that's right here at shepherdstown but probably most important he likes antietam right over there because he's got a little army and he can't defend that whole area. he knows that antietam creek is going to be a barrier to the yankees from attacking him and salem creek is an interesting place. most people seem to think that it just is around the area of sharpsburg actually, it's very, very extensive. it's 42 miles in length now. i live in pennsylvania right north of monarto and have a branch of the antietam right. it goes all the way by hagerstown, waynesboro, hagerstown. eventually it empty into the potomac river, not very deep, only about three feet deep in some places. indian term, swiftly flowing water. and we're going to talk about these bridges. there are six that were that were built up to 1832. and then there a variety after w're mainly going to be concerned with the ones that were built around the time of the 1830s, 1820s. oak well i don't have to talk about this guy, right. we know venerable, but the thing that is so interesting to me about robert e lee in the army here, the arm