According to the latest information available, the boat ramp named Grove Street 251 in New Milford, Connecticut is a concrete boat ramp that is approximately 25 feet wide. It services the Housatonic River, which is a major tributary of the Connecticut River and spans over 149 miles. The boat ramp is located at the latitude of 41.55546951 and longitude of -73.40643311.

The Grove Street 251 boat ramp allows for a variety of watercraft to be launched, including kayaks, canoes, and powerboats. However, it is important to note that there may be specific regulations or restrictions in place for certain types of watercraft. It is recommended to verify any regulations or requirements with the appropriate authorities before launching any watercraft.

Overall, the Grove Street 251 boat ramp provides easy access to the Housatonic River and is a popular destination for boaters and anglers in the New Milford area.