RTK survey of permanent monitoring plots at Altamaha plant transition sites conducted between 2015 and 2025.

Initial real time kinematic (RTK) GPS survey of ground elevations of GCE permanent monitoring plots at the Altamaha plant transition sites ZSC1 and ZSC2 was conducted in January 2013. RTK survey of permanent monitoring plots at Altamaha plant transition site SCSA was conducted in July 2025. Plots that experienced terminal slump or could not be found for any reason were replaced with a new plot in the same general area with the plot code incremented by 10. For example if plot 3 was lost, it was replaced by 13, and then in turn by 23. This data set will be updated as future RTK measurement of the plots are made.