Just posted recently by the ATC on their website and Facebook page:
The Goodloe E. Byron Memorial Footbridge (where the A.T. crosses the Potomac River in Harpers Ferry, W.Va.) is closed until further noticed due to flooding. We'll post another update as soon as the bridge reopens.(3/11/11)The FB page has a photo where you can see how high the Potomac is rising. Guess there's more repair work coming up for the C&O Canal towpath.