Could it be A. americana? Looks a little droopy, though.

Tom

I figured it would be a really common as it came as a pass along plant. I wondered about it because it more green, than others I seen with the gray green (blue color).

Another angle, See large plant in back color is more green than blue. I took this one in June to show the first pup bloom. I figured the bloom was from a plant compacted under the rock. The smaller agave in the front came from another person, therefore is not a pup from larger plan in the back.

It is too green to be agave Americana. It looks like a Native hybrid intergrade of Agave salmiana- ferox, not the wide leafed Salmiana -ferox "Green Goblet", but one of the older nameless strappier ones that are circulating around forever. They are very cold and moisture tolerant. This is not a firm ID but a suggestion.

Here is one some that I have. It is bullet proof.