Upon researching, there is no specific information available regarding a boat ramp named FM 1190 Denton County in Texas. Therefore, it is not possible to discuss its specifications, including what kind of boat ramp it is, how wide it is, what body of water it services, and what kind of watercraft are permitted on the water.

It is important to note that whenever looking for information on a specific boat ramp or any other location or facility, it is always a good idea to refer to reliable sources such as government sites, travel guides, or local tourism offices to ensure accuracy.