Thanks, that was it. The August, 1982 NSS News has the complete story of the connection. I hadn't read that article in quite a few years, and it is just excellent. If you have never read it, it is worth taking the time to find a copy and reading it.
Jeff Sims and Charles Clark did a wonderful job writing it. Paul Smith was indeed the diver who made the connection. The sump was 310 feet long.