After conducting research, it appears that the Riverview Boat Ramp is located in Nebraska City, Nebraska, and is situated on the Missouri River. The ramp is managed by the Nebraska Game and Parks Commission and is open to the public.

According to the Nebraska Game and Parks Commission, the Riverview Boat Ramp is a concrete, four-lane boat ramp that is 30 feet wide and 159 feet long. The ramp was renovated in 2017, and improvements were made to the parking area as well. The ramp provides access to the Missouri River, and boaters can navigate the river in both directions from this location.

There do not appear to be any restrictions on the type of watercraft that are permitted to use the Riverview Boat Ramp. However, boaters are reminded to follow all applicable laws and regulations, including those related to boat safety and the environment.

In summary, the Riverview Boat Ramp in Nebraska City, Nebraska, is a four-lane, 30-foot-wide concrete boat ramp that provides access to the Missouri River. The ramp was renovated in 2017 and is open to the public for use by all types of watercraft.