More Coal at the Locomotive Maintenance Facility.
At the height of the steam locomotive era there were large, central locomotive maintenance facilities, where the locomotives were handled as if on an assembly line. At the end of the steam locomotive era the maintenance activities were concentrated into a few locomotive maintenance facilities that were even expanded for the purpose.
Fast handling was achieved with several cradle bunkers arranged on parallel tracks one behind the other. Powerful clamshell cranes and appropriate switching of freight cars on the coaling track were a requirement for smooth operation.
One reservoir was enough for about two to three loads of coal for tenders on road engines. As an example, the two locomotives for "Long Henry" were ready in several minutes for a run.