Santa Fe, Prescott and Phoenix Railway
The Santa Fe, Prescott and Phoenix Railway (SFP&P) was a common carrier railroad that later became an operating subsidiary of the Atchison, Topeka and Santa Fe Railway in Arizona. At Ash Fork, Arizona, the SFP&P connected with Santa Fe's operating subsidiary, the Atlantic & Pacific Railroad mainline, that ran from California to Chicago.
Source: Wikipedia — Santa Fe, Prescott and Phoenix Railway (CC BY-SA 4.0)