Based on the latest information available, the Spillway Road boat ramp in Union Parish, Louisiana is a public boat ramp that provides access to Lake D'Arbonne. It is a concrete boat ramp that is approximately 30 feet wide, which should accommodate most types of watercraft.

Lake D'Arbonne is a popular destination for fishing, boating, and other water activities, and the Spillway Road boat ramp is a convenient access point for visitors to the area. According to the Louisiana Department of Wildlife and Fisheries, the lake is open to all types of boats, including motorized boats, canoes, and kayaks. However, there are restrictions on the use of certain types of watercraft in certain areas of the lake, so visitors should check with local authorities for more information on specific regulations.

Overall, the Spillway Road boat ramp appears to be a well-maintained and reliable access point for those looking to enjoy Lake D'Arbonne and the surrounding areas.