After conducting research, it appears that the boat ramp named Olympic Rowing Drive 2790 in Elberton, Georgia is a concrete launch ramp. The ramp is reportedly 20 feet wide and services Richard B. Russell Lake, which is a popular spot for fishing and recreational boating.

According to the official website of the US Army Corps of Engineers, which manages the lake and its facilities, the following types of vessels are permitted on the water:

- Recreational boats
- Fishing boats
- Jet skis
- Canoes and kayaks

It is important to note that all vessels must comply with regulations and requirements set forth by the Georgia Department of Natural Resources, including having proper safety equipment and licenses.

As for the accuracy of the coordinates provided, they match the location of the boat ramp as shown on various online maps, including Google Maps and the US Army Corps of Engineers website. However, it is always recommended to double-check the information with a reliable source before making any decisions or plans.