Officially known as the Cilleyville-Bog Bridge, this structure began its tenure named simply Bog Bridge. There was already a Cilleyville Bridge just eight hundred feet away on the Blackwater River, located in an area of Andover named after the Cilley family. When that bridge burned down in 1908, the Bog Bridge became known as the Cilleyville Bridge since it …Officially known as the Cilleyville-Bog Bridge, this structure began its tenure named simply Bog Bridge. There was already a Cilleyville Bridge just eight hundred feet away on the Blackwater River, located in an area of Andover named after the Cilley family. When that bridge burned down in 1908, the Bog Bridge became known as the Cilleyville Bridge since it was the only one left in Cilleyville.