The Brookings Institute reports relies on accounting information that is suspect[1] and it looks like the route is a money loser when capital costs are taken into account[2]. The Inspector General's report is one of those nasty reports that show some manipulation.

1) http://www.oig.dot.gov/sites/dot/files/Amtrak's%20New%20Cost...

2) http://cs.trains.com/trn/b/fred-frailey/archive/2011/05/13/i...