the line of rock was used for years has a bridge and 2 old timers told me that they would fish at the bridge and let there line drift under. they also said that there were carvings all over the floor of the bridge. the library at grayson had some old maps of the county that showed the river going under the bridge with an old iron furnace on the east side. i always felt that the corp of engineers had some other reason for getting rid of it. when the dam was being dug out a huge silver vain was found at 55 feet, this was in a newpaper story from huntington wva. there is an old silver mine about 2 1/2 miles east of the dam. its called silver mine creek.