The United Railway Trust rosters a fleet of 37 Alco C-420 locomotives, collected from various sources since the LT&L’s initial purchase in 1963.

The first batch (414-435) were new units for the LT&L after that railroad merged with the PV&T and TdM in 1962. 14 of these units were delivered (as class DL9P) with steam heat for passenger service on the LT&L’s Ligne de la rive sud between Montréal & Ville Québec, while the remainder were delivered as freight units.

After the end of passenger operations south of the river, most of the passenger units ended up having their boilers removed and short noses cut down for better visibility (as shown here by B&Q #418), then were reclassified to class DL9.

The second batch (469-482) were acquired with the purchase of the D&H in 1984. These were second hand units – they were originally owned by the Lehigh & Hudson River and Lehigh Valley, but were hot-potatoed over to the D&H after the L&HR and LV were merged into Conrail.

In the 2020s, they started to be remanufactured at ILW with modern internals and a Tier 4f prime mover (a Cummins QSK60 diesel). This program was slowed by the China Tunnel Project, but by the mid 2020s most of them had been remanufactured.

At about the same time as this remanufacturing process began, the a third batch of C-420s started to trickle in as shortlines that kept them finally started trading in their no-​longer-​even-​close-​to-​EPA-​conformant historic locomotives, which ILW then put into the remanufacturing line and sold to the railways that make up the Northeastern District of the United Railway Trust.

All of these units, whether remanufactured or not, remain in service on various non-electrified lines in Canada and the northeastern USA.