I would like to thank Kevin Redden on the Great Loop list for the pointer to the official drawbridge regulations in a recent thread on that mailing list.

The general regulations are an easy and interesting read, and can be a real eye opener for many boaters.

The regulations for specific bridges are in Subpart B of 117, and that starts halfway down part 117, starting at section 117.101, still at the same URL shown above.

Kevin