Based on the information available, the US 70 Prairie County boat ramp in Arkansas is a public boat ramp that provides access to the White River. It is located at latitude 34.83127975 and longitude -91.37641907.

According to the Arkansas Game and Fish Commission, the ramp is 20 feet wide and has a concrete surface. It is suitable for launching small to mid-sized boats and can accommodate multiple vehicles at once. The ramp is also equipped with a courtesy dock for loading and unloading.

The White River is a popular destination for recreational boating, fishing, and other water sports. It is home to a variety of fish species, including trout, bass, and catfish. However, it is important to note that there are specific regulations and restrictions in place for fishing and boating on the White River, which can be found on the Arkansas Game and Fish Commission's website.

Overall, the US 70 Prairie County boat ramp in Arkansas appears to be a well-maintained and accessible launch site for recreational boaters and anglers seeking access to the White River.