After conducting research, I was unable to find any information on a boat ramp called Copperwood Court in Lincoln County, South Dakota. It is possible that the ramp is a private facility or a local name for a public ramp that is not widely known.

Without additional information, I cannot determine the type or width of the ramp, the body of water it services, or the types of watercraft that are permitted.

If more information becomes available, I would be happy to provide a more comprehensive answer.