It's been a long and busy construction season!  Most aspects of the job have gone smoothly but there have been a couple hangups.  The biggest so far is the poles used to support the overhead "Meter On" signs.  Not installed often, the normally highly reliable vendor failed their on-site inspections twice and delivered the poles much later than anticipated.  Then another exceptionally long delay with one small component, the U-bolts that hold the signs to the poles.  The other constant headache has been the overly long contract (hundreds of pages), impacts the contractor as well as the owner.  It has resulted in excessive amounts of time required to review the contract on a regular basis, and decisions being made that later had to be painfully rescinded. 
What has gone well?  The RE assigned to the project is about the highest quality peer any contractor could hope to work with.  Been around long enough to know the ropes, very responsive, highly competent and professional.  The environmental issues that could have resulted in hangups were much easier to avoid because the contractor has control of the schedule and was able to schedule the work and get it done in seasons where the issues were not at issue.  ie, work near a marsh was completed before the start of breeding season.  We were able to negotiate through these issues with highly competent guidance from subs BKF Engineers and HT Harvey Consultants.  One excellent subcontractor, KG Concrete, was able to get new foundations installed on the sides of existing flyover ramps and meet a tight critical path schedule.  Other excellent subs, Cal Safety and Maxim Crane were able to meet the demands of last minute schedule changes.  For many of the staff involved it has been an exceptionally exciting year.  We figured our way around a lot of big challenges. 
What has not gone well?  Issues mentioned above, and learning processes on the fly that are normally handled by the Owner such as coordinating new electrical service orders.  Policies that a contractor would normally never even have to think about become major headaches. 
Lesson learned:  Think twice before ever bidding a job like this again.