The 26.4 mile (42.5 km) common carrier railroad was built to serve the mines in the region.
The railroad built from a connection with the SFP&P at Entro and extended south to Poland Junction and terminated at Mayer.
At Poland Junction and Mayer the P&E connected with the Bradshaw Mountain Railroad, also a non-operating subsidiary of the SFP&P.
The first four miles of the line are now the Iron King Trail to Prescott Valley, Arizona.
P&E #11 (builder number 3073) and #12 (builder number 3072) were Brooks Locomotive Works 4-6-0 (also known as a Chesapeake or Ten-wheeler, UIC classification 2'C) steam locomotives with 19×24 inch cylinders and 56 inch (142 cm) drivers with a weight of 106,800 pounds (48,490 kg) and 22,270 pounds (10,110 kg) of effort.