Claggett's Mill Bridge, a three-arch bridge over Antietam Creek, was completed by John Weaver in 1840 for $2,800. It stood near the mill operated for generations by the Claggett family, and the house, barn, and outbuildings of the Claggett estate, "Valentia," stand nearby. The bridge is 173 feet long and has spans of 34 feet, 38 feet, and 34 feet.