So there's an earthcache here that I've been interested in getting... It's the Tidal Earthcache by TAT http://www.geocaching.com/seek/cache...a-9c0f9fd9cbe0
Now these caches are being retired at the end of the month. I've been watching the tide charts and it happens that a projected low tide on 12/31 at 5:06 +/- of -1.1. It's not the lowest, but it's one of the few that are that low and the only one that's a candidate before it's archived. If you're in the OOB area around that time, you might want to check it out.