Based on the latest available information, the boat ramp named State Highway RB Polk County in Missouri is located at latitude 37.79562378 and longitude -93.37480927. The boat ramp is a concrete ramp that has been recently renovated and is in good condition. It is suitable for launching small to medium-sized watercraft, such as fishing boats, pontoon boats, kayaks, and canoes. The ramp is approximately 12 feet wide, which can accommodate one boat at a time.

This boat ramp services the Pomme de Terre Lake, which is located in Polk County, Missouri. This lake covers an area of approximately 7,820 acres of water and has a maximum depth of 85 feet. The lake is stocked with various fish species, including bass, catfish, walleye, and crappie, making it a popular spot for fishing.

The Missouri Department of Conservation regulates boating activities on Pomme de Terre Lake. All types of watercraft are permitted on the lake, including motorized boats, sailboats, and personal watercraft. However, boaters are required to comply with the Missouri boating laws, including having the necessary safety equipment and following the speed limits and no-wake zones.

In summary, the State Highway RB Polk County boat ramp in Missouri is a concrete ramp suitable for launching small to medium-sized watercraft. It services the Pomme de Terre Lake and allows for various types of boats, including motorized boats and personal watercraft. Boaters must comply with Missouri boating laws and regulations to ensure a safe and enjoyable experience on the water.