According to the latest information available, the boat ramp named Rocky Creek Park Road in Tarrant County, Texas is a concrete boat ramp. It is approximately 24 feet wide, allowing for easy launching and retrieval of boats. It services the Benbrook Lake, which is a reservoir located southwest of Fort Worth in Tarrant County. The lake is popular for boating, fishing, and other recreational activities.

As for the kinds of craft permitted on the water, Benbrook Lake allows for a variety of boats, including motorized and non-motorized boats such as kayaks, canoes, jet skis, and sailboats. However, there may be specific restrictions on the use of certain types of boats or watercraft, and it is recommended to check with local authorities or the park office for any rules or regulations.

In summary, the boat ramp named Rocky Creek Park Road in Tarrant County, Texas is a concrete ramp that is approximately 24 feet wide. It services the Benbrook Lake, which allows for a variety of boats and watercraft.