According to the latest information available, the River Forge Road 485 boat ramp in Manchester, Tennessee is a concrete boat ramp that is 16 feet wide. It services the Duck River, which is a popular spot for kayaking, canoeing, fishing, and other recreational water activities. The Duck River is the longest river located entirely within the state of Tennessee, and it is known for its diverse wildlife and scenic beauty.

As far as the type of craft permitted on the water, it appears that the Duck River is open to a variety of watercraft, including canoes, kayaks, paddleboards, and motorized boats. However, it is always a good idea to check with local authorities to verify any specific regulations or restrictions that may apply.

In summary, the River Forge Road 485 boat ramp in Manchester, Tennessee is a concrete ramp that services the Duck River, which is open to a variety of watercraft for recreational use.