not really as hart had consulting engineers to review all the bids and other engineering issues that came up.  but, his problem was that he did not know how to manage the project, what was important, etc.  what screwed him up was horner, who thought that he knew more about the project than anyone else and gabby was deathly afraid of him, and literally was his yes man.  I would give horner an equal blame for the mismanagement of the project.