Based on the latest information available, the boat ramp named Spillway Marina Road in Pottawatomie County, Kansas is a concrete ramp that provides access to the Tuttle Creek Reservoir. It is approximately 12 feet wide, which makes it suitable for launching small to medium-sized boats.

As for the body of water it services, Tuttle Creek Reservoir is a large lake spanning over 12,500 acres, located in the northeastern part of Kansas. The reservoir is managed by the US Army Corps of Engineers and is popular for fishing, boating, swimming, and camping.

Regarding the kind of craft permitted on the water, Tuttle Creek Reservoir allows motorized boats, sailboats, canoes, kayaks, and any other watercraft that is properly registered and compliant with state laws and regulations. However, there are some restrictions in place, such as no wake zones, speed limits, and boating safety requirements.

In summary, the Spillway Marina Road boat ramp in Pottawatomie County, Kansas is a concrete ramp that provides access to the Tuttle Creek Reservoir. It is suitable for small to medium-sized boats and allows various types of watercraft, including motorized boats, sailboats, canoes, and kayaks.