Mike Futrell has put together an updated database report for the April 2023 VSS Meeting.  The report includes every known cave and "karst features" from every county containing a reported cave in the Commonwealth of Virginia. 

Total Number of Caves >5':    4,137
Total Surveyed Passage:        590.88 miles 
Longest Surveyed Cave:         154,440 ft (29.3 miles)
Deepest Surveyed Cave:         1263 feet 

Here's a link to the Full Report