Benchmark Info

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The County of Mathews has created this page to assist Surveyors, Engineers, RDP’s, Contractors and all interested parties.


The County has a number of documents to assist with horizontal and vertical datum.


Note: the current FEMA Flood Insurance Rate Maps (FIRMs) are based on the 1988NAVD.


In addition to the documents below, the following link can be used for NOAA NGS info:


Benchmark map (this map is not an all inclusive map)

1997 Benchmark data

1999 Benchmark data

2002 Benchmark data