Based on the latest information available, the boat ramp named West Street 121 in Springfield, Massachusetts is a concrete boat ramp located at the following coordinates: latitude 42.10906601 and longitude -72.61218262.

The West Street 121 boat ramp is about 12 feet wide, making it suitable for smaller watercraft such as kayaks, canoes, and small fishing boats. However, larger boats may not be able to launch or retrieve from this ramp due to its narrower size.

This boat ramp services the Connecticut River, which is a major waterway in the region that spans across multiple states. The Connecticut River is known for its diverse wildlife and recreational activities, including fishing, boating, and kayaking.

As for the types of craft permitted on the water, it may vary based on the regulations of the specific area. However, in general, the Connecticut River allows for a wide range of watercraft, including motorboats, sailboats, kayaks, canoes, and paddleboards. It is important to check with local authorities or the governing body of the waterway to ensure compliance with any safety regulations or restrictions on watercraft.