Based on the available information, the boat ramp named Ln 340 Jimmerson Lake 500-540 in Angola, Indiana is a public boat ramp. It is approximately 40 feet wide and services Jimmerson Lake, which is a 203-acre freshwater lake in Steuben County. The lake is suitable for various water activities, including fishing, boating, and swimming.

According to the Indiana Department of Natural Resources, Jimmerson Lake has a maximum depth of 45 feet, and it is home to several species of fish, including bluegill, largemouth bass, and northern pike. The lake also permits various types of watercraft, including motorboats, sailboats, canoes, kayaks, and personal watercraft.

It is essential to note that the information provided may be subject to change, and it is advisable to check with local authorities for the latest updates and regulations before using the boat ramp.