The boat ramp named Oacoma is located in South Dakota, specifically at latitude 43.80921555 and longitude -99.35799408. It is a concrete boat ramp that is 20 feet wide, providing ample space for boats to launch and dock. The Oacoma boat ramp services the Missouri River, which is a major waterway in South Dakota.

According to the South Dakota Game, Fish and Parks department, the Oacoma boat ramp provides access to a wide range of watercraft, including motorized boats, sailboats, canoes, and kayaks. There are no restrictions on the type of boat that can be launched from this ramp.

The latest information available suggests that the Oacoma boat ramp is well-maintained and offers easy access to the Missouri River for boaters. It is situated in a scenic location and is frequently used by locals and tourists alike.

In conclusion, the Oacoma boat ramp is a concrete ramp that is 20 feet wide and services the Missouri River in South Dakota. It is open to all types of watercraft, including motorized boats, sailboats, canoes, and kayaks, and is well-maintained and easy to access.