Do you plan to propose? Don't do it anywhere near water, or grates, or anywhere that the ring can be lost, because it will. That's Murphy's Law at it's finest.

This poor sucker decided not to heed the warnings, and proposed to his girlfriend on a boat. I'm sure you can guess how it goes from there, but check out this video anyhow. Never gets old. Way to go, dude.

No word so far as to whether the ring was found, and I promise to look for a long zero whole hours before digging up, or out, this answer for you.