We are a subcontractor on a Public Works project ( Waste Water Treatment Plant), the project was supposed to be complted December 2017 but is still ongoing. we have been paid to date on everything that is owed to us except for retainage, we are 89% complete with our scope of work. Delays have nothing to do with any of our work. My question is should we file a claim of some kind on the bond for retainage?