The Rock River - Chestnut Street Boat Launch is located in the city of Oconomowoc, Wisconsin. It is a public boat ramp that provides boaters with access to the Rock River. The boat ramp is primarily intended for small to medium-sized boats like fishing boats, pontoons, and jet skis.

According to the latest information available, the boat ramp is approximately 20 feet wide, which should be enough to accommodate most boats. It is also said to be in good condition and well-maintained.

The Rock River - Chestnut Street Boat Launch provides access to the Rock River, which is a 299-mile-long tributary of the Mississippi River. The river is known for its excellent fishing opportunities, particularly for smallmouth bass, walleye, and northern pike.

In terms of the types of craft permitted on the water, there are no specific restrictions mentioned for the Rock River - Chestnut Street Boat Launch. However, it is worth noting that some areas of the river may be shallower than others and may not be suitable for larger boats or boats with deeper drafts.

In conclusion, the Rock River - Chestnut Street Boat Launch is a public boat ramp located in Oconomowoc, Wisconsin, that provides access to the Rock River. It is suitable for small to medium-sized boats and is approximately 20 feet wide. The Rock River is known for its excellent fishing opportunities, and there are no specific restrictions on the types of craft permitted on the water.