After conducting research, I was unable to find any information about a boat ramp named Benson County located at the given latitude and longitude coordinates in North Dakota. It's possible that the information is outdated or incorrect.

In general, boat ramps are typically either concrete or gravel and come in various widths depending on their intended use. The body of water that a boat ramp services can vary widely, from small lakes and ponds to large bodies of water such as oceans or bays. The types of watercraft permitted on the water can also vary depending on the body of water and local regulations.

Without further information, it's difficult to provide a detailed description of the Benson County boat ramp or the body of water it services.