How much of a drop?
It's roughly 16 inches or so. And the ground does not slope down after I drop off the bridge.

It took me days to "get it"...keep at it!
Yeah, I was pretty sore the afternoon I practiced riding off our deck. Congratulations by the way!

Perhaps you need to learn a bit more of a wheelie technique to help lift that wheel? Or just not pulling up properly? I like instructional videos like this one.
Thanks Sadie! I have been watching a few You Tube videos but I think these will be more helpful. Thanks everyone for your tips. I've got to practice some more.