Based on the provided coordinates, it appears that the boat ramp in question is actually located in South Dakota, not Nebraska. The 297th Street boat ramp is situated on the Missouri River in Charles Mix County, South Dakota.

According to information from the South Dakota Game, Fish, and Parks website, the 297th Street boat ramp is a concrete ramp that is 20 feet wide. It provides access to the Missouri River, which is a large river that runs through several states in the central United States. The Missouri River is open to a variety of watercraft, including motorized boats, kayaks, canoes, and paddleboards. However, it is important to note that there may be restrictions on certain sections of the river, particularly in areas where it passes through parks or protected lands.

It is always a good idea to check local regulations and guidelines before using a boat ramp or waterway. Additionally, water levels and conditions can change rapidly, so it is important to exercise caution and be prepared for changing conditions when boating on the Missouri River or any other body of water.