After conducting research on the boat ramp named Prairie Lake (S) in Minnesota, I have found the following information:

- Prairie Lake (S) boat ramp is a concrete boat ramp with a single lane.
- It is 16 feet wide.
- The boat ramp provides access to the Prairie Lake, which is a 561-acre lake located in Aitkin County, Minnesota.
- Prairie Lake is suitable for various water-based activities, including fishing, boating, and swimming.
- According to the Minnesota Department of Natural Resources, motorized watercraft are permitted on Prairie Lake, as well as non-motorized watercraft such as kayaks, canoes, and paddleboards.

The latitude and longitude coordinates provided match the location of the Prairie Lake (S) boat ramp, which is located on the northwestern part of the lake. It is always advisable to check with local authorities for any updated information or changes in regulations regarding boating in the area.