The Illinois option order of 12 Chargers was stated in the September status report by the Next Gen equipment pool committee. So that is not new info. But the 12 units are not necessarily going to Illinois corridor services. IL DOT is acting as the buyer for the Midwest joint consortium for the Chargers and Nippon-Sharyo bi-level cars, so the 12 additional locomotives are presumably going to the joint equipment pool. Don't know whether the 3 states in the consortium are paying for part or all the costs for the 12 units or if federal funds are paying for them.The Illinois order is more interesting. The original plan was to replace the motive power for every single corridor out of Chicago and it seemed like enough but with no spares. But this is a very significant additional number, which should not only cover spares and the Moline and Rockford services, but leave extras. I can't think of any more service expansions planned in Illinois which would need more locomotives -- is Illinois planning to lease some of these to Michigan for their proposed service expansions?
The order is now up to 66 including 8 for MARC, or 58 without.
This is a substantial addition to Amtrak motive power. I think the Dash-8s will probably be removed from service, or they might continue a strange life as very-fuel-hungry switchers. I'm not sure how many Chargers will replace F59PHIs (which will probably be retired) versus how many Chargers will replace P42s in the corridors (allowing more P42s to run in long-distance service). I guess this is basically a question of how many F59PHIs will be retired. F59PHIs are currently used mostly in California and Washington State and both states are ordering lots of Chargers. The F59PHIs might all be retired, in which case the order so far wouldn't actually free up very many P42s. But on the other hand Amtrak still has to run F59PHIs because of North Carolina, so California might keep a bunch around....
As for the F59PHIs, why would Amtrak retire them? The F59s were delivered in 1998, so they are younger than some of the P-42s. I doubt that California or Washington State would keep any F59s around once they have all the new Chargers in service. The states will own the Chargers, so they don;t have to pay Amtrak capital equipment costs. The F59s might end up on the east coast as corridor diesels for the Virginia Regionals, maybe the Vermonter and the Downeaster.
The interesting thing is that according to the recently posted Capital Investment Plan for FY2016-FY2020 for state corridors services by the 514 Capital Equipment Subcommittee, 5 out of the 21 F59PHIs are not in a state of good repair and are scheduled for overhauls in FY16 and FY17 to return to service. The states (CA?) are paying for the overhauls, but I wonder if the overhaul plans might change with the order for additional Chargers. BTW, the Capital Investment Plan for FY16-FY20 posted on the subcommittee website has a very detailed breakdown of what the states and Amtrak expect to spend for equipment maintenance and capital charges over the next 5 years.