This seems to be one of Leydens first situations before the 9th Ga actually went into Confederate Service. The only bridge burning at this time I could find was the Locomative Chase. At this time the 9th hung around Camp Kirkpatrick and Camp Luckie gaurding Atlanta in service of Governor Brown. I was trying to ascertain if this was associated with a battle or like you said just some troop movements. The ORs said Leadbetter burnt his share of bridges too.