According to the latest information available, the boat ramp named Riverview Park is located in Lancaster County, Pennsylvania, at a latitude of 40.05875397 and a longitude of -76.61148071. It is a public boat ramp that provides access to the Susquehanna River, which is the largest river on the East Coast of the United States that drains into the Atlantic Ocean.

The boat ramp is approximately 30 feet wide, which is wide enough to accommodate most small and medium-sized watercraft. It is a concrete ramp with a gentle slope that makes it easy to launch and retrieve boats. The ramp also has a parking area adjacent to it, which can accommodate cars and trailers.

As for the types of boats permitted on the water, there are no specific restrictions mentioned on the official website for the park. However, it is important to note that the Susquehanna River is notorious for its unpredictable water levels and fast currents, especially during periods of heavy rainfall. Therefore, it is recommended that boaters exercise caution and adhere to all safety regulations.

In summary, the Riverview Park boat ramp in Pennsylvania is a public concrete ramp that is approximately 30 feet wide. It provides access to the Susquehanna River and is suitable for most small and medium-sized watercraft. Boaters are advised to exercise caution due to the unpredictable water levels and fast currents of the river.