There is some confusion in the question as it mentions Yalobusha County in Illinois, but Yalobusha County is actually located in Mississippi. Therefore, the information provided may be incorrect.

Assuming that the correct county is being referred to, there is no information available on a boat ramp named County Road 189 in Yalobusha County, Mississippi. Additionally, Illinois is a state located far from Mississippi and the question appears to be confusing two different locations.

Therefore, it is not possible to determine what kind of boat ramp it is, how wide it is, what body of water it services, and what kind of craft are permitted on the water.