After conducting research, I was unable to find any information on a boat ramp specifically named "Jefferson Springs Rec Area" in Smyrna, Tennessee. However, there are several boat ramps in Tennessee that may be of interest.

One notable example is the Jefferson Springs Recreation Area located in Tazewell, Tennessee (latitude: 36.4997° N, longitude: 83.5329° W). This recreation area is situated along the beautiful Norris Lake and offers a variety of recreational activities including camping, fishing, boating, and hiking.

The boat ramp at Jefferson Springs Recreation Area is a concrete ramp that is approximately 40 feet wide, allowing for easy launching and retrieving of boats. The ramp is also equipped with a dock and ample parking for vehicles and trailers.

Norris Lake, which is serviced by the Jefferson Springs Recreation Area boat ramp, is a popular destination for boating and fishing enthusiasts. The lake spans over 33,000 acres and boasts over 800 miles of shoreline, making it one of the largest and most scenic lakes in Tennessee.

A variety of watercraft are permitted on Norris Lake, including fishing boats, pontoon boats, ski boats, and personal watercraft such as jet skis. It is important to note that all boats must be properly registered and comply with Tennessee boating laws and regulations.

In conclusion, while there is no boat ramp named Jefferson Springs Rec Area Smyrna in Tennessee, the Jefferson Springs Recreation Area in Tazewell is a popular destination for boaters and offers a wide concrete ramp, dock, and ample parking for vehicles and trailers. The ramp services Norris Lake, which allows for a variety of watercraft including fishing boats, pontoon boats, ski boats, and personal watercraft.