After conducting research, I was unable to find any specific information regarding a boat ramp named Riverfront Reg. Park Launch in Minnesota. It is possible that the name may be incorrect or outdated.

However, I can provide information regarding the typical specifications of boat ramps in Minnesota. Most public boat ramps in Minnesota are made of concrete and are typically between 10-20 feet wide. They are designed to launch a variety of watercraft, including motorboats, canoes, kayaks, and sailboats.

The body of water that a boat ramp services can vary, as Minnesota has over 11,000 lakes and numerous rivers and streams. It is important to note that certain lakes and bodies of water may have specific regulations or restrictions on the types of watercraft allowed or the hours of operation for boat ramps.

To obtain accurate and up-to-date information on a specific boat ramp in Minnesota, I would recommend contacting the local park or recreation department, or checking the Minnesota Department of Natural Resources website.