According to the latest available information, the Carpenter Bridge Road 2308 boat ramp in Columbia, Tennessee is a concrete boat ramp that is approximately 20 feet wide. It services the Duck River, which is a major waterway in the state and a popular destination for boating and fishing. The ramp is suitable for launching small to medium-sized boats, such as fishing boats, kayaks, and canoes. However, larger boats may have difficulty maneuvering due to the relatively narrow width of the ramp. It is important to note that regulations and restrictions on watercraft use can change, so it is always best to check with local authorities for the most up-to-date information.