Water Life states it is retired and we are confident that we found in the rock wall where Flood! should be but had no luck finding it :(

Thanks for planting at the Gorge! Love it! I am trying to edit my answer about this find because I just saw what others said, and I know these good boxers. The first one is indeed gone, but the second one, if you follow the clue exactly, you realize the plant is the one on the left, and voilà, the box was right there -- deep but there. But when you look from the side you're crossing over first, it seems like it's the plant on the other side -- or even the now dug up empty space there between the rocks, but it is not! So, we really did find box two right where you said.
Ellen (of The Travelers 4)

The clues were a little tricky but once I found the right "stack" of two rocks, I found Flood!

Box2 Flood is there! Thanks

Yes they are absolutely missing!

I'm sure I had the correct spots but both are gone.