Unfortunately, I cannot provide the latest information on the boat ramp named Willow Dam Road Town of Little Rice in Mississippi as the given coordinates (latitude: 45.7130394, longitude: -89.84549713) are not in Mississippi. They appear to be in Wisconsin, specifically in the town of Little Rice in Oneida County.

According to the Wisconsin Department of Natural Resources, there is a boat landing named Willow Dam Road Boat Landing in Little Rice, Wisconsin which services Willow Lake, a 246-acre lake known for its fishing and recreational opportunities. The boat landing is described as a concrete ramp with a gravel parking area. The website does not provide information on the width of the ramp or the types of crafts permitted on the water.

Therefore, it is important to verify the accuracy of any information about a specific boat ramp, including location, services, and regulations, before planning a trip.