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After conducting research, I was unable to find any information about a boat ramp specifically named "Cummings Highway Chattanooga" in Tennessee. However, there are several boat ramps in the Chattanooga area that may be of interest.

One popular boat ramp in Chattanooga is the Chickamauga Dam Reservation Boat Ramp, located at 301 Manufacturers Rd, Chattanooga, TN 37405. This boat ramp provides access to the Tennessee River and is open year-round. It is suitable for a variety of watercraft, including motorized boats, kayaks, and canoes. The Chickamauga Dam Reservation Boat Ramp is also relatively wide, with four lanes available for launching and retrieving boats.

Another boat ramp in the Chattanooga area is the Booker T. Washington State Park Boat Ramp, located at 5801 Champion Rd, Chattanooga, TN 37416. This boat ramp provides access to Chickamauga Lake and is open year-round. It is suitable for a variety of watercraft, including motorized boats, kayaks, and canoes. The Booker T. Washington State Park Boat Ramp is relatively wide, with two lanes available for launching and retrieving boats.

It is important to note that rules and regulations for boat ramps and watercraft can vary depending on the location and body of water. Users should always check with local authorities and regulations before launching any watercraft.