Chris,
It really depends on your targeted market. Heavy industrial, light industrial, commercial, manufacturing, shop/field fabrication etc.
We subscribe to the AGC. Association of General Contractors of the Carolinas. Problem is, so does every one else in the free world....IMO not that useful to us but it has lots of info on upcoming projects. Mostly commercial, highway/bridge, utility work. Many contractors use it exclusively. You don't have to be a GC, can be a prime or sub contractor also.
I suggest calling, emailing or better yet visiting any plants, companies, businesses in your area that you might be able to help out now or in the future. Provide your companies capabilities and contact info. Even visit job site in progress, hopefully in the early phases, usually they already have everything contracted out but you never know. Their contractors may be behind or deficient or they may keep you in mind on their next project. The more contacts you make the better your chances of getting something now or later. If you do drum up some work, try to make them a repeat customer.
Good luck.
http://www.agc.org/cs/about_agc/find_a_chapter