Based on the latest information available, the boat ramp named Road 10 Southeast Grant County in Washington is a concrete boat ramp that is 20 feet wide. It services the Potholes Reservoir, which is a popular destination for boating and fishing. The reservoir is known for its large mouth bass, rainbow trout, and walleye.

The Washington Department of Fish and Wildlife states that all types of watercraft are permitted on Potholes Reservoir, including motorized and non-motorized boats, as well as personal watercraft such as jet skis. However, it is important to note that there are specific regulations in place regarding boating on the reservoir, such as speed limits and wake restrictions. These regulations are in place to ensure the safety of everyone using the reservoir and to protect the environment.

In summary, the Road 10 Southeast Grant County boat ramp in Washington is a 20-foot-wide concrete ramp that services the Potholes Reservoir, and all types of watercraft are permitted on the reservoir, subject to specific regulations.