After conducting research, I was unable to find any information regarding a boat ramp specifically named "Rooks County" in Kansas. It is possible that the information provided is inaccurate or outdated. However, I can provide general information about boat ramps in Kansas.

Boat ramps in Kansas can vary in size and type, from small, single-lane ramps to larger, multi-lane ramps with amenities such as parking, restrooms, and picnic areas. They provide access to various bodies of water, including lakes, rivers, and reservoirs.

The size and type of boat ramp can determine the types of watercraft that are permitted on the water. Some ramps may only accommodate small boats, while others may be able to handle larger boats and even jet skis. It is important to check with local authorities or the Kansas Department of Wildlife, Parks and Tourism to determine what types of watercraft are allowed on a particular body of water.

In summary, without specific information about the boat ramp named Rooks County, it is difficult to provide accurate details about its size, location, and permitted watercraft. It is important to research and verify information before relying on it for planning a boating trip.