Longest running ferry in US at risk of closing after more than 200 years By: Bo Evans and last updated 2021-01-11 21:14:19-05 POOLESVILLE, Md. â âI work in Virginia, and have always worked in Virginia. The ferry has always been my way into Virginia,â said Karla Berger, a health care worker at a hospital in Virginia. But she lives across the Potomac River, in Poolesville, Maryland. The fastest way for her to get to work is Whiteâs Ferry. âIt is a major transportation link,â said Kerri Cook, the president of the Poolesville Town Council. âSomewhere between 600 and 800 cars a day,â said Cook.