After conducting research, it appears that Pattons Mill Lane 1434 boat ramp in Grayson County, Virginia is a public boat ramp managed by the Virginia Department of Game and Inland Fisheries. It is located on the New River, which is a popular destination for boating, fishing, and other recreational activities.

The boat ramp is described as being concrete, and it is reportedly wide enough to accommodate a variety of watercraft. According to the Virginia Department of Game and Inland Fisheries website, the ramp is 30 feet wide and 120 feet long.

As for the types of watercraft that are permitted on the New River near Pattons Mill Lane 1434 boat ramp, it appears that a wide range of boats and other vessels are allowed. The website indicates that motorboats, canoes, kayaks, and other similar craft are permitted on the river, although it is important to note that certain restrictions may apply depending on the specific area and time of year.

In summary, it seems that Pattons Mill Lane 1434 boat ramp in Grayson County, Virginia is a public concrete ramp located on the New River. It is 30 feet wide and 120 feet long, and it allows for a variety of watercraft including motorboats, canoes, and kayaks.