Ok, but the info I have says that RO's grow like trees and AO's are bushier. I ran into a situation a few years ago where someone reported a grove of RO's that turned out to be AO's. His grandmother had maintained to everybody in the area and the family that these were Russian Olive but they turned out to be Autumn Olive, much to my disappointment. Thus, I am somewhat skeptical about AO vs RO identification. Once burned, as they say.
So when you say bushes, that makes me think maybe AO. In any case, don't fall out or don't fall in!
I do know that they have the fruit shown in Wikipedia, so pretty sure they are ROs. I got to thinking about them, they have a lot of snow in E. WA, and the limbs break, I believe that is what keeps most of them bushier. They also have large trunks and some are quite tall. Also very invasive in the Yakima Valley along the river. I guess the birds really spread the seed around. 
