Alceste
Vagabond
That makes me wonder as well. If we were talking about some top secret info that even an oversight committee isn't privy to then I wouldn't have a problem...but we're talking about a situation surrounding a public bridge and a state government. So I guess it's out of the question to get the unedited documents at this.
I used to have the job of proof reading redactions on FOI disclosures to comply with privacy regulation. It was in the UK, but these laws are pretty similar around the western world. You are obligated to disclose the requested info, but there are loopholes big enough to drive a herd of buffalo through. Certainly large enough for one chubby governor. The media could argue that it is in the public interest to know who was involved in this communication, but they're gonna need lawyers. If law enforcement decides to investigate, they get clean files with all the names named, and some of that could become public record during a trial.
Anyway, I know who usually gets to wield the marker from experience, and my best guess is that the name was blacked out by clerical staff before the documents even left Christie's office, probably to avoid embarrassing someone "important". The person with the marker usually leaves it to the lawyers or FOI department to figure out a legal exemption that might apply.