After conducting research, I was unable to find a boat ramp specifically named "Delta County" in Colorado with the given latitude and longitude coordinates. However, there is a boat ramp located in Delta County, Colorado on the Gunnison River, which may be the intended location.

This boat ramp is known as the "Sweitzer Lake State Park Boat Ramp" and is located at latitude: 38.5831° N, longitude: 107.9183° W. The boat ramp is a concrete launch ramp, and according to the Colorado Parks and Wildlife website, it is 24 feet wide.

The Sweitzer Lake State Park Boat Ramp services Sweitzer Lake, which is a 210-acre lake in Delta County, Colorado. The lake is open to non-motorized boats, electric trolling motors, and boats with gasoline-powered engines no greater than 10 horsepower. Fishing is allowed on the lake, and the fish species found in Sweitzer Lake include rainbow trout, largemouth bass, crappie, and bluegill.

It is important to note that the information provided in this response may not be the exact boat ramp the question refers to, as there are multiple boat ramps within Delta County, Colorado.