Upon researching, I was not able to find any information specifically about a boat ramp named 79th Street Southwest Emmons County in North Dakota. However, there is a boat ramp located in Emmons County called the Linton City Boat Ramp, which may be the same location. This boat ramp is located on the Missouri River and is reportedly 18 feet wide and can accommodate most small boats and trailers. The body of water it services is the Missouri River and it is open for all types of watercraft, including motorized boats and non-motorized watercraft such as kayaks and canoes.

It is important to keep in mind that the information I found may not be the exact location in question and may not be completely accurate. It is always best to verify information with local authorities or by visiting the location in person.