dbase:
I would try to determine what discipline I prefer being in rather than where can I find a project. If you like transportation or hydraulics more than structures attempt the move for that reason, not lack of activity. A new hire out of college has the same problem in all the disciplines.
I agree with other comments, ASK for something to do. Show motivation. For example, ask what type of structures you company tends to work on. Let's say they tell you they do a lot of concrete circular clarifiers or steel tanks and hoppers. Neither of those tend to be taught in college, so there is a good place to start learning. Get up to speed on them is not a bad sign of motivation. You will find college did not teach you everything you need to know but it did give you the tools to learn on your own with guidance from your mentor. If you do not have a mentor in the company, get a good one.
When you say "on my 2nd job", do you mean 2nd employer or 2nd project?