The descriptions of the ERM locations appear in different places, depending on the format of the flood map, as seen in the table below.

Marks included on many FIRMs are temporary in nature and may not be recoverable. To obtain current elevation, description, and/or location information for other bench marks for the FIRM, you can use the National Geodetic Survey Data Explorer available at https://www.ngs.noaa.gov/NGSDataExplorer/ or you may contact the Information Service Branch of the National Geodetic Survey at http://www.ngs.noaa.gov or by telephone at 301-713-3242.