It is not the low-bid process that is at fault, and we do not know if that was used for this project. Plans are drawn up by engineers and/or architects and the contractors must build according to those plans and specs.    Work done by contractors, no matter who they are or how much they bid, must be monitored. That is the job of the State DAGS inspectors.  I have had the painful experience of working with them, and they are the laziest, most incompetent bunch of slackers I have ever been around.