Based on the available information, the boat ramp named Northwest Lake Drive 116 is located in Hamlin County, South Dakota, with the latitude and longitude coordinates of 44.59289169 and -97.07364655, respectively. It is unclear what kind of boat ramp it is, but based on its name, it is likely a public boat ramp accessible to the public.

It is also unclear how wide the boat ramp is, as there is no specific information available regarding its size. However, boat ramps typically have a standard width of 20-30 feet, depending on the size of the body of water they service.

The boat ramp services a body of water called Northwest Lake, which is likely located near the ramp. Northwest Lake is a small to medium-sized body of water that may or may not be open to the public. It is unclear what kind of craft are permitted on the water, but it is likely that the lake allows for small boats and watercraft such as canoes, kayaks, and fishing boats.

It is important to note that this information is based on the limited available data, and it is always recommended to verify the accuracy of any information with local authorities or relevant sources before planning a boating trip.