and the Altitude distance units are Meters. The ArcMap data frame coordinates are set to NAD83, South Carolina, International Feet. In the export dialog I select "Use the same coordinate system as: the data frame," and select the output location and shape file format. However, when I import the contours into CAD the horizontal location of the contours appears correct but the elevation of the contours appears to be in meters. What is the best way to export the contours so they have the correct coordinate and units?